From f6d5b33125c4fa63c16f7f54c533338c9695d82c Mon Sep 17 00:00:00 2001 From: John Stultz Date: Tue, 29 Mar 2011 18:00:27 -0700 Subject: RTC: Fix early irqs caused by calling rtc_set_alarm too early When we register an rtc device at boot, we read the alarm value in hardware and set the rtc device's aie_timer to that value. The initial method to do this was to simply call rtc_set_alarm() with the value read from hardware. However, this may cause problems as rtc_set_alarm may enable interupts, and the RTC alarm might fire, which can cause invalid pointer dereferencing since the RTC registration is not complete. This patch solves the issue by initializing the rtc_device.aie_timer y hand via rtc_initialize_alarm(). This avoids any calls to the RTC hardware which might enable interrupts too early. CC: Thomas Gleixner CC: Alessandro Zummo Reported-by: Konrad Rzeszutek Wilk Tested-by: Konrad Rzeszutek Wilk Signed-off-by: John Stultz --- drivers/rtc/class.c | 2 +- drivers/rtc/interface.c | 26 ++++++++++++++++++++++++++ include/linux/rtc.h | 2 ++ 3 files changed, 29 insertions(+), 1 deletion(-) diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c index 09b4437b3e6..39013867cbd 100644 --- a/drivers/rtc/class.c +++ b/drivers/rtc/class.c @@ -171,7 +171,7 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev, err = __rtc_read_alarm(rtc, &alrm); if (!err && !rtc_valid_tm(&alrm.time)) - rtc_set_alarm(rtc, &alrm); + rtc_initialize_alarm(rtc, &alrm); strlcpy(rtc->name, name, RTC_DEVICE_NAME_SIZE); dev_set_name(&rtc->dev, "rtc%d", id); diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index 8ec6b069a7f..b2fea80dfb6 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -375,6 +375,32 @@ int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) } EXPORT_SYMBOL_GPL(rtc_set_alarm); +/* Called once per device from rtc_device_register */ +int rtc_initialize_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm) +{ + int err; + + err = rtc_valid_tm(&alarm->time); + if (err != 0) + return err; + + err = mutex_lock_interruptible(&rtc->ops_lock); + if (err) + return err; + + rtc->aie_timer.node.expires = rtc_tm_to_ktime(alarm->time); + rtc->aie_timer.period = ktime_set(0, 0); + if (alarm->enabled) { + rtc->aie_timer.enabled = 1; + timerqueue_add(&rtc->timerqueue, &rtc->aie_timer.node); + } + mutex_unlock(&rtc->ops_lock); + return err; +} +EXPORT_SYMBOL_GPL(rtc_initialize_alarm); + + + int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled) { int err = mutex_lock_interruptible(&rtc->ops_lock); diff --git a/include/linux/rtc.h b/include/linux/rtc.h index 2ca7e8a7806..877ece45426 100644 --- a/include/linux/rtc.h +++ b/include/linux/rtc.h @@ -228,6 +228,8 @@ extern int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alrm); extern int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alrm); +extern int rtc_initialize_alarm(struct rtc_device *rtc, + struct rtc_wkalrm *alrm); extern void rtc_update_irq(struct rtc_device *rtc, unsigned long num, unsigned long events); -- cgit v1.2.3-18-g5258 From a54aba87bb8e90f9e39bcfe151717b86abbbdd79 Mon Sep 17 00:00:00 2001 From: Vasily Khoruzhick Date: Thu, 24 Mar 2011 22:09:33 +0200 Subject: RTC: Fix s3c compile error due to missing s3c_rtc_setpie s3c_rtc_setpie was removed, and it resulted in compiler error: drivers/rtc/rtc-s3c.c: In function s3c_rtc_release drivers/rtc/rtc-s3c.c:339:2: error: implicit declaration of function s3c_rtc_setpie Fix it by removing s3c_rtc_release calls. [jstultz: An identical fix was also sent in by Jiri Pinkava ] CC: Thomas Gleixner CC: Alessandro Zummo Signed-off-by: Vasily Khoruzhick Signed-off-by: John Stultz --- drivers/rtc/rtc-s3c.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index 714964913e5..b3466c491cd 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -336,7 +336,6 @@ static void s3c_rtc_release(struct device *dev) /* do not clear AIE here, it may be needed for wake */ - s3c_rtc_setpie(dev, 0); free_irq(s3c_rtc_alarmno, rtc_dev); free_irq(s3c_rtc_tickno, rtc_dev); } @@ -408,7 +407,6 @@ static int __devexit s3c_rtc_remove(struct platform_device *dev) platform_set_drvdata(dev, NULL); rtc_device_unregister(rtc); - s3c_rtc_setpie(&dev->dev, 0); s3c_rtc_setaie(&dev->dev, 0); clk_disable(rtc_clk); -- cgit v1.2.3-18-g5258 From 8c122b96866580c99e44f3f07ac93a993d964ec3 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Fri, 18 Mar 2011 04:26:24 -0400 Subject: RTC: add missing "return 0" in new alarm func for rtc-bfin.c The new bfin_rtc_alarm_irq_enable function forgot to add a "return 0" to the end leading to the build warning: drivers/rtc/rtc-bfin.c: In function 'bfin_rtc_alarm_irq_enable': drivers/rtc/rtc-bfin.c:253: warning: control reaches end of non-void function CC: stable@kernel.org CC: Thomas Gleixner CC: Alessandro Zummo Signed-off-by: Mike Frysinger Signed-off-by: John Stultz --- drivers/rtc/rtc-bfin.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/rtc/rtc-bfin.c b/drivers/rtc/rtc-bfin.c index ca9cff85ab8..f2496440d07 100644 --- a/drivers/rtc/rtc-bfin.c +++ b/drivers/rtc/rtc-bfin.c @@ -250,6 +250,8 @@ static int bfin_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) bfin_rtc_int_set_alarm(rtc); else bfin_rtc_int_clear(~(RTC_ISTAT_ALARM | RTC_ISTAT_ALARM_DAY)); + + return 0; } static int bfin_rtc_read_time(struct device *dev, struct rtc_time *tm) -- cgit v1.2.3-18-g5258 From c8309ef6a4c52919d44bbc9743d7ea05ae8f4c7f Mon Sep 17 00:00:00 2001 From: Colin Cross Date: Wed, 30 Mar 2011 00:24:43 -0700 Subject: ARM: tegra: gpio: Fix unused variable warnings Change b0f18edaf6ee4e6fac89cae63a90bd38ad2a3418 (arm: tegra: Remove unused bogus irq enable/disable magic) introduces warnings: arch/arm/mach-tegra/gpio.c: In function 'tegra_gpio_resume': arch/arm/mach-tegra/gpio.c:260: warning: unused variable 'i' arch/arm/mach-tegra/gpio.c: In function 'tegra_gpio_suspend': arch/arm/mach-tegra/gpio.c:283: warning: unused variable 'i' Fix them, and fix a coding style issue on the same lines. Signed-off-by: Colin Cross Acked-by: Erik Gilling --- arch/arm/mach-tegra/gpio.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-tegra/gpio.c b/arch/arm/mach-tegra/gpio.c index 76a3f654220..65a1aba6823 100644 --- a/arch/arm/mach-tegra/gpio.c +++ b/arch/arm/mach-tegra/gpio.c @@ -257,7 +257,8 @@ static void tegra_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) void tegra_gpio_resume(void) { unsigned long flags; - int b, p, i; + int b; + int p; local_irq_save(flags); @@ -280,7 +281,8 @@ void tegra_gpio_resume(void) void tegra_gpio_suspend(void) { unsigned long flags; - int b, p, i; + int b; + int p; local_irq_save(flags); for (b = 0; b < ARRAY_SIZE(tegra_gpio_banks); b++) { -- cgit v1.2.3-18-g5258 From 62f0988ee5280ac03f787e3abd70bd91366e3778 Mon Sep 17 00:00:00 2001 From: David Brown Date: Tue, 29 Mar 2011 11:48:45 -0700 Subject: msm: Remove extraneous ffa device check The qsd8x50 board file contains a few references to machine_is_... macros that are otherwise unused, and contain no machine definition. The recent purge of unused machine definitions breaks the compilation of this target. Since the machine cannot ever be used, just remove the bogus checks. Signed-off-by: David Brown --- arch/arm/mach-msm/board-qsd8x50.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/arch/arm/mach-msm/board-qsd8x50.c b/arch/arm/mach-msm/board-qsd8x50.c index 7f568611547..6a96911b0ad 100644 --- a/arch/arm/mach-msm/board-qsd8x50.c +++ b/arch/arm/mach-msm/board-qsd8x50.c @@ -160,10 +160,7 @@ static struct msm_mmc_platform_data qsd8x50_sdc1_data = { static void __init qsd8x50_init_mmc(void) { - if (machine_is_qsd8x50_ffa() || machine_is_qsd8x50a_ffa()) - vreg_mmc = vreg_get(NULL, "gp6"); - else - vreg_mmc = vreg_get(NULL, "gp5"); + vreg_mmc = vreg_get(NULL, "gp5"); if (IS_ERR(vreg_mmc)) { pr_err("vreg get for vreg_mmc failed (%ld)\n", -- cgit v1.2.3-18-g5258 From 893b66c39da812e7dd0d7b32aa0633e5d90d950c Mon Sep 17 00:00:00 2001 From: David Brown Date: Wed, 30 Mar 2011 11:26:57 -0700 Subject: msm: timer: fix missing return value Change af90f10d38 "ARM: 6759/1: smp: Select local timers vs broadcast timer support runtime" missed a return statement, causing a compile warning: arch/arm/mach-msm/timer.c:272: warning: 'return' with no value, in function returning non-void Trivially return 0 for success when running on cpu 0 (to match the comment and previous behavior). Signed-off-by: David Brown --- arch/arm/mach-msm/timer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c index 56f920c55b6..38b95e949d1 100644 --- a/arch/arm/mach-msm/timer.c +++ b/arch/arm/mach-msm/timer.c @@ -269,7 +269,7 @@ int __cpuinit local_timer_setup(struct clock_event_device *evt) /* Use existing clock_event for cpu 0 */ if (!smp_processor_id()) - return; + return 0; writel(DGT_CLK_CTL_DIV_4, MSM_TMR_BASE + DGT_CLK_CTL); -- cgit v1.2.3-18-g5258 From 906c3b616dcf8e64b11d7d665d62f5e9940f4d46 Mon Sep 17 00:00:00 2001 From: Nicolas Kaiser Date: Wed, 30 Mar 2011 15:59:11 +0200 Subject: arm: tegra: fix error check in tegra2_clocks.c Checking 'rate < 0' doesn't work because 'rate' is unsigned. Signed-off-by: Nicolas Kaiser Signed-off-by: Colin Cross --- arch/arm/mach-tegra/tegra2_clocks.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/arch/arm/mach-tegra/tegra2_clocks.c b/arch/arm/mach-tegra/tegra2_clocks.c index 6d7c4eea4dc..4459470c052 100644 --- a/arch/arm/mach-tegra/tegra2_clocks.c +++ b/arch/arm/mach-tegra/tegra2_clocks.c @@ -1362,14 +1362,15 @@ static int tegra_clk_shared_bus_set_rate(struct clk *c, unsigned long rate) { unsigned long flags; int ret; + long new_rate = rate; - rate = clk_round_rate(c->parent, rate); - if (rate < 0) - return rate; + new_rate = clk_round_rate(c->parent, new_rate); + if (new_rate < 0) + return new_rate; spin_lock_irqsave(&c->parent->spinlock, flags); - c->u.shared_bus_user.rate = rate; + c->u.shared_bus_user.rate = new_rate; ret = tegra_clk_shared_bus_update(c->parent); spin_unlock_irqrestore(&c->parent->spinlock, flags); -- cgit v1.2.3-18-g5258 From 29ea23ff905d07d8559bac69cca46f4bbf20038c Mon Sep 17 00:00:00 2001 From: Russell King Date: Sat, 2 Apr 2011 10:08:55 +0100 Subject: ARM: Make consolidated PM sleep code depend on PM_SLEEP CONFIG_PM is now set whenever we support either runtime PM in addition to suspend and hibernate. This causes build errors when runtime PM is enabled on a platform, but the CPU does not have the appropriate support for suspend. So, switch this code to use CONFIG_PM_SLEEP rather than CONFIG_PM to allow runtime PM to be enabled without causing build errors. Signed-off-by: Russell King --- arch/arm/kernel/Makefile | 2 +- arch/arm/mm/proc-arm920.S | 2 +- arch/arm/mm/proc-arm926.S | 2 +- arch/arm/mm/proc-sa1100.S | 2 +- arch/arm/mm/proc-v6.S | 2 +- arch/arm/mm/proc-v7.S | 2 +- arch/arm/mm/proc-xsc3.S | 2 +- arch/arm/mm/proc-xscale.S | 2 +- 8 files changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index 74554f1742d..8d95446150a 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -29,7 +29,7 @@ obj-$(CONFIG_MODULES) += armksyms.o module.o obj-$(CONFIG_ARTHUR) += arthur.o obj-$(CONFIG_ISA_DMA) += dma-isa.o obj-$(CONFIG_PCI) += bios32.o isa.o -obj-$(CONFIG_PM) += sleep.o +obj-$(CONFIG_PM_SLEEP) += sleep.o obj-$(CONFIG_HAVE_SCHED_CLOCK) += sched_clock.o obj-$(CONFIG_SMP) += smp.o smp_tlb.o obj-$(CONFIG_HAVE_ARM_SCU) += smp_scu.o diff --git a/arch/arm/mm/proc-arm920.S b/arch/arm/mm/proc-arm920.S index 219980ec8b6..394b623b092 100644 --- a/arch/arm/mm/proc-arm920.S +++ b/arch/arm/mm/proc-arm920.S @@ -390,7 +390,7 @@ ENTRY(cpu_arm920_set_pte_ext) /* Suspend/resume support: taken from arch/arm/plat-s3c24xx/sleep.S */ .globl cpu_arm920_suspend_size .equ cpu_arm920_suspend_size, 4 * 3 -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP ENTRY(cpu_arm920_do_suspend) stmfd sp!, {r4 - r7, lr} mrc p15, 0, r4, c13, c0, 0 @ PID diff --git a/arch/arm/mm/proc-arm926.S b/arch/arm/mm/proc-arm926.S index 6a4bdb2c94a..0ed85d930c0 100644 --- a/arch/arm/mm/proc-arm926.S +++ b/arch/arm/mm/proc-arm926.S @@ -404,7 +404,7 @@ ENTRY(cpu_arm926_set_pte_ext) /* Suspend/resume support: taken from arch/arm/plat-s3c24xx/sleep.S */ .globl cpu_arm926_suspend_size .equ cpu_arm926_suspend_size, 4 * 3 -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP ENTRY(cpu_arm926_do_suspend) stmfd sp!, {r4 - r7, lr} mrc p15, 0, r4, c13, c0, 0 @ PID diff --git a/arch/arm/mm/proc-sa1100.S b/arch/arm/mm/proc-sa1100.S index 74483d1977f..184a9c997e3 100644 --- a/arch/arm/mm/proc-sa1100.S +++ b/arch/arm/mm/proc-sa1100.S @@ -171,7 +171,7 @@ ENTRY(cpu_sa1100_set_pte_ext) .globl cpu_sa1100_suspend_size .equ cpu_sa1100_suspend_size, 4*4 -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP ENTRY(cpu_sa1100_do_suspend) stmfd sp!, {r4 - r7, lr} mrc p15, 0, r4, c3, c0, 0 @ domain ID diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S index 832b6bdc192..387441269cc 100644 --- a/arch/arm/mm/proc-v6.S +++ b/arch/arm/mm/proc-v6.S @@ -124,7 +124,7 @@ ENTRY(cpu_v6_set_pte_ext) /* Suspend/resume support: taken from arch/arm/mach-s3c64xx/sleep.S */ .globl cpu_v6_suspend_size .equ cpu_v6_suspend_size, 4 * 8 -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP ENTRY(cpu_v6_do_suspend) stmfd sp!, {r4 - r11, lr} mrc p15, 0, r4, c13, c0, 0 @ FCSE/PID diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S index 262fa88a743..713cea199ea 100644 --- a/arch/arm/mm/proc-v7.S +++ b/arch/arm/mm/proc-v7.S @@ -211,7 +211,7 @@ cpu_v7_name: /* Suspend/resume support: derived from arch/arm/mach-s5pv210/sleep.S */ .globl cpu_v7_suspend_size .equ cpu_v7_suspend_size, 4 * 8 -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP ENTRY(cpu_v7_do_suspend) stmfd sp!, {r4 - r11, lr} mrc p15, 0, r4, c13, c0, 0 @ FCSE/PID diff --git a/arch/arm/mm/proc-xsc3.S b/arch/arm/mm/proc-xsc3.S index 63d8b2044e8..596213699f3 100644 --- a/arch/arm/mm/proc-xsc3.S +++ b/arch/arm/mm/proc-xsc3.S @@ -417,7 +417,7 @@ ENTRY(cpu_xsc3_set_pte_ext) .globl cpu_xsc3_suspend_size .equ cpu_xsc3_suspend_size, 4 * 8 -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP ENTRY(cpu_xsc3_do_suspend) stmfd sp!, {r4 - r10, lr} mrc p14, 0, r4, c6, c0, 0 @ clock configuration, for turbo mode diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S index 086038cd86a..ce233bcbf50 100644 --- a/arch/arm/mm/proc-xscale.S +++ b/arch/arm/mm/proc-xscale.S @@ -518,7 +518,7 @@ ENTRY(cpu_xscale_set_pte_ext) .globl cpu_xscale_suspend_size .equ cpu_xscale_suspend_size, 4 * 7 -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP ENTRY(cpu_xscale_do_suspend) stmfd sp!, {r4 - r10, lr} mrc p14, 0, r4, c6, c0, 0 @ clock configuration, for turbo mode -- cgit v1.2.3-18-g5258 From 6a7861825f79f09213ef81b3c468f6f2e86f408e Mon Sep 17 00:00:00 2001 From: Russell King Date: Sat, 2 Apr 2011 10:15:28 +0100 Subject: ARM: Only allow PM_SLEEP with CPUs which support suspend Offering CONFIG_PM_SLEEP for CPUs which do not support suspend leads to build errors, so only set CONFIG_ARCH_SUSPEND_POSSIBLE if we have a CPU selected which supports suspend. Signed-off-by: Russell King --- arch/arm/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 5b9f78b570e..9954c9bef67 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -2012,6 +2012,8 @@ source "kernel/power/Kconfig" config ARCH_SUSPEND_POSSIBLE depends on !ARCH_S5P64X0 && !ARCH_S5P6442 + depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \ + CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE def_bool y endmenu -- cgit v1.2.3-18-g5258 From 77f38e0eeac290827f41fd2215ab82546b8f73b8 Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Wed, 6 Apr 2011 09:09:16 -0700 Subject: libceph: fix linger request requeueing Fix the request transition from linger -> normal request. The key is to preserve r_osd and requeue on the same OSD. Reregister as a normal request, add the request to the proper queues, then unregister the linger. Fix the unregister helper to avoid clearing r_osd (and also simplify the parallel check in __unregister_request()). Reported-by: Henry Chang Signed-off-by: Sage Weil --- net/ceph/osd_client.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 3b91d651fe0..9204de484c2 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -579,9 +579,15 @@ static void __kick_osd_requests(struct ceph_osd_client *osdc, list_for_each_entry_safe(req, nreq, &osd->o_linger_requests, r_linger_osd) { - __unregister_linger_request(osdc, req); + /* + * reregister request prior to unregistering linger so + * that r_osd is preserved. + */ + BUG_ON(!list_empty(&req->r_req_lru_item)); __register_request(osdc, req); - list_move(&req->r_req_lru_item, &osdc->req_unsent); + list_add(&req->r_req_lru_item, &osdc->req_unsent); + list_add(&req->r_osd_item, &req->r_osd->o_requests); + __unregister_linger_request(osdc, req); dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid, osd->o_osd); } @@ -798,7 +804,7 @@ static void __register_request(struct ceph_osd_client *osdc, req->r_request->hdr.tid = cpu_to_le64(req->r_tid); INIT_LIST_HEAD(&req->r_req_lru_item); - dout("register_request %p tid %lld\n", req, req->r_tid); + dout("__register_request %p tid %lld\n", req, req->r_tid); __insert_request(osdc, req); ceph_osdc_get_request(req); osdc->num_requests++; -- cgit v1.2.3-18-g5258 From 8f74c0661c42104b3e3d2c032bc61efde15360ad Mon Sep 17 00:00:00 2001 From: Shubhrajyoti D Date: Wed, 6 Apr 2011 15:31:22 -0700 Subject: Input: twl4030_keypad - avoid potential NULL-pointer dereference Signed-off-by: Shubhrajyoti D Acked-by: Axel Lin Signed-off-by: Dmitry Torokhov --- drivers/input/keyboard/twl4030_keypad.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/input/keyboard/twl4030_keypad.c b/drivers/input/keyboard/twl4030_keypad.c index 09bef79d9da..cc06c4b2f92 100644 --- a/drivers/input/keyboard/twl4030_keypad.c +++ b/drivers/input/keyboard/twl4030_keypad.c @@ -338,7 +338,7 @@ static int __devinit twl4030_kp_probe(struct platform_device *pdev) u8 reg; int error; - if (!pdata || !pdata->rows || !pdata->cols || + if (!pdata || !pdata->rows || !pdata->cols || !pdata->keymap_data || pdata->rows > TWL4030_MAX_ROWS || pdata->cols > TWL4030_MAX_COLS) { dev_err(&pdev->dev, "Invalid platform_data\n"); return -EINVAL; -- cgit v1.2.3-18-g5258 From 908433833cac977563e9bef8b206990d846876b4 Mon Sep 17 00:00:00 2001 From: Christoph Fritz Date: Wed, 6 Apr 2011 15:33:16 -0700 Subject: Input: h3600_ts - fix error handling at connect In case of an error in h3600ts_connect(), deconstruct in correct order and with the right calls. Signed-off-by: Christoph Fritz Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/h3600_ts_input.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/input/touchscreen/h3600_ts_input.c b/drivers/input/touchscreen/h3600_ts_input.c index efa06882de0..45f93d0f559 100644 --- a/drivers/input/touchscreen/h3600_ts_input.c +++ b/drivers/input/touchscreen/h3600_ts_input.c @@ -399,31 +399,34 @@ static int h3600ts_connect(struct serio *serio, struct serio_driver *drv) IRQF_SHARED | IRQF_DISABLED, "h3600_action", &ts->dev)) { printk(KERN_ERR "h3600ts.c: Could not allocate Action Button IRQ!\n"); err = -EBUSY; - goto fail2; + goto fail1; } if (request_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, npower_button_handler, IRQF_SHARED | IRQF_DISABLED, "h3600_suspend", &ts->dev)) { printk(KERN_ERR "h3600ts.c: Could not allocate Power Button IRQ!\n"); err = -EBUSY; - goto fail3; + goto fail2; } serio_set_drvdata(serio, ts); err = serio_open(serio, drv); if (err) - return err; + goto fail3; //h3600_flite_control(1, 25); /* default brightness */ - input_register_device(ts->dev); + err = input_register_device(ts->dev); + if (err) + goto fail4; return 0; -fail3: free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, ts->dev); +fail4: serio_close(serio); +fail3: serio_set_drvdata(serio, NULL); + free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, ts->dev); fail2: free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, ts->dev); -fail1: serio_set_drvdata(serio, NULL); - input_free_device(input_dev); +fail1: input_free_device(input_dev); kfree(ts); return err; } -- cgit v1.2.3-18-g5258 From 67c1b8c6aa354aad14aad85d36508fd73d1c6361 Mon Sep 17 00:00:00 2001 From: Feng Tang Date: Thu, 7 Apr 2011 09:39:44 +0800 Subject: RTC: rtc-mrst: follow on to the change of rtc_device_register() commit f44f7f96a20 (RTC: Initialize kernel state from RTC) will call rtc_read_alarm() inside rtc_device_register(), so rtc-mrst driver need to call dev_set_drvdata() before rtc_device_register() get called. Cc: Alessandro Zummo Cc: John Stultz Cc: Thomas Gleixner Signed-off-by: Feng Tang Signed-off-by: John Stultz --- drivers/rtc/rtc-mrst.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/rtc/rtc-mrst.c b/drivers/rtc/rtc-mrst.c index b86bc328463..d2c397c369f 100644 --- a/drivers/rtc/rtc-mrst.c +++ b/drivers/rtc/rtc-mrst.c @@ -342,6 +342,8 @@ vrtc_mrst_do_probe(struct device *dev, struct resource *iomem, int rtc_irq) mrst_rtc.irq = rtc_irq; mrst_rtc.iomem = iomem; + mrst_rtc.dev = dev; + dev_set_drvdata(dev, &mrst_rtc); mrst_rtc.rtc = rtc_device_register(driver_name, dev, &mrst_rtc_ops, THIS_MODULE); @@ -350,8 +352,6 @@ vrtc_mrst_do_probe(struct device *dev, struct resource *iomem, int rtc_irq) goto cleanup0; } - mrst_rtc.dev = dev; - dev_set_drvdata(dev, &mrst_rtc); rename_region(iomem, dev_name(&mrst_rtc.rtc->dev)); spin_lock_irq(&rtc_lock); @@ -376,9 +376,10 @@ vrtc_mrst_do_probe(struct device *dev, struct resource *iomem, int rtc_irq) return 0; cleanup1: - mrst_rtc.dev = NULL; rtc_device_unregister(mrst_rtc.rtc); cleanup0: + dev_set_drvdata(dev, NULL); + mrst_rtc.dev = NULL; release_region(iomem->start, iomem->end + 1 - iomem->start); dev_err(dev, "rtc-mrst: unable to initialise\n"); return retval; -- cgit v1.2.3-18-g5258 From 621d26567fd0c222f419e3b5ddf39e529e0fdcb3 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Fri, 8 Apr 2011 12:11:06 +0200 Subject: perf: Fix a build error with some GCC versions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fix this: util/cgroup.c: In function ‘open_cgroup’: util/cgroup.c:16:16: error: ‘saved_ptr’ may be used uninitialized in this function util/cgroup.c:16:16: note: ‘saved_ptr’ was declared here Apparently newer GCC (4.6) can figure out that this variable is properly initialized - but some versions of GCC (such as 4.5.2) need help. Signed-off-by: Eric Dumazet Cc: Arnaldo Carvalho de Melo LKML-Reference: Signed-off-by: Ingo Molnar --- tools/perf/util/cgroup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c index 9fea7553522..96bee5c4600 100644 --- a/tools/perf/util/cgroup.c +++ b/tools/perf/util/cgroup.c @@ -13,7 +13,7 @@ cgroupfs_find_mountpoint(char *buf, size_t maxlen) { FILE *fp; char mountpoint[MAX_PATH+1], tokens[MAX_PATH+1], type[MAX_PATH+1]; - char *token, *saved_ptr; + char *token, *saved_ptr = NULL; int found = 0; fp = fopen("/proc/mounts", "r"); -- cgit v1.2.3-18-g5258 From be1a12a0dfed06cf1e62e35bf91620dc610a451a Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Wed, 6 Apr 2011 13:05:22 -0400 Subject: Btrfs: deal with the case that we run out of space in the cache Currently we don't handle running out of space in the cache, so to fix this we keep track of how far in the cache we are. Then we only dirty the pages if we successfully modify all of them, otherwise if we have an error or run out of space we can just drop them and not worry about the vm writing them out. Thanks, Tested-by Johannes Hirte Signed-off-by: Josef Bacik --- fs/btrfs/ctree.h | 5 ++ fs/btrfs/file.c | 21 ++++---- fs/btrfs/free-space-cache.c | 117 +++++++++++++++++++++----------------------- 3 files changed, 69 insertions(+), 74 deletions(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 3458b572554..0d00a07b5b2 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2576,6 +2576,11 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode, int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, struct inode *inode, u64 start, u64 end); int btrfs_release_file(struct inode *inode, struct file *file); +void btrfs_drop_pages(struct page **pages, size_t num_pages); +int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, + struct page **pages, size_t num_pages, + loff_t pos, size_t write_bytes, + struct extent_state **cached); /* tree-defrag.c */ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index e621ea54a3f..75899a01dde 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -104,7 +104,7 @@ static noinline int btrfs_copy_from_user(loff_t pos, int num_pages, /* * unlocks pages after btrfs_file_write is done with them */ -static noinline void btrfs_drop_pages(struct page **pages, size_t num_pages) +void btrfs_drop_pages(struct page **pages, size_t num_pages) { size_t i; for (i = 0; i < num_pages; i++) { @@ -127,16 +127,13 @@ static noinline void btrfs_drop_pages(struct page **pages, size_t num_pages) * this also makes the decision about creating an inline extent vs * doing real data extents, marking pages dirty and delalloc as required. */ -static noinline int dirty_and_release_pages(struct btrfs_root *root, - struct file *file, - struct page **pages, - size_t num_pages, - loff_t pos, - size_t write_bytes) +int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, + struct page **pages, size_t num_pages, + loff_t pos, size_t write_bytes, + struct extent_state **cached) { int err = 0; int i; - struct inode *inode = fdentry(file)->d_inode; u64 num_bytes; u64 start_pos; u64 end_of_last_block; @@ -149,7 +146,7 @@ static noinline int dirty_and_release_pages(struct btrfs_root *root, end_of_last_block = start_pos + num_bytes - 1; err = btrfs_set_extent_delalloc(inode, start_pos, end_of_last_block, - NULL); + cached); if (err) return err; @@ -992,9 +989,9 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file, } if (copied > 0) { - ret = dirty_and_release_pages(root, file, pages, - dirty_pages, pos, - copied); + ret = btrfs_dirty_pages(root, inode, pages, + dirty_pages, pos, copied, + NULL); if (ret) { btrfs_delalloc_release_space(inode, dirty_pages << PAGE_CACHE_SHIFT); diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index f561c953205..a3f420def0e 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -508,6 +508,7 @@ int btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode; struct rb_node *node; struct list_head *pos, *n; + struct page **pages; struct page *page; struct extent_state *cached_state = NULL; struct btrfs_free_cluster *cluster = NULL; @@ -517,13 +518,13 @@ int btrfs_write_out_cache(struct btrfs_root *root, u64 start, end, len; u64 bytes = 0; u32 *crc, *checksums; - pgoff_t index = 0, last_index = 0; unsigned long first_page_offset; - int num_checksums; + int index = 0, num_pages = 0; int entries = 0; int bitmaps = 0; int ret = 0; bool next_page = false; + bool out_of_space = false; root = root->fs_info->tree_root; @@ -551,24 +552,31 @@ int btrfs_write_out_cache(struct btrfs_root *root, return 0; } - last_index = (i_size_read(inode) - 1) >> PAGE_CACHE_SHIFT; + num_pages = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> + PAGE_CACHE_SHIFT; filemap_write_and_wait(inode->i_mapping); btrfs_wait_ordered_range(inode, inode->i_size & ~(root->sectorsize - 1), (u64)-1); /* We need a checksum per page. */ - num_checksums = i_size_read(inode) / PAGE_CACHE_SIZE; - crc = checksums = kzalloc(sizeof(u32) * num_checksums, GFP_NOFS); + crc = checksums = kzalloc(sizeof(u32) * num_pages, GFP_NOFS); if (!crc) { iput(inode); return 0; } + pages = kzalloc(sizeof(struct page *) * num_pages, GFP_NOFS); + if (!pages) { + kfree(crc); + iput(inode); + return 0; + } + /* Since the first page has all of our checksums and our generation we * need to calculate the offset into the page that we can start writing * our entries. */ - first_page_offset = (sizeof(u32) * num_checksums) + sizeof(u64); + first_page_offset = (sizeof(u32) * num_pages) + sizeof(u64); /* Get the cluster for this block_group if it exists */ if (!list_empty(&block_group->cluster_list)) @@ -590,20 +598,18 @@ int btrfs_write_out_cache(struct btrfs_root *root, * after find_get_page at this point. Just putting this here so people * know and don't freak out. */ - while (index <= last_index) { + while (index < num_pages) { page = grab_cache_page(inode->i_mapping, index); if (!page) { - pgoff_t i = 0; + int i; - while (i < index) { - page = find_get_page(inode->i_mapping, i); - unlock_page(page); - page_cache_release(page); - page_cache_release(page); - i++; + for (i = 0; i < num_pages; i++) { + unlock_page(pages[i]); + page_cache_release(pages[i]); } goto out_free; } + pages[index] = page; index++; } @@ -631,7 +637,12 @@ int btrfs_write_out_cache(struct btrfs_root *root, offset = start_offset; } - page = find_get_page(inode->i_mapping, index); + if (index >= num_pages) { + out_of_space = true; + break; + } + + page = pages[index]; addr = kmap(page); entry = addr + start_offset; @@ -708,23 +719,6 @@ int btrfs_write_out_cache(struct btrfs_root *root, bytes += PAGE_CACHE_SIZE; - ClearPageChecked(page); - set_page_extent_mapped(page); - SetPageUptodate(page); - set_page_dirty(page); - - /* - * We need to release our reference we got for grab_cache_page, - * except for the first page which will hold our checksums, we - * do that below. - */ - if (index != 0) { - unlock_page(page); - page_cache_release(page); - } - - page_cache_release(page); - index++; } while (node || next_page); @@ -734,6 +728,10 @@ int btrfs_write_out_cache(struct btrfs_root *root, struct btrfs_free_space *entry = list_entry(pos, struct btrfs_free_space, list); + if (index >= num_pages) { + out_of_space = true; + break; + } page = find_get_page(inode->i_mapping, index); addr = kmap(page); @@ -745,64 +743,58 @@ int btrfs_write_out_cache(struct btrfs_root *root, crc++; bytes += PAGE_CACHE_SIZE; - ClearPageChecked(page); - set_page_extent_mapped(page); - SetPageUptodate(page); - set_page_dirty(page); - unlock_page(page); - page_cache_release(page); - page_cache_release(page); list_del_init(&entry->list); index++; } + if (out_of_space) { + btrfs_drop_pages(pages, num_pages); + unlock_extent_cached(&BTRFS_I(inode)->io_tree, 0, + i_size_read(inode) - 1, &cached_state, + GFP_NOFS); + ret = 0; + goto out_free; + } + /* Zero out the rest of the pages just to make sure */ - while (index <= last_index) { + while (index < num_pages) { void *addr; - page = find_get_page(inode->i_mapping, index); - + page = pages[index]; addr = kmap(page); memset(addr, 0, PAGE_CACHE_SIZE); kunmap(page); - ClearPageChecked(page); - set_page_extent_mapped(page); - SetPageUptodate(page); - set_page_dirty(page); - unlock_page(page); - page_cache_release(page); - page_cache_release(page); bytes += PAGE_CACHE_SIZE; index++; } - btrfs_set_extent_delalloc(inode, 0, bytes - 1, &cached_state); - /* Write the checksums and trans id to the first page */ { void *addr; u64 *gen; - page = find_get_page(inode->i_mapping, 0); + page = pages[0]; addr = kmap(page); - memcpy(addr, checksums, sizeof(u32) * num_checksums); - gen = addr + (sizeof(u32) * num_checksums); + memcpy(addr, checksums, sizeof(u32) * num_pages); + gen = addr + (sizeof(u32) * num_pages); *gen = trans->transid; kunmap(page); - ClearPageChecked(page); - set_page_extent_mapped(page); - SetPageUptodate(page); - set_page_dirty(page); - unlock_page(page); - page_cache_release(page); - page_cache_release(page); } - BTRFS_I(inode)->generation = trans->transid; + ret = btrfs_dirty_pages(root, inode, pages, num_pages, 0, + bytes, &cached_state); + btrfs_drop_pages(pages, num_pages); unlock_extent_cached(&BTRFS_I(inode)->io_tree, 0, i_size_read(inode) - 1, &cached_state, GFP_NOFS); + if (ret) { + ret = 0; + goto out_free; + } + + BTRFS_I(inode)->generation = trans->transid; + filemap_write_and_wait(inode->i_mapping); key.objectid = BTRFS_FREE_SPACE_OBJECTID; @@ -853,6 +845,7 @@ out_free: BTRFS_I(inode)->generation = 0; } kfree(checksums); + kfree(pages); btrfs_update_inode(trans, root, inode); iput(inode); return ret; -- cgit v1.2.3-18-g5258 From 06d5a5899d6d3ac401d2359b5eac6d2a3a0fe331 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Tue, 5 Apr 2011 11:57:27 -0400 Subject: Btrfs: only retry transaction reservation once I saw a lockup where we kept getting into this start transaction->commit transaction loop because of enospce. The fact is if we fail to make our reservation, we've tried _everything_ several times, so we only need to try and commit the transaction once, and if that doesn't work then we really are out of space and need to just exit. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/transaction.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 5b158da7e0b..4583008217e 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -181,6 +181,7 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, { struct btrfs_trans_handle *h; struct btrfs_transaction *cur_trans; + int retries = 0; int ret; if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR) @@ -224,10 +225,18 @@ again: if (num_items > 0) { ret = btrfs_trans_reserve_metadata(h, root, num_items); - if (ret == -EAGAIN) { + if (ret == -EAGAIN && !retries) { + retries++; btrfs_commit_transaction(h, root); goto again; + } else if (ret == -EAGAIN) { + /* + * We have already retried and got EAGAIN, so really we + * don't have space, so set ret to -ENOSPC. + */ + ret = -ENOSPC; } + if (ret < 0) { btrfs_end_transaction(h, root); return ERR_PTR(ret); -- cgit v1.2.3-18-g5258 From 12ddb96cb6752218d8a1aeb696ec9b0ca7adb42f Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Tue, 5 Apr 2011 13:02:27 -0400 Subject: Btrfs: map the inode item when doing fill_inode_item Instead of calling kmap_atomic for every thing we set in the inode item, map the entire inode item at the start and unmap it at the end. This makes a sequential dd of 400mb O_DIRECT something like 1% faster. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/inode.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index cc6022842e0..da2680263d9 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -2589,6 +2589,13 @@ static void fill_inode_item(struct btrfs_trans_handle *trans, struct btrfs_inode_item *item, struct inode *inode) { + if (!leaf->map_token) + map_private_extent_buffer(leaf, (unsigned long)item, + sizeof(struct btrfs_inode_item), + &leaf->map_token, &leaf->kaddr, + &leaf->map_start, &leaf->map_len, + KM_USER1); + btrfs_set_inode_uid(leaf, item, inode->i_uid); btrfs_set_inode_gid(leaf, item, inode->i_gid); btrfs_set_inode_size(leaf, item, BTRFS_I(inode)->disk_i_size); @@ -2617,6 +2624,11 @@ static void fill_inode_item(struct btrfs_trans_handle *trans, btrfs_set_inode_rdev(leaf, item, inode->i_rdev); btrfs_set_inode_flags(leaf, item, BTRFS_I(inode)->flags); btrfs_set_inode_block_group(leaf, item, BTRFS_I(inode)->block_group); + + if (leaf->map_token) { + unmap_extent_buffer(leaf, leaf->map_token, KM_USER1); + leaf->map_token = NULL; + } } /* -- cgit v1.2.3-18-g5258 From 1ef30be142d2cc60e2687ef267de864cf31be995 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Tue, 5 Apr 2011 19:25:36 -0400 Subject: Btrfs: do not call btrfs_update_inode in endio if nothing changed In the DIO code we often don't update the i_disk_size because the i_size isn't updated until after the DIO is completed, so basically we are allocating a path, doing a search, and updating the inode item for no reason since nothing changed. btrfs_ordered_update_i_size will return 1 if it didn't update i_disk_size, so only run btrfs_update_inode if btrfs_ordered_update_i_size returns 0. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/inode.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index da2680263d9..4a238d676e5 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -1769,9 +1769,12 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end) add_pending_csums(trans, inode, ordered_extent->file_offset, &ordered_extent->list); - btrfs_ordered_update_i_size(inode, 0, ordered_extent); - ret = btrfs_update_inode(trans, root, inode); - BUG_ON(ret); + ret = btrfs_ordered_update_i_size(inode, 0, ordered_extent); + if (!ret) { + ret = btrfs_update_inode(trans, root, inode); + BUG_ON(ret); + } + ret = 0; out: if (nolock) { if (trans) @@ -5865,8 +5868,10 @@ again: } add_pending_csums(trans, inode, ordered->file_offset, &ordered->list); - btrfs_ordered_update_i_size(inode, 0, ordered); - btrfs_update_inode(trans, root, inode); + ret = btrfs_ordered_update_i_size(inode, 0, ordered); + if (!ret) + btrfs_update_inode(trans, root, inode); + ret = 0; out_unlock: unlock_extent_cached(&BTRFS_I(inode)->io_tree, ordered->file_offset, ordered->file_offset + ordered->len - 1, -- cgit v1.2.3-18-g5258 From 02f57c7aedef1a537f4b16db7061cdd8efa3bb4e Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Wed, 6 Apr 2011 14:25:44 -0400 Subject: Btrfs: don't split dio bios if we don't have to We have been unconditionally allocating a new bio and re-adding all pages from our original bio to the new bio. This is needed if our original bio is larger than our stripe size, but if it is smaller than the stripe size then there is no need to do this. So check the map length and if we are under that then go ahead and submit the original bio. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/inode.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 4a238d676e5..149c77fd1eb 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -6006,13 +6006,6 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip, int ret = 0; int write = rw & REQ_WRITE; - bio = btrfs_dio_bio_alloc(orig_bio->bi_bdev, start_sector, GFP_NOFS); - if (!bio) - return -ENOMEM; - bio->bi_private = dip; - bio->bi_end_io = btrfs_end_dio_bio; - atomic_inc(&dip->pending_bios); - map_length = orig_bio->bi_size; ret = btrfs_map_block(map_tree, READ, start_sector << 9, &map_length, NULL, 0); @@ -6021,6 +6014,18 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip, return -EIO; } + if (map_length >= orig_bio->bi_size) { + bio = orig_bio; + goto submit; + } + + bio = btrfs_dio_bio_alloc(orig_bio->bi_bdev, start_sector, GFP_NOFS); + if (!bio) + return -ENOMEM; + bio->bi_private = dip; + bio->bi_end_io = btrfs_end_dio_bio; + atomic_inc(&dip->pending_bios); + while (bvec <= (orig_bio->bi_io_vec + orig_bio->bi_vcnt - 1)) { if (unlikely(map_length < submit_len + bvec->bv_len || bio_add_page(bio, bvec->bv_page, bvec->bv_len, @@ -6071,6 +6076,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip, } } +submit: ret = __btrfs_submit_dio_bio(bio, inode, rw, file_offset, skip_sum, csums); if (!ret) -- cgit v1.2.3-18-g5258 From 1ae399382512b3e4d6c923e53da9e45935577040 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Wed, 6 Apr 2011 14:41:34 -0400 Subject: Btrfs: do not use async submit for small DIO io's When looking at our DIO performance Chris said that for small IO's doing the async submit stuff tends to be more overhead than it's worth. With this on top of my other fixes I get about a 17-20% speedup doing a sequential dd with 4k IO's. Basically if we don't have to split the bio for the map length it's small enough to be directly submitted, otherwise go back to the async submit. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/inode.c | 24 +++++++++++++++++++----- 1 file changed, 19 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 149c77fd1eb..2bb76c6157a 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -5957,7 +5957,7 @@ static struct bio *btrfs_dio_bio_alloc(struct block_device *bdev, static inline int __btrfs_submit_dio_bio(struct bio *bio, struct inode *inode, int rw, u64 file_offset, int skip_sum, - u32 *csums) + u32 *csums, int async_submit) { int write = rw & REQ_WRITE; struct btrfs_root *root = BTRFS_I(inode)->root; @@ -5968,13 +5968,24 @@ static inline int __btrfs_submit_dio_bio(struct bio *bio, struct inode *inode, if (ret) goto err; - if (write && !skip_sum) { + if (skip_sum) + goto map; + + if (write && async_submit) { ret = btrfs_wq_submit_bio(root->fs_info, inode, rw, bio, 0, 0, file_offset, __btrfs_submit_bio_start_direct_io, __btrfs_submit_bio_done); goto err; + } else if (write) { + /* + * If we aren't doing async submit, calculate the csum of the + * bio now. + */ + ret = btrfs_csum_one_bio(root, inode, bio, file_offset, 1); + if (ret) + goto err; } else if (!skip_sum) { ret = btrfs_lookup_bio_sums_dio(root, inode, bio, file_offset, csums); @@ -5982,7 +5993,8 @@ static inline int __btrfs_submit_dio_bio(struct bio *bio, struct inode *inode, goto err; } - ret = btrfs_map_bio(root, rw, bio, 0, 1); +map: + ret = btrfs_map_bio(root, rw, bio, 0, async_submit); err: bio_put(bio); return ret; @@ -6004,6 +6016,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip, int nr_pages = 0; u32 *csums = dip->csums; int ret = 0; + int async_submit = 0; int write = rw & REQ_WRITE; map_length = orig_bio->bi_size; @@ -6019,6 +6032,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip, goto submit; } + async_submit = 1; bio = btrfs_dio_bio_alloc(orig_bio->bi_bdev, start_sector, GFP_NOFS); if (!bio) return -ENOMEM; @@ -6039,7 +6053,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip, atomic_inc(&dip->pending_bios); ret = __btrfs_submit_dio_bio(bio, inode, rw, file_offset, skip_sum, - csums); + csums, async_submit); if (ret) { bio_put(bio); atomic_dec(&dip->pending_bios); @@ -6078,7 +6092,7 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip, submit: ret = __btrfs_submit_dio_bio(bio, inode, rw, file_offset, skip_sum, - csums); + csums, async_submit); if (!ret) return 0; -- cgit v1.2.3-18-g5258 From 16d299ac7446b5a75c5683a9ae11d7907d444c86 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Wed, 6 Apr 2011 14:53:07 -0400 Subject: Btrfs: reuse the extent_map we found when calling btrfs_get_extent In btrfs_get_block_direct we call btrfs_get_extent to lookup the extent for the range that we are looking for. If we don't find an extent, btrfs_get_extent will insert a extent_map for that area and mark it as a hole. So it does the job of allocating a new extent map and inserting it into the io tree. But if we're creating a new extent we free it up and redo all of that work. So instead pass the em to btrfs_new_extent_direct(), and if it will work just allocate the disk space and set it up properly and bypass the freeing/allocating of a new extent map and the expensive operation of inserting the thing into the io_tree. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/inode.c | 36 ++++++++++++++++++++++++++++-------- 1 file changed, 28 insertions(+), 8 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 2bb76c6157a..24310c9cb14 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -5445,17 +5445,30 @@ out: } static struct extent_map *btrfs_new_extent_direct(struct inode *inode, + struct extent_map *em, u64 start, u64 len) { struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_trans_handle *trans; - struct extent_map *em; struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; struct btrfs_key ins; u64 alloc_hint; int ret; + bool insert = false; - btrfs_drop_extent_cache(inode, start, start + len - 1, 0); + /* + * Ok if the extent map we looked up is a hole and is for the exact + * range we want, there is no reason to allocate a new one, however if + * it is not right then we need to free this one and drop the cache for + * our range. + */ + if (em->block_start != EXTENT_MAP_HOLE || em->start != start || + em->len != len) { + free_extent_map(em); + em = NULL; + insert = true; + btrfs_drop_extent_cache(inode, start, start + len - 1, 0); + } trans = btrfs_join_transaction(root, 0); if (IS_ERR(trans)) @@ -5471,10 +5484,12 @@ static struct extent_map *btrfs_new_extent_direct(struct inode *inode, goto out; } - em = alloc_extent_map(GFP_NOFS); if (!em) { - em = ERR_PTR(-ENOMEM); - goto out; + em = alloc_extent_map(GFP_NOFS); + if (!em) { + em = ERR_PTR(-ENOMEM); + goto out; + } } em->start = start; @@ -5484,9 +5499,15 @@ static struct extent_map *btrfs_new_extent_direct(struct inode *inode, em->block_start = ins.objectid; em->block_len = ins.offset; em->bdev = root->fs_info->fs_devices->latest_bdev; + + /* + * We need to do this because if we're using the original em we searched + * for, we could have EXTENT_FLAG_VACANCY set, and we don't want that. + */ + em->flags = 0; set_bit(EXTENT_FLAG_PINNED, &em->flags); - while (1) { + while (insert) { write_lock(&em_tree->lock); ret = add_extent_mapping(em_tree, em); write_unlock(&em_tree->lock); @@ -5704,8 +5725,7 @@ must_cow: * it above */ len = bh_result->b_size; - free_extent_map(em); - em = btrfs_new_extent_direct(inode, start, len); + em = btrfs_new_extent_direct(inode, em, start, len); if (IS_ERR(em)) return PTR_ERR(em); len = min(len, em->len - (start - em->start)); -- cgit v1.2.3-18-g5258 From 93a54bc4c28a125978cddbe2db9e347391e3522d Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Wed, 6 Apr 2011 15:11:44 -0400 Subject: Btrfs: check for duplicate iov_base's when doing dio reads Apparently it is ok to submit a read to an IDE device with the same target page for different offsets. This is what Windows does under qemu. The problem is under DIO we expect them to be different buffers for checksumming reasons, and so this sort of thing will result in checksum errors, when in reality the file is fine. So when reading, check to make sure that all iov bases are different, and if they aren't fall back to buffered mode, since that will work out right. Thanks, Signed-off-by: Josef Bacik --- fs/btrfs/inode.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 24310c9cb14..00d59c6a976 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -6207,6 +6207,7 @@ static ssize_t check_direct_IO(struct btrfs_root *root, int rw, struct kiocb *io unsigned long nr_segs) { int seg; + int i; size_t size; unsigned long addr; unsigned blocksize_mask = root->sectorsize - 1; @@ -6221,8 +6222,22 @@ static ssize_t check_direct_IO(struct btrfs_root *root, int rw, struct kiocb *io addr = (unsigned long)iov[seg].iov_base; size = iov[seg].iov_len; end += size; - if ((addr & blocksize_mask) || (size & blocksize_mask)) + if ((addr & blocksize_mask) || (size & blocksize_mask)) goto out; + + /* If this is a write we don't need to check anymore */ + if (rw & WRITE) + continue; + + /* + * Check to make sure we don't have duplicate iov_base's in this + * iovec, if so return EINVAL, otherwise we'll get csum errors + * when reading back. + */ + for (i = seg + 1; i < nr_segs; i++) { + if (iov[seg].iov_base == iov[i].iov_base) + goto out; + } } retval = 0; out: -- cgit v1.2.3-18-g5258 From e89c0d7090c54d7b11b9b091e495a1ae345dd3ff Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Tue, 5 Apr 2011 13:57:53 +0100 Subject: ARM: 6864/1: hw_breakpoint: clear DBGVCR out of reset The DBGVCR, used for configuring vector catch debug events, is UNKNOWN out of reset on ARMv7. When enabling monitor mode, this must be zeroed to avoid UNPREDICTABLE behaviour. This patch adds the zeroing code to the debug reset path. Cc: stable Reported-by: Stepan Moskovchenko Signed-off-by: Will Deacon Signed-off-by: Russell King --- arch/arm/kernel/hw_breakpoint.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c index 8dbc126f715..87acc25d7a3 100644 --- a/arch/arm/kernel/hw_breakpoint.c +++ b/arch/arm/kernel/hw_breakpoint.c @@ -868,6 +868,13 @@ static void reset_ctrl_regs(void *info) */ asm volatile("mcr p14, 0, %0, c1, c0, 4" : : "r" (0)); isb(); + + /* + * Clear any configured vector-catch events before + * enabling monitor mode. + */ + asm volatile("mcr p14, 0, %0, c0, c7, 0" : : "r" (0)); + isb(); } if (enable_monitor_mode()) -- cgit v1.2.3-18-g5258 From 6759788b944139793bffa889761cc3d8d703fdc0 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Tue, 5 Apr 2011 14:01:24 +0100 Subject: ARM: 6865/1: perf: ensure pass through zero is counted on overflow Commit a737823d ("ARM: perf: ensure overflows aren't missed due to IRQ latency") changed the way that event deltas are calculated on overflow so that we don't miss events when the new count value overtakes the previous one. Unfortunately, we forget to count the event that passes through zero so we end up being off by 1. This patch adds on the correction. Reported-by: Chris Moore Signed-off-by: Will Deacon Signed-off-by: Russell King --- arch/arm/kernel/perf_event.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 69cfee0fe00..979da3947f4 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -221,7 +221,7 @@ again: prev_raw_count &= armpmu->max_period; if (overflow) - delta = armpmu->max_period - prev_raw_count + new_raw_count; + delta = armpmu->max_period - prev_raw_count + new_raw_count + 1; else delta = new_raw_count - prev_raw_count; -- cgit v1.2.3-18-g5258 From 974508262e94b567f9d5b7ba1eef9fc493561f63 Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Wed, 6 Apr 2011 16:14:25 +0100 Subject: ARM: 6866/1: Do not restrict HIGHPTE to !OUTER_CACHE The HIGHPTE config option depends on !OUTER_CACHE. However, there is no set_pte_ext() function that does outer cache maintenance by physical address, hence no need for such restriction. Signed-off-by: Catalin Marinas Signed-off-by: Russell King --- arch/arm/Kconfig | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 9954c9bef67..e8cbecc60fb 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1540,7 +1540,6 @@ config HIGHMEM config HIGHPTE bool "Allocate 2nd-level pagetables from highmem" depends on HIGHMEM - depends on !OUTER_CACHE config HW_PERF_EVENTS bool "Enable hardware performance counter support for perf events" -- cgit v1.2.3-18-g5258 From 2e82669acf03e5bf2080f5d3ef005168e67d8a51 Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Wed, 6 Apr 2011 16:16:29 +0100 Subject: ARM: 6867/1: Introduce THREAD_NOTIFY_COPY for copy_thread() hooks This patch adds THREAD_NOTIFY_COPY for calling registered handlers during the copy_thread() function call. It also changes the VFP handler to use a switch statement rather than if..else and ignore this event. Signed-off-by: Catalin Marinas Signed-off-by: Russell King --- arch/arm/include/asm/thread_notify.h | 1 + arch/arm/kernel/process.c | 2 ++ arch/arm/vfp/vfpmodule.c | 22 +++++++++++++++------- 3 files changed, 18 insertions(+), 7 deletions(-) diff --git a/arch/arm/include/asm/thread_notify.h b/arch/arm/include/asm/thread_notify.h index c4391ba2035..1dc98067589 100644 --- a/arch/arm/include/asm/thread_notify.h +++ b/arch/arm/include/asm/thread_notify.h @@ -43,6 +43,7 @@ static inline void thread_notify(unsigned long rc, struct thread_info *thread) #define THREAD_NOTIFY_FLUSH 0 #define THREAD_NOTIFY_EXIT 1 #define THREAD_NOTIFY_SWITCH 2 +#define THREAD_NOTIFY_COPY 3 #endif #endif diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index 94bbedbed63..5e1e5419722 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -372,6 +372,8 @@ copy_thread(unsigned long clone_flags, unsigned long stack_start, if (clone_flags & CLONE_SETTLS) thread->tp_value = regs->ARM_r3; + thread_notify(THREAD_NOTIFY_COPY, thread); + return 0; } diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c index bbf3da012af..1c88bbdfd34 100644 --- a/arch/arm/vfp/vfpmodule.c +++ b/arch/arm/vfp/vfpmodule.c @@ -104,12 +104,17 @@ static void vfp_thread_exit(struct thread_info *thread) static int vfp_notifier(struct notifier_block *self, unsigned long cmd, void *v) { struct thread_info *thread = v; + u32 fpexc; +#ifdef CONFIG_SMP + unsigned int cpu; +#endif - if (likely(cmd == THREAD_NOTIFY_SWITCH)) { - u32 fpexc = fmrx(FPEXC); + switch (cmd) { + case THREAD_NOTIFY_SWITCH: + fpexc = fmrx(FPEXC); #ifdef CONFIG_SMP - unsigned int cpu = thread->cpu; + cpu = thread->cpu; /* * On SMP, if VFP is enabled, save the old state in @@ -134,13 +139,16 @@ static int vfp_notifier(struct notifier_block *self, unsigned long cmd, void *v) * old state. */ fmxr(FPEXC, fpexc & ~FPEXC_EN); - return NOTIFY_DONE; - } + break; - if (cmd == THREAD_NOTIFY_FLUSH) + case THREAD_NOTIFY_FLUSH: vfp_thread_flush(thread); - else + break; + + case THREAD_NOTIFY_EXIT: vfp_thread_exit(thread); + break; + } return NOTIFY_DONE; } -- cgit v1.2.3-18-g5258 From c98c09773d80db93cae349f0496fef109feab54d Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Wed, 6 Apr 2011 16:17:17 +0100 Subject: ARM: 6868/1: Preserve the VFP state during fork VFP registers d16-d31 are callee saved registers and must be preserved during function calls, including fork(). The VFP configuration should also be preserved. The patch copies the full VFP state to the child process. Reported-by: Paul Wright Signed-off-by: Catalin Marinas Signed-off-by: Russell King --- arch/arm/vfp/vfpmodule.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c index 1c88bbdfd34..f74695075e6 100644 --- a/arch/arm/vfp/vfpmodule.c +++ b/arch/arm/vfp/vfpmodule.c @@ -78,6 +78,14 @@ static void vfp_thread_exit(struct thread_info *thread) put_cpu(); } +static void vfp_thread_copy(struct thread_info *thread) +{ + struct thread_info *parent = current_thread_info(); + + vfp_sync_hwstate(parent); + thread->vfpstate = parent->vfpstate; +} + /* * When this function is called with the following 'cmd's, the following * is true while this function is being run: @@ -148,6 +156,10 @@ static int vfp_notifier(struct notifier_block *self, unsigned long cmd, void *v) case THREAD_NOTIFY_EXIT: vfp_thread_exit(thread); break; + + case THREAD_NOTIFY_COPY: + vfp_thread_copy(thread); + break; } return NOTIFY_DONE; -- cgit v1.2.3-18-g5258 From aec995900fbc8cffa9f0f9e797ef07a0beb2b079 Mon Sep 17 00:00:00 2001 From: "Justin P. Mattock" Date: Fri, 8 Apr 2011 16:46:12 +0100 Subject: ARM: 6872/1: arch:common:Makefile Remove unused config in the Makefile. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The patch below removes an unused config variable found by using a kernel cleanup script. Signed-off-by: Justin P. Mattock Acked-by: Uwe Kleine-König Acked-by: Jean-Christophe PLAGNIOL-VILLARD Signed-off-by: Russell King --- arch/arm/common/Makefile | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile index e7521bca2c3..6ea9b6f3607 100644 --- a/arch/arm/common/Makefile +++ b/arch/arm/common/Makefile @@ -16,5 +16,4 @@ obj-$(CONFIG_SHARP_SCOOP) += scoop.o obj-$(CONFIG_ARCH_IXP2000) += uengine.o obj-$(CONFIG_ARCH_IXP23XX) += uengine.o obj-$(CONFIG_PCI_HOST_ITE8152) += it8152.o -obj-$(CONFIG_COMMON_CLKDEV) += clkdev.o obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o -- cgit v1.2.3-18-g5258 From e566b76ed30768140df8f0023904aed5a41244f7 Mon Sep 17 00:00:00 2001 From: Stephane Eranian Date: Wed, 6 Apr 2011 02:54:54 +0200 Subject: perf_event: Fix cgrp event scheduling bug in perf_enable_on_exec() There is a bug in perf_event_enable_on_exec() when cgroup events are active on a CPU: the cgroup events may be scheduled twice causing event state corruptions which eventually may lead to kernel panics. The reason is that the function needs to first schedule out the cgroup events, just like for the per-thread events. The cgroup event are scheduled back in automatically from the perf_event_context_sched_in() function. The patch also adds a WARN_ON_ONCE() is perf_cgroup_switch() to catch any bogus state. Signed-off-by: Stephane Eranian Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/20110406005454.GA1062@quad Signed-off-by: Ingo Molnar --- kernel/perf_event.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 27960f114ef..8e81a9860a0 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -364,6 +364,7 @@ void perf_cgroup_switch(struct task_struct *task, int mode) } if (mode & PERF_CGROUP_SWIN) { + WARN_ON_ONCE(cpuctx->cgrp); /* set cgrp before ctxsw in to * allow event_filter_match() to not * have to pass task around @@ -2423,6 +2424,14 @@ static void perf_event_enable_on_exec(struct perf_event_context *ctx) if (!ctx || !ctx->nr_events) goto out; + /* + * We must ctxsw out cgroup events to avoid conflict + * when invoking perf_task_event_sched_in() later on + * in this function. Otherwise we end up trying to + * ctxswin cgroup events which are already scheduled + * in. + */ + perf_cgroup_sched_out(current); task_ctx_sched_out(ctx, EVENT_ALL); raw_spin_lock(&ctx->lock); @@ -2447,6 +2456,9 @@ static void perf_event_enable_on_exec(struct perf_event_context *ctx) raw_spin_unlock(&ctx->lock); + /* + * Also calls ctxswin for cgroup events, if any: + */ perf_event_context_sched_in(ctx, ctx->task); out: local_irq_restore(flags); -- cgit v1.2.3-18-g5258 From 109b81296c63228578d4760794d8dd46e02eddfb Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Mon, 11 Apr 2011 14:13:10 +0200 Subject: block: splice plug list to local context If the request_fn ends up blocking, we could be re-entering the plug flush. Since the list is protected by explicitly not allowing schedule events, this isn't a terribly good idea. Additionally, it can cause us to recurse. As request_fn called by __blk_run_queue is allowed to 'schedule()' (after dropping the queue lock of course), it is possible to get a recursive call: schedule -> blk_flush_plug -> __blk_finish_plug -> flush_plug_list -> __blk_run_queue -> request_fn -> schedule We must make sure that the second schedule does not call into blk_flush_plug again. So instead of leaving the list of requests on blk_plug->list, move them to a separate list leaving blk_plug->list empty. Signed-off-by: Jens Axboe --- block/blk-core.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index 90f22cc3079..eeaca0998df 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -2673,19 +2673,24 @@ static void flush_plug_list(struct blk_plug *plug) struct request_queue *q; unsigned long flags; struct request *rq; + LIST_HEAD(list); BUG_ON(plug->magic != PLUG_MAGIC); if (list_empty(&plug->list)) return; - if (plug->should_sort) - list_sort(NULL, &plug->list, plug_rq_cmp); + list_splice_init(&plug->list, &list); + + if (plug->should_sort) { + list_sort(NULL, &list, plug_rq_cmp); + plug->should_sort = 0; + } q = NULL; local_irq_save(flags); - while (!list_empty(&plug->list)) { - rq = list_entry_rq(plug->list.next); + while (!list_empty(&list)) { + rq = list_entry_rq(list.next); list_del_init(&rq->queuelist); BUG_ON(!(rq->cmd_flags & REQ_ON_PLUG)); BUG_ON(!rq->q); @@ -2713,7 +2718,6 @@ static void flush_plug_list(struct blk_plug *plug) spin_unlock(q->queue_lock); } - BUG_ON(!list_empty(&plug->list)); local_irq_restore(flags); } -- cgit v1.2.3-18-g5258 From 30d746c68025ee69ac17219aacc9b1614d951f01 Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Thu, 7 Apr 2011 14:13:15 +0200 Subject: x86/ce4100: Add reg property to bridges without the reg property Ben's new code won't find the PCI & ISA bridge and the devices won't get the DT-node attached. Signed-off-by: Sebastian Andrzej Siewior Acked-by: Thomas Gleixner Cc: davem@davemloft.net Cc: monstr@monstr.eu Cc: Benjamin Herrenschmidt Link: http://lkml.kernel.org/r/20110407121315.GA9204@linutronix.de Signed-off-by: Ingo Molnar --- arch/x86/platform/ce4100/falconfalls.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/platform/