From b3b77c8caef1750ebeea1054e39e358550ea9f55 Mon Sep 17 00:00:00 2001 From: Joakim Tjernlund Date: Mon, 24 May 2010 14:33:01 -0700 Subject: endian: #define __BYTE_ORDER Linux does not define __BYTE_ORDER in its endian header files which makes some header files bend backwards to get at the current endian. Lets #define __BYTE_ORDER in big_endian.h/litte_endian.h to make it easier for header files that are used in user space too. In userspace the convention is that 1. _both_ __LITTLE_ENDIAN and __BIG_ENDIAN are defined, 2. you have to test for e.g. __BYTE_ORDER == __BIG_ENDIAN. Signed-off-by: Joakim Tjernlund Cc: Geert Uytterhoeven Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/s390/include/asm/sfp-util.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/sfp-util.h b/arch/s390/include/asm/sfp-util.h index 0addc6466d9..7d43fee17e3 100644 --- a/arch/s390/include/asm/sfp-util.h +++ b/arch/s390/include/asm/sfp-util.h @@ -73,5 +73,3 @@ extern unsigned long __udiv_qrnnd (unsigned int *, unsigned int, #define UDIV_NEEDS_NORMALIZATION 0 #define abort() return 0 - -#define __BYTE_ORDER __BIG_ENDIAN -- cgit v1.2.3-18-g5258 From 13da9e200fe4740b02cd51e07ab454627e228920 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 26 May 2010 08:30:15 -0700 Subject: Revert "endian: #define __BYTE_ORDER" This reverts commit b3b77c8caef1750ebeea1054e39e358550ea9f55, which was also totally broken (see commit 0d2daf5cc858 that reverted the crc32 version of it). As reported by Stephen Rothwell, it causes problems on big-endian machines: > In file included from fs/jfs/jfs_types.h:33, > from fs/jfs/jfs_incore.h:26, > from fs/jfs/file.c:22: > fs/jfs/endian24.h:36:101: warning: "__LITTLE_ENDIAN" is not defined The kernel has never had that crazy "__BYTE_ORDER == __LITTLE_ENDIAN" model. It's not how we do things, and it isn't how we _should_ do things. So don't go there. Requested-by: Stephen Rothwell Signed-off-by: Linus Torvalds --- arch/s390/include/asm/sfp-util.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/sfp-util.h b/arch/s390/include/asm/sfp-util.h index 7d43fee17e3..0addc6466d9 100644 --- a/arch/s390/include/asm/sfp-util.h +++ b/arch/s390/include/asm/sfp-util.h @@ -73,3 +73,5 @@ extern unsigned long __udiv_qrnnd (unsigned int *, unsigned int, #define UDIV_NEEDS_NORMALIZATION 0 #define abort() return 0 + +#define __BYTE_ORDER __BIG_ENDIAN -- cgit v1.2.3-18-g5258 From 1ef6acf597559fd1c244190512144c40619299bf Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 26 May 2010 23:26:17 +0200 Subject: [S390] cmm: fix crash on module unload There might be a scheduled cmm_timer if the cmm module gets unloaded. That timer was not deleted during module unload and thus could lead to system crash later on. Besides that reorder function calls in module init and exit code to avoid a couple of other races which could lead to accesses to uninitialized data. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/mm/cmm.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c index f87b34731e1..c17352634a4 100644 --- a/arch/s390/mm/cmm.c +++ b/arch/s390/mm/cmm.c @@ -53,8 +53,8 @@ static struct cmm_page_array *cmm_timed_page_list; static DEFINE_SPINLOCK(cmm_lock); static struct task_struct *cmm_thread_ptr; -static wait_queue_head_t cmm_thread_wait; -static struct timer_list cmm_timer; +static DECLARE_WAIT_QUEUE_HEAD(cmm_thread_wait); +static DEFINE_TIMER(cmm_timer, NULL, 0, 0); static void cmm_timer_fn(unsigned long); static void cmm_set_timer(void); @@ -466,8 +466,6 @@ cmm_init (void) rc = register_pm_notifier(&cmm_power_notifier); if (rc) goto out_pm; - init_waitqueue_head(&cmm_thread_wait); - init_timer(&cmm_timer); cmm_thread_ptr = kthread_run(cmm_thread, NULL, "cmmthread"); rc = IS_ERR(cmm_thread_ptr) ? PTR_ERR(cmm_thread_ptr) : 0; if (rc) @@ -487,23 +485,25 @@ out_smsg: unregister_sysctl_table(cmm_sysctl_header); out_sysctl: #endif + del_timer_sync(&cmm_timer); return rc; } static void cmm_exit(void) { - kthread_stop(cmm_thread_ptr); - unregister_pm_notifier(&cmm_power_notifier); - unregister_oom_notifier(&cmm_oom_nb); - cmm_free_pages(cmm_pages, &cmm_pages, &cmm_page_list); - cmm_free_pages(cmm_timed_pages, &cmm_timed_pages, &cmm_timed_page_list); #ifdef CONFIG_CMM_PROC unregister_sysctl_table(cmm_sysctl_header); #endif #ifdef CONFIG_CMM_IUCV smsg_unregister_callback(SMSG_PREFIX, cmm_smsg_target); #endif + unregister_pm_notifier(&cmm_power_notifier); + unregister_oom_notifier(&cmm_oom_nb); + kthread_stop(cmm_thread_ptr); + del_timer_sync(&cmm_timer); + cmm_free_pages(cmm_pages, &cmm_pages, &cmm_page_list); + cmm_free_pages(cmm_timed_pages, &cmm_timed_pages, &cmm_timed_page_list); } module_init(cmm_init); -- cgit v1.2.3-18-g5258 From 2ddb3ec41495c2f4535d1e72e21e25870117f848 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 26 May 2010 23:26:18 +0200 Subject: [S390] atomic: implement atomic64_dec_if_positive Implement atomic64_dec_if_positive and add missing system.h header include. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/atomic.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/atomic.h b/arch/s390/include/asm/atomic.h index 451bfbb9db3..76daea11718 100644 --- a/arch/s390/include/asm/atomic.h +++ b/arch/s390/include/asm/atomic.h @@ -15,6 +15,7 @@ #include #include +#include #define ATOMIC_INIT(i) { (i) } @@ -274,6 +275,7 @@ static inline void atomic64_clear_mask(unsigned long long mask, atomic64_t *v) static inline int atomic64_add_unless(atomic64_t *v, long long a, long long u) { long long c, old; + c = atomic64_read(v); for (;;) { if (unlikely(c == u)) @@ -286,6 +288,23 @@ static inline int atomic64_add_unless(atomic64_t *v, long long a, long long u) return c != u; } +static inline long long atomic64_dec_if_positive(atomic64_t *v) +{ + long long c, old, dec; + + c = atomic64_read(v); + for (;;) { + dec = c - 1; + if (unlikely(dec < 0)) + break; + old = atomic64_cmpxchg((v), c, dec); + if (likely(old == c)) + break; + c = old; + } + return dec; +} + #define atomic64_add(_i, _v) atomic64_add_return(_i, _v) #define atomic64_add_negative(_i, _v) (atomic64_add_return(_i, _v) < 0) #define atomic64_inc(_v) atomic64_add_return(1, _v) -- cgit v1.2.3-18-g5258 From 215b3096371907e5d866bb219be7ef3d5ce6c083 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 26 May 2010 23:26:19 +0200 Subject: [S390] spp: fix compilation for CONFIG_32BIT Fix build breakage for CONFIG_32BIT caused by cd3b70f5 "[S390] virtualization aware cpu measurement" Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/asm-offsets.c | 4 ++-- arch/s390/kernel/setup.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c index d9b490a2716..5232278d79a 100644 --- a/arch/s390/kernel/asm-offsets.c +++ b/arch/s390/kernel/asm-offsets.c @@ -132,8 +132,6 @@ int main(void) DEFINE(__LC_MCCK_CLOCK, offsetof(struct _lowcore, mcck_clock)); DEFINE(__LC_MACHINE_FLAGS, offsetof(struct _lowcore, machine_flags)); DEFINE(__LC_FTRACE_FUNC, offsetof(struct _lowcore, ftrace_func)); - DEFINE(__LC_SIE_HOOK, offsetof(struct _lowcore, sie_hook)); - DEFINE(__LC_CMF_HPP, offsetof(struct _lowcore, cmf_hpp)); DEFINE(__LC_IRB, offsetof(struct _lowcore, irb)); DEFINE(__LC_CPU_TIMER_SAVE_AREA, offsetof(struct _lowcore, cpu_timer_save_area)); DEFINE(__LC_CLOCK_COMP_SAVE_AREA, offsetof(struct _lowcore, clock_comp_save_area)); @@ -154,6 +152,8 @@ int main(void) DEFINE(__LC_FP_CREG_SAVE_AREA, offsetof(struct _lowcore, fpt_creg_save_area)); DEFINE(__LC_LAST_BREAK, offsetof(struct _lowcore, breaking_event_addr)); DEFINE(__LC_VDSO_PER_CPU, offsetof(struct _lowcore, vdso_per_cpu_data)); + DEFINE(__LC_SIE_HOOK, offsetof(struct _lowcore, sie_hook)); + DEFINE(__LC_CMF_HPP, offsetof(struct _lowcore, cmf_hpp)); #endif /* CONFIG_32BIT */ return 0; } diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 7d893248d26..c8e8e1354e1 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -401,7 +401,6 @@ setup_lowcore(void) lc->io_new_psw.mask = psw_kernel_bits; lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler; lc->clock_comparator = -1ULL; - lc->cmf_hpp = -1ULL; lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE; lc->async_stack = (unsigned long) __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE; @@ -418,6 +417,7 @@ setup_lowcore(void) __ctl_set_bit(14, 29); } #else + lc->cmf_hpp = -1ULL; lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; #endif lc->sync_enter_timer = S390_lowcore.sync_enter_timer; -- cgit v1.2.3-18-g5258 From bac9f154acd175afdf702cb7d7f5de1254b4b119 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 26 May 2010 23:26:20 +0200 Subject: [S390] kprobes: forbid probing of stnsm/stosm/epsw The probed instructions will be executed in a single stepped and irq disabled context. Therefore the results of stnsm, stosm and epsw would be wrong if probed. So let's just disallow probing of these functions. If really needed a fixup could be written for each of them, but I doubt it's worth it. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/kprobes.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/s390') diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c index 3d34eef5a2c..2a3d2bf6f08 100644 --- a/arch/s390/kernel/kprobes.c +++ b/arch/s390/kernel/kprobes.c @@ -63,6 +63,8 @@ int __kprobes is_prohibited_opcode(kprobe_opcode_t *instruction) case 0x0b: /* bsm */ case 0x83: /* diag */ case 0x44: /* ex */ + case 0xac: /* stnsm */ + case 0xad: /* stosm */ return -EINVAL; } switch (*(__u16 *) instruction) { @@ -72,6 +74,7 @@ int __kprobes is_prohibited_opcode(kprobe_opcode_t *instruction) case 0xb258: /* bsg */ case 0xb218: /* pc */ case 0xb228: /* pt */ + case 0xb98d: /* epsw */ return -EINVAL; } return 0; -- cgit v1.2.3-18-g5258 From 2ffbb3f61e5b2648128f82fe7e506290702a9215 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 26 May 2010 23:26:21 +0200 Subject: [S390] spp: remove KVM_AWARE_CMF config option This config option enables or disables three single instructions which aren't expensive. This is too fine grained. Besided that everybody who uses kvm would enable it anyway in order to debug performance problems. Just remove it. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/entry64.S | 2 +- arch/s390/kvm/Kconfig | 11 ----------- arch/s390/kvm/sie64a.S | 4 +--- 3 files changed, 2 insertions(+), 15 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S index 178d92536d9..e7192e1cb67 100644 --- a/arch/s390/kernel/entry64.S +++ b/arch/s390/kernel/entry64.S @@ -65,7 +65,7 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \ ltgr %r3,%r3 jz 0f basr %r14,%r3 - 0: +0: #endif .endm diff --git a/arch/s390/kvm/Kconfig b/arch/s390/kvm/Kconfig index 2f4b687cc7f..a7251580891 100644 --- a/arch/s390/kvm/Kconfig +++ b/arch/s390/kvm/Kconfig @@ -33,17 +33,6 @@ config KVM If unsure, say N. -config KVM_AWARE_CMF - depends on KVM - bool "KVM aware sampling" - ---help--- - This option enhances the sampling data from the CPU Measurement - Facility with additional information, that allows to distinguish - guest(s) and host when using the kernel based virtual machine - functionality. - - If unsure, say N. - # OK, it's a little counter-intuitive to do this, but it puts it neatly under # the virtualization menu. source drivers/vhost/Kconfig diff --git a/arch/s390/kvm/sie64a.S b/arch/s390/kvm/sie64a.S index 31646bd0e46..7e9d30d567b 100644 --- a/arch/s390/kvm/sie64a.S +++ b/arch/s390/kvm/sie64a.S @@ -32,12 +32,10 @@ SPI_PSW = STACK_FRAME_OVERHEAD + __PT_PSW .macro SPP newpp -#ifdef CONFIG_KVM_AWARE_CMF tm __LC_MACHINE_FLAGS+6,0x20 # MACHINE_FLAG_SPP jz 0f .insn s,0xb2800000,\newpp - 0: -#endif +0: .endm sie_irq_handler: -- cgit v1.2.3-18-g5258 From 094f2100d6bb16ef0c4f82167cc55173ca22ee93 Mon Sep 17 00:00:00 2001 From: Michael Ernst Date: Wed, 26 May 2010 23:27:08 +0200 Subject: [S390] cio: unit check handling during internal I/O Send unit checks that occur during internal I/O to the device driver and react according to its return code. Signed-off-by: Michael Ernst Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/ccwdev.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/ccwdev.h b/arch/s390/include/asm/ccwdev.h index f4bd346a52d..1c0030f9b89 100644 --- a/arch/s390/include/asm/ccwdev.h +++ b/arch/s390/include/asm/ccwdev.h @@ -91,6 +91,14 @@ struct ccw_device { void (*handler) (struct ccw_device *, unsigned long, struct irb *); }; +/* + * Possible CIO actions triggered by the unit check handler. + */ +enum uc_todo { + UC_TODO_RETRY, + UC_TODO_RETRY_ON_NEW_PATH, + UC_TODO_STOP +}; /** * struct ccw driver - device driver for channel attached devices @@ -107,6 +115,7 @@ struct ccw_device { * @freeze: callback for freezing during hibernation snapshotting * @thaw: undo work done in @freeze * @restore: callback for restoring after hibernation + * @uc_handler: callback for unit check handler * @driver: embedded device driver structure * @name: device driver name */ @@ -124,6 +133,7 @@ struct ccw_driver { int (*freeze)(struct ccw_device *); int (*thaw) (struct ccw_device *); int (*restore)(struct ccw_device *); + enum uc_todo (*uc_handler) (struct ccw_device *, struct irb *); struct device_driver driver; char *name; }; -- cgit v1.2.3-18-g5258 From db705e831ae33fbbeeacf4bb527e0b17de3d6e68 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 26 May 2010 23:27:10 +0200 Subject: [S390] cmm: remove superfluous EXPORT_SYMBOLs plus cleanups Remove superfluous EXPORT_SYMBOLS and do coding style cleanup while being at it. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/mm/cmm.c | 82 +++++++++++++++++++----------------------------------- 1 file changed, 29 insertions(+), 53 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c index c17352634a4..fb584aa5c2c 100644 --- a/arch/s390/mm/cmm.c +++ b/arch/s390/mm/cmm.c @@ -1,11 +1,9 @@ /* - * arch/s390/mm/cmm.c + * Collaborative memory management interface. * - * S390 version - * Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation - * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) + * Copyright IBM Corp 2003,2010 + * Author(s): Martin Schwidefsky , * - * Collaborative memory management interface. */ #include @@ -20,9 +18,9 @@ #include #include #include +#include #include -#include #include static char *sender = "VMRMSVM"; @@ -59,8 +57,8 @@ static DEFINE_TIMER(cmm_timer, NULL, 0, 0); static void cmm_timer_fn(unsigned long); static void cmm_set_timer(void); -static long -cmm_alloc_pages(long nr, long *counter, struct cmm_page_array **list) +static long cmm_alloc_pages(long nr, long *counter, + struct cmm_page_array **list) { struct cmm_page_array *pa, *npa; unsigned long addr; @@ -99,8 +97,7 @@ cmm_alloc_pages(long nr, long *counter, struct cmm_page_array **list) return nr; } -static long -cmm_free_pages(long nr, long *counter, struct cmm_page_array **list) +static long cmm_free_pages(long nr, long *counter, struct cmm_page_array **list) { struct cmm_page_array *pa; unsigned long addr; @@ -140,11 +137,10 @@ static int cmm_oom_notify(struct notifier_block *self, } static struct notifier_block cmm_oom_nb = { - .notifier_call = cmm_oom_notify + .notifier_call = cmm_oom_notify, }; -static int -cmm_thread(void *dummy) +static int cmm_thread(void *dummy) { int rc; @@ -170,7 +166,7 @@ cmm_thread(void *dummy) cmm_timed_pages_target = cmm_timed_pages; } else if (cmm_timed_pages_target < cmm_timed_pages) { cmm_free_pages(1, &cmm_timed_pages, - &cmm_timed_page_list); + &cmm_timed_page_list); } if (cmm_timed_pages > 0 && !timer_pending(&cmm_timer)) cmm_set_timer(); @@ -178,14 +174,12 @@ cmm_thread(void *dummy) return 0; } -static void -cmm_kick_thread(void) +static void cmm_kick_thread(void) { wake_up(&cmm_thread_wait); } -static void -cmm_set_timer(void) +static void cmm_set_timer(void) { if (cmm_timed_pages_target <= 0 || cmm_timeout_seconds <= 0) { if (timer_pending(&cmm_timer)) @@ -202,8 +196,7 @@ cmm_set_timer(void) add_timer(&cmm_timer); } -static void -cmm_timer_fn(unsigned long ignored) +static void cmm_timer_fn(unsigned long ignored) { long nr; @@ -216,46 +209,41 @@ cmm_timer_fn(unsigned long ignored) cmm_set_timer(); } -void -cmm_set_pages(long nr) +static void cmm_set_pages(long nr) { cmm_pages_target = nr; cmm_kick_thread(); } -long -cmm_get_pages(void) +static long cmm_get_pages(void) { return cmm_pages; } -void -cmm_add_timed_pages(long nr) +static void cmm_add_timed_pages(long nr) { cmm_timed_pages_target += nr; cmm_kick_thread(); } -long -cmm_get_timed_pages(void) +static long cmm_get_timed_pages(void) { return cmm_timed_pages; } -void -cmm_set_timeout(long nr, long seconds) +static void cmm_set_timeout(long nr, long seconds) { cmm_timeout_pages = nr; cmm_timeout_seconds = seconds; cmm_set_timer(); } -static int -cmm_skip_blanks(char *cp, char **endp) +static int cmm_skip_blanks(char *cp, char **endp) { char *str; - for (str = cp; *str == ' ' || *str == '\t'; str++); + for (str = cp; *str == ' ' || *str == '\t'; str++) + ; *endp = str; return str != cp; } @@ -264,9 +252,8 @@ cmm_skip_blanks(char *cp, char **endp) static struct ctl_table cmm_table[]; -static int -cmm_pages_handler(ctl_table *ctl, int write, - void __user *buffer, size_t *lenp, loff_t *ppos) +static int cmm_pages_handler(ctl_table *ctl, int write, void __user *buffer, + size_t *lenp, loff_t *ppos) { char buf[16], *p; long nr; @@ -305,9 +292,8 @@ cmm_pages_handler(ctl_table *ctl, int write, return 0; } -static int -cmm_timeout_handler(ctl_table *ctl, int write, - void __user *buffer, size_t *lenp, loff_t *ppos) +static int cmm_timeout_handler(ctl_table *ctl, int write, void __user *buffer, + size_t *lenp, loff_t *ppos) { char buf[64], *p; long nr, seconds; @@ -374,8 +360,7 @@ static struct ctl_table cmm_dir_table[] = { #ifdef CONFIG_CMM_IUCV #define SMSG_PREFIX "CMM" -static void -cmm_smsg_target(const char *from, char *msg) +static void cmm_smsg_target(const char *from, char *msg) { long nr, seconds; @@ -445,8 +430,7 @@ static struct notifier_block cmm_power_notifier = { .notifier_call = cmm_power_event, }; -static int -cmm_init (void) +static int cmm_init(void) { int rc = -ENOMEM; @@ -488,9 +472,9 @@ out_sysctl: del_timer_sync(&cmm_timer); return rc; } +module_init(cmm_init); -static void -cmm_exit(void) +static void cmm_exit(void) { #ifdef CONFIG_CMM_PROC unregister_sysctl_table(cmm_sysctl_header); @@ -505,14 +489,6 @@ cmm_exit(void) cmm_free_pages(cmm_pages, &cmm_pages, &cmm_page_list); cmm_free_pages(cmm_timed_pages, &cmm_timed_pages, &cmm_timed_page_list); } - -module_init(cmm_init); module_exit(cmm_exit); -EXPORT_SYMBOL(cmm_set_pages); -EXPORT_SYMBOL(cmm_get_pages); -EXPORT_SYMBOL(cmm_add_timed_pages); -EXPORT_SYMBOL(cmm_get_timed_pages); -EXPORT_SYMBOL(cmm_set_timeout); - MODULE_LICENSE("GPL"); -- cgit v1.2.3-18-g5258 From cf9daf4a735acaa5ff5967bb1b3a5e3b3578c32a Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 26 May 2010 23:27:11 +0200 Subject: [S390] cmm: get rid of CMM_PROC config option All distros have this option switched on, so lets get rid of at least one of the tons of config options that are available. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/Kconfig | 7 ------- arch/s390/mm/cmm.c | 9 --------- 2 files changed, 16 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 79d0ca08682..149c9d8208d 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -479,13 +479,6 @@ config CMM Everybody who wants to run Linux under VM should select this option. -config CMM_PROC - bool "/proc interface to cooperative memory management" - depends on CMM - help - Select this option to enable the /proc interface to the - cooperative memory management. - config CMM_IUCV bool "IUCV special message interface to cooperative memory management" depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c index fb584aa5c2c..eb6a2ef5f82 100644 --- a/arch/s390/mm/cmm.c +++ b/arch/s390/mm/cmm.c @@ -248,8 +248,6 @@ static int cmm_skip_blanks(char *cp, char **endp) return str != cp; } -#ifdef CONFIG_CMM_PROC - static struct ctl_table cmm_table[]; static int cmm_pages_handler(ctl_table *ctl, int write, void __user *buffer, @@ -356,7 +354,6 @@ static struct ctl_table cmm_dir_table[] = { }, { } }; -#endif #ifdef CONFIG_CMM_IUCV #define SMSG_PREFIX "CMM" @@ -434,11 +431,9 @@ static int cmm_init(void) { int rc = -ENOMEM; -#ifdef CONFIG_CMM_PROC cmm_sysctl_header = register_sysctl_table(cmm_dir_table); if (!cmm_sysctl_header) goto out_sysctl; -#endif #ifdef CONFIG_CMM_IUCV rc = smsg_register_callback(SMSG_PREFIX, cmm_smsg_target); if (rc < 0) @@ -465,10 +460,8 @@ out_oom_notify: smsg_unregister_callback(SMSG_PREFIX, cmm_smsg_target); out_smsg: #endif -#ifdef CONFIG_CMM_PROC unregister_sysctl_table(cmm_sysctl_header); out_sysctl: -#endif del_timer_sync(&cmm_timer); return rc; } @@ -476,9 +469,7 @@ module_init(cmm_init); static void cmm_exit(void) { -#ifdef CONFIG_CMM_PROC unregister_sysctl_table(cmm_sysctl_header); -#endif #ifdef CONFIG_CMM_IUCV smsg_unregister_callback(SMSG_PREFIX, cmm_smsg_target); #endif -- cgit v1.2.3-18-g5258 From cdf566498d80709dedab826d068a9ea9d438320a Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 26 May 2010 23:27:12 +0200 Subject: [S390] Add support for LZO-compressed kernels. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/Kconfig | 1 + arch/s390/boot/compressed/Makefile | 5 ++++- arch/s390/boot/compressed/misc.c | 4 ++++ 3 files changed, 9 insertions(+), 1 deletion(-) (limited to 'arch/s390') diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 149c9d8208d..bee1c0f794c 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -102,6 +102,7 @@ config S390 select HAVE_KERNEL_GZIP select HAVE_KERNEL_BZIP2 select HAVE_KERNEL_LZMA + select HAVE_KERNEL_LZO select ARCH_INLINE_SPIN_TRYLOCK select ARCH_INLINE_SPIN_TRYLOCK_BH select ARCH_INLINE_SPIN_LOCK diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile index 6e4a67ad07e..1c999f726a5 100644 --- a/arch/s390/boot/compressed/Makefile +++ b/arch/s390/boot/compressed/Makefile @@ -7,7 +7,7 @@ BITS := $(if $(CONFIG_64BIT),64,31) targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 \ - vmlinux.bin.lzma misc.o piggy.o sizes.h head$(BITS).o + vmlinux.bin.lzma vmlinux.bin.lzo misc.o piggy.o sizes.h head$(BITS).o KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2 KBUILD_CFLAGS += $(cflags-y) @@ -47,6 +47,7 @@ vmlinux.bin.all-y := $(obj)/vmlinux.bin suffix-$(CONFIG_KERNEL_GZIP) := gz suffix-$(CONFIG_KERNEL_BZIP2) := bz2 suffix-$(CONFIG_KERNEL_LZMA) := lzma +suffix-$(CONFIG_KERNEL_LZO) := lzo $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) $(call if_changed,gzip) @@ -54,6 +55,8 @@ $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) $(call if_changed,bzip2) $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) $(call if_changed,lzma) +$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) + $(call if_changed,lzo) LDFLAGS_piggy.o := -r --format binary --oformat $(LD_BFD) -T $(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix-y) diff --git a/arch/s390/boot/compressed/misc.c b/arch/s390/boot/compressed/misc.c index 14e0479d388..0851eb1e919 100644 --- a/arch/s390/boot/compressed/misc.c +++ b/arch/s390/boot/compressed/misc.c @@ -50,6 +50,10 @@ static unsigned long free_mem_end_ptr; #include "../../../../lib/decompress_unlzma.c" #endif +#ifdef CONFIG_KERNEL_LZO +#include "../../../../lib/decompress_unlzo.c" +#endif + extern _sclp_print_early(const char *); int puts(const char *s) -- cgit v1.2.3-18-g5258 From d882ba699dbdd2156891290c31c22dc13d6530e4 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Wed, 26 May 2010 14:43:34 -0700 Subject: s390: convert cpu notifier to return encapsulate errno value By the previous modification, the cpu notifier can return encapsulate errno value. This converts the cpu notifiers for s390. Signed-off-by: Akinobu Mita Cc: Martin Schwidefsky Cc: Heiko Carstens Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/s390/kernel/smp.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index e4d98de83dd..541053ed234 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -944,21 +944,21 @@ static int __cpuinit smp_cpu_notify(struct notifier_block *self, struct cpu *c = &per_cpu(cpu_devices, cpu); struct sys_device *s = &c->sysdev; struct s390_idle_data *idle; + int err = 0; switch (action) { case CPU_ONLINE: case CPU_ONLINE_FROZEN: idle = &per_cpu(s390_idle, cpu); memset(idle, 0, sizeof(struct s390_idle_data)); - if (sysfs_create_group(&s->kobj, &cpu_online_attr_group)) - return NOTIFY_BAD; + err = sysfs_create_group(&s->kobj, &cpu_online_attr_group); break; case CPU_DEAD: case CPU_DEAD_FROZEN: sysfs_remove_group(&s->kobj, &cpu_online_attr_group); break; } - return NOTIFY_OK; + return notifier_from_errno(err); } static struct notifier_block __cpuinitdata smp_cpu_nb = { -- cgit v1.2.3-18-g5258 From 204f3a04449a9a775e465f7d87bcab08f170e59e Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Wed, 26 May 2010 14:44:30 -0700 Subject: asm-generic: remove ISA_DMA_THRESHOLD in scatterlist.h This is the first half of the attempt to use asm-generic/scatterlist.h on every architecture. There are only two ways to define scatterlist structure. So it's easy to convert every architecture to use asm-generic/scatterlist.h. This patch: The trick for ISA_DMA_THRESHOLD in asm-generic/scatterlist.h doesn't work for powerpc. This lets architectures defin ISA_DMA_THRESHOLD. Hopefully, we can remove ISA_DMA_THRESHOLD in the future; we can do better to decide if the bouncing is necessary or not. Signed-off-by: FUJITA Tomonori Cc: Arnd Bergmann Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner Cc: Russell King Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/s390/include/asm/scatterlist.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/scatterlist.h b/arch/s390/include/asm/scatterlist.h index 35d786fe93a..be44d94cba5 100644 --- a/arch/s390/include/asm/scatterlist.h +++ b/arch/s390/include/asm/scatterlist.h @@ -1 +1,3 @@ +#define ISA_DMA_THRESHOLD (~0UL) + #include -- cgit v1.2.3-18-g5258