diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-05 11:15:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-05 11:15:54 -0700 |
| commit | 45e36c1666aa6c8b0c538abcf984b336184d8c3f (patch) | |
| tree | c1f1771d6b02ec210238081450b4a063847b3383 /arch/sh/kernel/io_trapped.c | |
| parent | 87fc94d54b639d8c39fc4a11db0e142f84096e13 (diff) | |
| parent | 68b42d1b548be1840aff7122fdebeb804daf0fa3 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (23 commits)
sh: sh7785lcr: Map whole PCI address space.
sh: Fix up DSP context save/restore.
sh: Fix up number of on-chip DMA channels on SH7091.
sh: update defconfigs.
sh: Kill off broken direct-mapped cache mode.
sh: Wire up ARCH_HAS_DEFAULT_IDLE for cpuidle.
sh: Add a command line option for disabling I/O trapping.
sh: Select ARCH_HIBERNATION_POSSIBLE.
sh: migor: Fix up CEU use flags.
input: migor_ts: add wakeup support
rtc: rtc-sh: use set_irq_wake()
input: sh_keysc: use enable/disable_irq_wake()
sh: intc: set_irq_wake() support
sh: intc: install enable, disable and shutdown callbacks
clocksource: sh_cmt: use remove_irq() and remove clockevent workaround
sh: ap325 and Migo-R use new sh_mobile_ceu_info flags
sh: Fix up -Wformat-security whining.
sh: ap325rxa: Add ov772x support, again.
sh: Sanitize asm/mmu.h for assembly use.
sh: Tidy up sh7786 pinmux table.
...
Diffstat (limited to 'arch/sh/kernel/io_trapped.c')
| -rw-r--r-- | arch/sh/kernel/io_trapped.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/sh/kernel/io_trapped.c b/arch/sh/kernel/io_trapped.c index 39cd7f3aec7..c22853b059e 100644 --- a/arch/sh/kernel/io_trapped.c +++ b/arch/sh/kernel/io_trapped.c @@ -14,6 +14,7 @@ #include <linux/bitops.h> #include <linux/vmalloc.h> #include <linux/module.h> +#include <linux/init.h> #include <asm/system.h> #include <asm/mmu_context.h> #include <asm/uaccess.h> @@ -32,6 +33,15 @@ EXPORT_SYMBOL_GPL(trapped_mem); #endif static DEFINE_SPINLOCK(trapped_lock); +static int trapped_io_disable __read_mostly; + +static int __init trapped_io_setup(char *__unused) +{ + trapped_io_disable = 1; + return 1; +} +__setup("noiotrap", trapped_io_setup); + int register_trapped_io(struct trapped_io *tiop) { struct resource *res; @@ -39,6 +49,9 @@ int register_trapped_io(struct trapped_io *tiop) struct page *pages[TRAPPED_PAGES_MAX]; int k, n; + if (unlikely(trapped_io_disable)) + return 0; + /* structure must be page aligned */ if ((unsigned long)tiop & (PAGE_SIZE - 1)) goto bad; |