diff options
| author | Andrew Morton <akpm@osdl.org> | 2006-10-20 21:30:27 (GMT) |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2006-10-21 05:22:43 (GMT) |
| commit | d0a9081b1e75ba62bb4450c5b8e8299a41d25278 (patch) | |
| tree | abed939f2d35a78621206b50d2b4c9b4fd923dab /arch/i386 | |
| parent | 965a3d447276491b7ed053b25679c062beb04194 (diff) | |
| download | linux-d0a9081b1e75ba62bb4450c5b8e8299a41d25278.tar.xz | |
ACPI: uninline ACPI global locking functions
- Fixes a build problem with CONFIG_M386=y (include file dependencies get
messy).
- Share the implementation between x86 and x86_64
- These are too big to inline anyway.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/i386')
| -rw-r--r-- | arch/i386/kernel/acpi/boot.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c index ab974ff..bf7099c 100644 --- a/arch/i386/kernel/acpi/boot.c +++ b/arch/i386/kernel/acpi/boot.c @@ -1319,3 +1319,25 @@ static int __init setup_acpi_sci(char *s) return 0; } early_param("acpi_sci", setup_acpi_sci); + +int __acpi_acquire_global_lock(unsigned int *lock) +{ + unsigned int old, new, val; + do { + old = *lock; + new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); + val = cmpxchg(lock, old, new); + } while (unlikely (val != old)); + return (new < 3) ? -1 : 0; +} + +int __acpi_release_global_lock(unsigned int *lock) +{ + unsigned int old, new, val; + do { + old = *lock; + new = old & ~0x3; + val = cmpxchg(lock, old, new); + } while (unlikely (val != old)); + return old & 0x1; +} |