aboutsummaryrefslogtreecommitdiffstats
path: root/arch/i386/kernel/acpi/boot.c
diff options
context:
space:
mode:
authorAndrew Morton <akpm@osdl.org>2006-10-20 17:30:27 -0400
committerLen Brown <len.brown@intel.com>2006-10-21 01:22:43 -0400
commitd0a9081b1e75ba62bb4450c5b8e8299a41d25278 (patch)
treeabed939f2d35a78621206b50d2b4c9b4fd923dab /arch/i386/kernel/acpi/boot.c
parent965a3d447276491b7ed053b25679c062beb04194 (diff)
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/kernel/acpi/boot.c')
-rw-r--r--arch/i386/kernel/acpi/boot.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index ab974ff97073..bf7099ca41a5 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)
1319 return 0; 1319 return 0;
1320} 1320}
1321early_param("acpi_sci", setup_acpi_sci); 1321early_param("acpi_sci", setup_acpi_sci);
1322
1323int __acpi_acquire_global_lock(unsigned int *lock)
1324{
1325 unsigned int old, new, val;
1326 do {
1327 old = *lock;
1328 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
1329 val = cmpxchg(lock, old, new);
1330 } while (unlikely (val != old));
1331 return (new < 3) ? -1 : 0;
1332}
1333
1334int __acpi_release_global_lock(unsigned int *lock)
1335{
1336 unsigned int old, new, val;
1337 do {
1338 old = *lock;
1339 new = old & ~0x3;
1340 val = cmpxchg(lock, old, new);
1341 } while (unlikely (val != old));
1342 return old & 0x1;
1343}