diff options
Diffstat (limited to 'include/asm-i386/acpi.h')
-rw-r--r-- | include/asm-i386/acpi.h | 26 |
1 files changed, 2 insertions, 24 deletions
diff --git a/include/asm-i386/acpi.h b/include/asm-i386/acpi.h index c80b3a94511a..7cfad93edf10 100644 --- a/include/asm-i386/acpi.h +++ b/include/asm-i386/acpi.h | |||
@@ -56,30 +56,8 @@ | |||
56 | #define ACPI_ENABLE_IRQS() local_irq_enable() | 56 | #define ACPI_ENABLE_IRQS() local_irq_enable() |
57 | #define ACPI_FLUSH_CPU_CACHE() wbinvd() | 57 | #define ACPI_FLUSH_CPU_CACHE() wbinvd() |
58 | 58 | ||
59 | 59 | int __acpi_acquire_global_lock(unsigned int *lock); | |
60 | static inline int | 60 | int __acpi_release_global_lock(unsigned int *lock); |
61 | __acpi_acquire_global_lock (unsigned int *lock) | ||
62 | { | ||
63 | unsigned int old, new, val; | ||
64 | do { | ||
65 | old = *lock; | ||
66 | new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); | ||
67 | val = cmpxchg(lock, old, new); | ||
68 | } while (unlikely (val != old)); | ||
69 | return (new < 3) ? -1 : 0; | ||
70 | } | ||
71 | |||
72 | static inline int | ||
73 | __acpi_release_global_lock (unsigned int *lock) | ||
74 | { | ||
75 | unsigned int old, new, val; | ||
76 | do { | ||
77 | old = *lock; | ||
78 | new = old & ~0x3; | ||
79 | val = cmpxchg(lock, old, new); | ||
80 | } while (unlikely (val != old)); | ||
81 | return old & 0x1; | ||
82 | } | ||
83 | 61 | ||
84 | #define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \ | 62 | #define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \ |
85 | ((Acq) = __acpi_acquire_global_lock((unsigned int *) GLptr)) | 63 | ((Acq) = __acpi_acquire_global_lock((unsigned int *) GLptr)) |