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-rw-r--r--include/asm-x86_64/acpi.h26
1 files changed, 2 insertions, 24 deletions
diff --git a/include/asm-x86_64/acpi.h b/include/asm-x86_64/acpi.h
index 9d1916e59c04..6b6fc6f8be7e 100644
--- a/include/asm-x86_64/acpi.h
+++ b/include/asm-x86_64/acpi.h
@@ -54,30 +54,8 @@
54#define ACPI_ENABLE_IRQS() local_irq_enable() 54#define ACPI_ENABLE_IRQS() local_irq_enable()
55#define ACPI_FLUSH_CPU_CACHE() wbinvd() 55#define ACPI_FLUSH_CPU_CACHE() wbinvd()
56 56
57 57int __acpi_acquire_global_lock(unsigned int *lock);
58static inline int 58int __acpi_release_global_lock(unsigned int *lock);
59__acpi_acquire_global_lock (unsigned int *lock)
60{
61 unsigned int old, new, val;
62 do {
63 old = *lock;
64 new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
65 val = cmpxchg(lock, old, new);
66 } while (unlikely (val != old));
67 return (new < 3) ? -1 : 0;
68}
69
70static inline int
71__acpi_release_global_lock (unsigned int *lock)
72{
73 unsigned int old, new, val;
74 do {
75 old = *lock;
76 new = old & ~0x3;
77 val = cmpxchg(lock, old, new);
78 } while (unlikely (val != old));
79 return old & 0x1;
80}
81 59
82#define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \ 60#define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \
83 ((Acq) = __acpi_acquire_global_lock((unsigned int *) GLptr)) 61 ((Acq) = __acpi_acquire_global_lock((unsigned int *) GLptr))