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| author | John Stultz <john.stultz@linaro.org> | 2011-07-25 09:58:06 -0700 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2011-07-25 09:58:06 -0700 |
| commit | 21a602b5cdc203cbcf8bbeeb26edeb3de7c65955 (patch) | |
| tree | 8618b4a8882f78076a779ebb416b54332cc213db /include/acpi/platform/aclinux.h | |
| parent | 1a3807e5a6bea7e4b195fbb399bbc09e73230d4c (diff) | |
| parent | 81f6236c4811b2b2b3ea64a306c071f76788ac4b (diff) | |
Merge branch 'upstream/linaro-3.0' into linaro-android-3.0linux-linaro-3.0-2011.07-1-android-0
Diffstat (limited to 'include/acpi/platform/aclinux.h')
| -rw-r--r-- | include/acpi/platform/aclinux.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h index 5d2a5e9544d..2ce1be9f629 100644 --- a/include/acpi/platform/aclinux.h +++ b/include/acpi/platform/aclinux.h @@ -159,6 +159,24 @@ static inline void *acpi_os_acquire_object(acpi_cache_t * cache) } while (0) #endif +/* + * When lockdep is enabled, the spin_lock_init() macro stringifies it's + * argument and uses that as a name for the lock in debugging. + * By executing spin_lock_init() in a macro the key changes from "lock" for + * all locks to the name of the argument of acpi_os_create_lock(), which + * prevents lockdep from reporting false positives for ACPICA locks. + */ +#define acpi_os_create_lock(__handle) \ +({ \ + spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ + \ + if (lock) { \ + *(__handle) = lock; \ + spin_lock_init(*(__handle)); \ + } \ + lock ? AE_OK : AE_NO_MEMORY; \ +}) + #endif /* __KERNEL__ */ #endif /* __ACLINUX_H__ */ |