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| author | Ingo Molnar <mingo@elte.hu> | 2011-07-21 17:59:54 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-07-21 18:00:01 +0200 |
| commit | 994bf1c92270e3d7731ea08f1d1bd7a668314e60 (patch) | |
| tree | 4409a21eab486e53fbe350a66e8a4f28b7a720c0 /include/acpi/platform/aclinux.h | |
| parent | xtensa: Use generic config PREEMPT definition (diff) | |
| parent | Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/ke... (diff) | |
| download | linux-994bf1c92270e3d7731ea08f1d1bd7a668314e60.tar.xz linux-994bf1c92270e3d7731ea08f1d1bd7a668314e60.zip | |
Merge branch 'linus' into sched/core
Merge reason: pick up the latest scheduler fixes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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 5d2a5e9544d9..2ce1be9f6291 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__ */ |