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| author | Keith Packard <keithp@keithp.com> | 2011-07-22 22:40:42 +0200 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-07-22 22:40:42 +0200 |
| commit | df7976797fa9af161690dbf4dee81ed92cdc150f (patch) | |
| tree | be6f04706d91cc80da4dbd3a5f5f2a174f1bdae3 /include/acpi/platform/aclinux.h | |
| parent | drm/i915: Skip GPU wait for scanout pin while wedged (diff) | |
| parent | drm/i915: load the LUT before pipe enable on ILK+ (diff) | |
| download | linux-df7976797fa9af161690dbf4dee81ed92cdc150f.tar.xz linux-df7976797fa9af161690dbf4dee81ed92cdc150f.zip | |
Merge branch 'drm-intel-fixes' into drm-intel-next
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__ */ |