diff options
Diffstat (limited to 'include/acpi/platform/aclinux.h')
| -rw-r--r-- | include/acpi/platform/aclinux.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h index 5d2a5e9544d9..f72403c4b51a 100644 --- a/include/acpi/platform/aclinux.h +++ b/include/acpi/platform/aclinux.h @@ -59,7 +59,7 @@ #include <linux/ctype.h> #include <linux/sched.h> #include <asm/system.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/div64.h> #include <asm/acpi.h> #include <linux/slab.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__ */ |