diff options
Diffstat (limited to 'linux-core/drm_os_linux.h')
| -rw-r--r-- | linux-core/drm_os_linux.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/linux-core/drm_os_linux.h b/linux-core/drm_os_linux.h index 2688479a..8921944e 100644 --- a/linux-core/drm_os_linux.h +++ b/linux-core/drm_os_linux.h @@ -92,9 +92,9 @@ static __inline__ int mtrr_del(int reg, unsigned long base, unsigned long size) #define DRM_COPY_TO_USER(arg1, arg2, arg3) \ copy_to_user(arg1, arg2, arg3) /* Macros for copyfrom user, but checking readability only once */ -#define DRM_VERIFYAREA_READ( uaddr, size ) \ +#define DRM_VERIFYAREA_READ( uaddr, size ) \ (access_ok( VERIFY_READ, uaddr, size) ? 0 : -EFAULT) -#define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3) \ +#define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3) \ __copy_from_user(arg1, arg2, arg3) #define DRM_COPY_TO_USER_UNCHECKED(arg1, arg2, arg3) \ __copy_to_user(arg1, arg2, arg3) @@ -129,3 +129,17 @@ do { \ #define DRM_WAKEUP( queue ) wake_up_interruptible( queue ) #define DRM_INIT_WAITQUEUE( queue ) init_waitqueue_head( queue ) + +/** Type for the OS's non-sleepable mutex lock */ +#define DRM_SPINTYPE spinlock_t +/** + * Initialize the lock for use. name is an optional string describing the + * lock + */ +#define DRM_SPININIT(l,name) spin_lock_init(l) +#define DRM_SPINUNINIT(l) +#define DRM_SPINLOCK(l) spin_lock(l) +#define DRM_SPINUNLOCK(l) spin_unlock(l) +#define DRM_SPINLOCK_IRQSAVE(l, _flags) spin_lock_irqsave(l, _flags); +#define DRM_SPINUNLOCK_IRQRESTORE(l, _flags) spin_unlock_irqrestore(l, _flags); +#define DRM_SPINLOCK_ASSERT(l) do {} while (0) |