diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_utils.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_utils.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_utils.h b/drivers/gpu/drm/i915/i915_utils.h index 9983ef30bac8..34020873e1f6 100644 --- a/drivers/gpu/drm/i915/i915_utils.h +++ b/drivers/gpu/drm/i915/i915_utils.h @@ -41,4 +41,24 @@ #define overflows_type(x, T) \ (sizeof(x) > sizeof(T) && (x) >> (sizeof(T) * BITS_PER_BYTE)) +#define ptr_mask_bits(ptr) ({ \ + unsigned long __v = (unsigned long)(ptr); \ + (typeof(ptr))(__v & PAGE_MASK); \ +}) + +#define ptr_unpack_bits(ptr, bits) ({ \ + unsigned long __v = (unsigned long)(ptr); \ + (bits) = __v & ~PAGE_MASK; \ + (typeof(ptr))(__v & PAGE_MASK); \ +}) + +#define ptr_pack_bits(ptr, bits) \ + ((typeof(ptr))((unsigned long)(ptr) | (bits))) + +#define fetch_and_zero(ptr) ({ \ + typeof(*ptr) __T = *(ptr); \ + *(ptr) = (typeof(*ptr))0; \ + __T; \ +}) + #endif /* !__I915_UTILS_H */ |