diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_utils.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_utils.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_utils.h b/drivers/gpu/drm/i915/i915_utils.h index 2987219a6300..4920ff9aba62 100644 --- a/drivers/gpu/drm/i915/i915_utils.h +++ b/drivers/gpu/drm/i915/i915_utils.h @@ -131,6 +131,18 @@ __check_struct_size(size_t base, size_t arr, size_t count, size_t *size) ((typeof(ptr))((unsigned long)(ptr) | __bits)); \ }) +#define ptr_count_dec(p_ptr) do { \ + typeof(p_ptr) __p = (p_ptr); \ + unsigned long __v = (unsigned long)(*__p); \ + *__p = (typeof(*p_ptr))(--__v); \ +} while (0) + +#define ptr_count_inc(p_ptr) do { \ + typeof(p_ptr) __p = (p_ptr); \ + unsigned long __v = (unsigned long)(*__p); \ + *__p = (typeof(*p_ptr))(++__v); \ +} while (0) + #define page_mask_bits(ptr) ptr_mask_bits(ptr, PAGE_SHIFT) #define page_unmask_bits(ptr) ptr_unmask_bits(ptr, PAGE_SHIFT) #define page_pack_bits(ptr, bits) ptr_pack_bits(ptr, bits, PAGE_SHIFT) |