diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_utils.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_utils.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_utils.h b/drivers/gpu/drm/i915/i915_utils.h index c849cfa7cb28..5c94c7ab4607 100644 --- a/drivers/gpu/drm/i915/i915_utils.h +++ b/drivers/gpu/drm/i915/i915_utils.h @@ -102,6 +102,8 @@ #define page_pack_bits(ptr, bits) ptr_pack_bits(ptr, bits, PAGE_SHIFT) #define page_unpack_bits(ptr, bits) ptr_unpack_bits(ptr, bits, PAGE_SHIFT) +#define struct_member(T, member) (((T *)0)->member) + #define ptr_offset(ptr, member) offsetof(typeof(*(ptr)), member) #define fetch_and_zero(ptr) ({ \ @@ -118,7 +120,7 @@ */ #define container_of_user(ptr, type, member) ({ \ void __user *__mptr = (void __user *)(ptr); \ - BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ + BUILD_BUG_ON_MSG(!__same_type(*(ptr), struct_member(type, member)) && \ !__same_type(*(ptr), void), \ "pointer type mismatch in container_of()"); \ ((type __user *)(__mptr - offsetof(type, member))); }) |