提交 b7163936 编写于 作者: C Chris Wilson

drm/i915: Move a few more utility macros to i915_utils.h

Now that we have split out a header file for simple macros (that maybe
we can promote into a core header), move a few macros across from
i915_drv.h
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170105164148.26875-1-chris@chris-wilson.co.ukReviewed-by: NMatthew Auld <matthew.auld@intel.com>
Reviewed-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
上级 121dfbb2
......@@ -4026,24 +4026,4 @@ int remap_io_mapping(struct vm_area_struct *vma,
unsigned long addr, unsigned long pfn, unsigned long size,
struct io_mapping *iomap);
#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
......@@ -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 */
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