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mm/util: use offset_in_page macro

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linux/mm.h provides offset_in_page() macro.  Let's use already predefined
macro instead of (addr & ~PAGE_MASK).

Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexander Kuleshov 2015-11-05 18:46:46 -08:00 • committed by Linus Torvalds
parent f09f1243ca
commit ea53cde089
1 changed files with 1 additions and 1 deletions
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mm/util.c
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@ -309,7 +309,7 @@ unsigned long vm_mmap(struct file *file, unsigned long addr,
{ {
if (unlikely(offset + PAGE_ALIGN(len) < offset)) if (unlikely(offset + PAGE_ALIGN(len) < offset))
return -EINVAL; return -EINVAL;
if (unlikely(offset & ~PAGE_MASK)) if (unlikely(offset_in_page(offset)))
return -EINVAL; return -EINVAL;
return vm_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT); return vm_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT);