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mm/madvise.c: use PAGE_ALIGN[ED] for range checking

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Improve readability, no functional change.

Link: http://lkml.kernel.org/r/20191118032857.22683-1-richardw.yang@linux.intel.com
Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Wei Yang 2019-11-30 17:57:46 -08:00 committed by Linus Torvalds
parent d3cd257ce1
commit df6c6500b4
1 changed files with 2 additions and 2 deletions
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mm/madvise.c
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@ -1059,9 +1059,9 @@ SYSCALL_DEFINE3(madvise, unsigned long, start, size_t, len_in, int, behavior)
if (!madvise_behavior_valid(behavior)) if (!madvise_behavior_valid(behavior))
return error; return error;
if (start & ~PAGE_MASK) if (!PAGE_ALIGNED(start))
return error; return error;
len = (len_in + ~PAGE_MASK) & PAGE_MASK; len = PAGE_ALIGN(len_in);
/* Check to see whether len was rounded up from small -ve to zero */ /* Check to see whether len was rounded up from small -ve to zero */
if (len_in && !len) if (len_in && !len)