* [PATCH] madvise: use PAGE_ALIGN[ED] for range checking
@ 2019-11-18 3:28 Wei Yang
0 siblings, 0 replies; only message in thread
From: Wei Yang @ 2019-11-18 3:28 UTC (permalink / raw)
To: akpm; +Cc: linux-mm, linux-kernel, Wei Yang
Improve readability, no functional change.
Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
---
mm/madvise.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/madvise.c b/mm/madvise.c
index 2be9f3fdb05e..89913b545649 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -1051,9 +1051,9 @@ SYSCALL_DEFINE3(madvise, unsigned long, start, size_t, len_in, int, behavior)
if (!madvise_behavior_valid(behavior))
return error;
- if (start & ~PAGE_MASK)
+ if (!PAGE_ALIGNED(start))
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 */
if (len_in && !len)
--
2.17.1
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