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| author | Yisheng Xie <xieyisheng1@huawei.com> | 2018-01-31 16:16:07 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-31 17:18:36 -0800 |
| commit | 66f308ed7dab1b3460d186a794e1f9c2d229f709 (patch) | |
| tree | faae4027357a5cb0a69e6c2f4fbd279689f92139 /mm/mempolicy.c | |
| parent | 2e3ca40f03bb13709df40eff2f7fc157803fa5a3 (diff) | |
| download | linux-0-day-66f308ed7dab1b3460d186a794e1f9c2d229f709.tar.gz linux-0-day-66f308ed7dab1b3460d186a794e1f9c2d229f709.tar.xz | |
mm/mempolicy: remove redundant check in get_nodes
We have already checked whether maxnode is a page worth of bits, by:
maxnode > PAGE_SIZE*BITS_PER_BYTE
So no need to check it once more.
Link: http://lkml.kernel.org/r/1510882624-44342-2-git-send-email-xieyisheng1@huawei.com
Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Chris Salls <salls@cs.ucsb.edu>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Christopher Lameter <cl@linux.com>
Cc: Tan Xiaojun <tanxiaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mempolicy.c')
| -rw-r--r-- | mm/mempolicy.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 4ce44d3ff03da..6e867a8dcca98 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -1282,8 +1282,6 @@ static int get_nodes(nodemask_t *nodes, const unsigned long __user *nmask, /* When the user specified more nodes than supported just check if the non supported part is all zero. */ if (nlongs > BITS_TO_LONGS(MAX_NUMNODES)) { - if (nlongs > PAGE_SIZE/sizeof(long)) - return -EINVAL; for (k = BITS_TO_LONGS(MAX_NUMNODES); k < nlongs; k++) { unsigned long t; if (get_user(t, nmask + k)) |