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authorYisheng Xie <xieyisheng1@huawei.com>2018-01-31 16:16:07 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-01-31 17:18:36 -0800
commit66f308ed7dab1b3460d186a794e1f9c2d229f709 (patch)
treefaae4027357a5cb0a69e6c2f4fbd279689f92139 /mm/mempolicy.c
parent2e3ca40f03bb13709df40eff2f7fc157803fa5a3 (diff)
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.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 4ce44d3ff03d..6e867a8dcca9 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))