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/[email protected]
Signed-off-by: Yisheng Xie <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Acked-by: David Rientjes <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Naoya Horiguchi <[email protected]>
Cc: Chris Salls <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Christopher Lameter <[email protected]>
Cc: Tan Xiaojun <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 4ce44d3ff03da6a6f09a9b92c9bb0750aaf3b7a4..6e867a8dcca986dcb391d0babf1aace929515c8c 100644 (file)
--- 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))