tree 291232b64431eeb2c815adc38b20d66cb3355364
parent 0f9a921cf9bf3b524feddc484e2b4d070b7ca0d0
author Rik van Riel <riel@redhat.com> 1352195718 +0000
committer Mel Gorman <mgorman@suse.de> 1355236113 +0000

x86: mm: drop TLB flush from ptep_set_access_flags

Intel has an architectural guarantee that the TLB entry causing
a page fault gets invalidated automatically. This means
we should be able to drop the local TLB invalidation.

Because of the way other areas of the page fault code work,
chances are good that all x86 CPUs do this.  However, if
someone somewhere has an x86 CPU that does not invalidate
the TLB entry causing a page fault, this one-liner should
be easy to revert.

Signed-off-by: Rik van Riel <riel@redhat.com>
Cc: Linus Torvalds <torvalds@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michel Lespinasse <walken@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>