John David Anglin 7139bc1579 [PARISC] Purge existing TLB entries in set_pte_at and ptep_set_wrprotect
This patch goes a long way toward fixing the minifail bug, and
it  significantly improves the stability of SMP machines such as
the rp3440.  When write  protecting a page for COW, we need to
purge the existing translation.  Otherwise, the COW break
doesn't occur as expected because the TLB may still have a stale entry
which allows writes.

[jejb: fix up checkpatch errors]
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2013-01-19 10:54:45 +00:00
..
2012-05-05 13:00:24 +02:00
2008-10-15 20:55:51 +02:00
2012-06-05 14:10:23 +09:00
nm