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| author | John David Anglin <dave.anglin@bell.net> | 2013-01-14 19:45:00 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-02-28 06:32:27 -0800 |
| commit | ef96576ef50b8bbd4c63b9cebab372cb7cf4ba67 (patch) | |
| tree | bf2a6d1637c5b3d84b4fcd71d0970f18ada28aac /arch/avr32/lib/io-readsw.S | |
| parent | 534aaed9080ba82974e8d2a71e43a362918138f8 (diff) | |
| download | kernel_samsung_aries-ef96576ef50b8bbd4c63b9cebab372cb7cf4ba67.zip kernel_samsung_aries-ef96576ef50b8bbd4c63b9cebab372cb7cf4ba67.tar.gz kernel_samsung_aries-ef96576ef50b8bbd4c63b9cebab372cb7cf4ba67.tar.bz2 | |
Purge existing TLB entries in set_pte_at and ptep_set_wrprotect
commit 7139bc1579901b53db7e898789e916ee2fb52d78 upstream.
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>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/avr32/lib/io-readsw.S')
0 files changed, 0 insertions, 0 deletions