android_kernel_google_msm

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John David Anglin 49e8ae95b1 Purge existing TLB entries in set_pte_at and ptep_set_wrprotect commit `7139bc1579` 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>	2013-02-28 06:59:05 -08:00
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asm	Purge existing TLB entries in set_pte_at and ptep_set_wrprotect	2013-02-28 06:59:05 -08:00

John David Anglin 49e8ae95b1 Purge existing TLB entries in set_pte_at and ptep_set_wrprotect

commit 7139bc1579 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>

2013-02-28 06:59:05 -08:00

asm Purge existing TLB entries in set_pte_at and ptep_set_wrprotect 2013-02-28 06:59:05 -08:00