From: Kautuk Consul <consul.kautuk@gmail.com>
Date: Mon, 30 Jul 2012 21:39:21 +0000 (-0700)
Subject: xtensa/mm/fault.c: port OOM changes to do_page_fault
X-Git-Tag: v3.6-rc1~41^2~120
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f107701f011e681a21b95259f950bf9c836884e0;p=pandora-kernel.git

xtensa/mm/fault.c: port OOM changes to do_page_fault

Commits d065bd810b6d ("mm: retry page fault when blocking on disk
transfer") and 37b23e0525d3 ("x86,mm: make pagefault killable")
introduced changes into the x86 pagefault handler for making the page
fault handler retryable as well as killable.

These changes reduce the mmap_sem hold time, which is crucial during OOM
killer invocation.

Port these changes to xtensa.

Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com>
Acked-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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