From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 4 May 2012 14:50:50 +0000 (-0700)
Subject: Merge branch 'fix-unmapped-word-at-a-time'
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f4622045455faaac958ca35a0cf313f3d6c14d8b;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

Merge branch 'fix-unmapped-word-at-a-time'

Jana Saout confirmed that this fixes the page faults he saw.

His problem was triggered by ocfs2 and autofs symlink lookups, where the
symlink allocation was at the end of a page.  But the deeper reason
seems to be the use of Xen-PV, which is what then causes him to have all
these unmapped pages, which is what then makes it a problem when the
unaligned word-at-a-time code fetches data past the end of a page.

* fix-unmapped-word-at-a-time:
  vfs: make word-at-a-time accesses handle a non-existing page
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f4622045455faaac958ca35a0cf313f3d6c14d8b