From: Nick Piggin <npiggin@suse.de>
Date: Mon, 22 Sep 2008 20:57:50 +0000 (-0700)
Subject: mm: tiny-shmem fix lock ordering: mmap_sem vs i_mutex
X-Git-Tag: v2.6.27-rc8~39
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=db203d53d474aa068984e409d807628f5841da1b;p=pandora-kernel.git

mm: tiny-shmem fix lock ordering: mmap_sem vs i_mutex

tiny-shmem calls do_truncate in shmem_file_setup.  do_truncate takes
i_mutex, and shmem_file_setup is called with mmap_sem held.  However
i_mutex nests outside mmap_sem.

Copy the code in shmem.c to avoid this problem.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Reported-and-tested-by: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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