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UBI: allocate memory with GFP_NOFS
authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Tue, 28 Aug 2007 18:29:32 +0000 (21:29 +0300)
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Sun, 14 Oct 2007 10:10:20 +0000 (13:10 +0300)
Use GFP_NOFS flag when allocating memory on I/O path, because otherwise
we may deadlock the filesystem which works on top of us. We observed
the deadlocks with UBIFS. Example:

VFS->FS lock a lock->UBI->kmalloc()->VFS writeback->FS locks the same
lock again.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

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