btrfs: cleanup, use kmalloc_array/kcalloc array helpers
authorDavid Sterba <dsterba@suse.cz>
Fri, 20 Feb 2015 17:00:26 +0000 (18:00 +0100)
committerDavid Sterba <dsterba@suse.cz>
Tue, 3 Mar 2015 16:23:58 +0000 (17:23 +0100)
Convert kmalloc(nr * size, ..) to kmalloc_array that does additional
overflow checks, the zeroing variant is kcalloc.

Signed-off-by: David Sterba <dsterba@suse.cz>

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