From: NeilBrown <neilb@suse.de>
Date: Tue, 22 May 2012 03:55:08 +0000 (+1000)
Subject: md/bitmap: centralise allocation of bitmap file pages.
X-Git-Tag: v3.5-rc1~110^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=27581e5ae01f77b5472dc5c2368b41063fed7f37;p=pandora-kernel.git

md/bitmap: centralise allocation of bitmap file pages.

Instead of allocating pages in read_sb_page, read_page and
bitmap_read_sb, allocate them all in bitmap_init_from disk.

Also replace the hack of calling "attach_page_buffers(page, NULL)" to
ensure that free_buffer() won't complain, by putting a test for
PagePrivate in free_buffer().

Signed-off-by: NeilBrown <neilb@suse.de>
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