From: Maxim Patlasov <mpatlasov@parallels.com>
Date: Fri, 26 Oct 2012 15:48:42 +0000 (+0400)
Subject: fuse: rework fuse_retrieve()
X-Git-Tag: v3.9-rc1~135^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4d53dc99baf139e4fa0d395f7658032cc2eb3297;p=pandora-kernel.git

fuse: rework fuse_retrieve()

The patch reworks fuse_retrieve() to allocate only so many page pointers
as needed. The core part of the patch is the following calculation:

	num_pages = (num + offset + PAGE_SIZE - 1) >> PAGE_SHIFT;

(thanks Miklos for formula). All other changes are mostly shuffling lines.

Signed-off-by: Maxim Patlasov <mpatlasov@parallels.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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