From: Daniel Vetter Date: Sun, 25 Mar 2012 17:47:41 +0000 (+0200) Subject: mm: extend prefault helpers to fault in more than PAGE_SIZE X-Git-Tag: v3.5-rc1~83^2~140^2~56 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f56f821feb7b36223f309e0ec05986bb137ce418;p=pandora-kernel.git mm: extend prefault helpers to fault in more than PAGE_SIZE drm/i915 wants to read/write more than one page in its fastpath and hence needs to prefault more than PAGE_SIZE bytes. Add new functions in filemap.h to make that possible. Also kill a copy&pasted spurious space in both functions while at it. v2: As suggested by Andrew Morton, add a multipage parameter to both functions to avoid the additional branch for the pagemap.c hotpath. My gcc 4.6 here seems to dtrt and indeed reap these branches where not needed. v3: Becaus I couldn't find a way around adding a uaddr += PAGE_SIZE to the filemap.c hotpaths (that the compiler couldn't remove again), let's go with separate new functions for the multipage use-case. v4: Adjust comment to CodingStlye and fix spelling. Acked-by: Andrew Morton Signed-off-by: Daniel Vetter --- Reading git-diff-tree failed