From: Hugh Dickins <hughd@google.com>
Date: Tue, 26 Jul 2011 00:12:33 +0000 (-0700)
Subject: tmpfs: refine shmem_file_splice_read
X-Git-Tag: v3.1-rc1~241^2~74
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=71f0e07a605fad1fb6b288e4dc1dd8dfa78f4872;p=pandora-kernel.git

tmpfs: refine shmem_file_splice_read

Tidy up shmem_file_splice_read():

Remove readahead: okay, we could implement shmem readahead on swap,
but have never done so before, swap being the slow exceptional path.

Use shmem_getpage() instead of find_or_create_page() plus ->readpage().

Remove several comments: sorry, I found them more distracting than
helpful, and this will not be the reference version of splice_read().

Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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