From: Jerry Zhou <uulinux@gmail.com>
Date: Wed, 11 Sep 2013 21:20:26 +0000 (-0700)
Subject: mm: fix negative left shift count when PAGE_SHIFT > 20
X-Git-Tag: v3.12-rc1~52^2~259
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a7e833182a926ae5bc03204dbd00b0bb5539088b;p=pandora-kernel.git

mm: fix negative left shift count when PAGE_SHIFT > 20

When PAGE_SHIFT > 20, the result of "20 - PAGE_SHIFT" is negative. The
previous calculating here will generate an unexpected result. In
addition, if PAGE_SIZE >= 1MB, The memory size of "numentries" was
already integral multiple of 1MB.

Signed-off-by: Jerry Zhou <uulinux@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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