From: David Rientjes <rientjes@google.com>
Date: Tue, 22 Sep 2009 00:04:31 +0000 (-0700)
Subject: flex_array: add flex_array_shrink function
X-Git-Tag: v2.6.32-rc1~436
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4af5a2f770cc8575840ccb1514ec76ecb592985c;p=pandora-kernel.git

flex_array: add flex_array_shrink function

Add a new function to the flex_array API:

	int flex_array_shrink(struct flex_array *fa)

This function will free all unused second-level pages.  Since elements are
now poisoned if they are not allocated with __GFP_ZERO, it's possible to
identify parts that consist solely of unused elements.

flex_array_shrink() returns the number of pages freed.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

Reading git-diff-tree failed