linux-kernel - Re: [PATCH] add __GFP_ZERO to GFP_LEVEL

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Message-Id: <1185190711.8197.15.camel@twins>
Date:	Mon, 23 Jul 2007 13:38:31 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Mel Gorman <mel@...net.ie>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Christoph Lameter <clameter@....com>,
	Daniel Phillips <phillips@...gle.com>,
	linux-mm <linux-mm@...ck.org>
Subject: Re: [PATCH] add __GFP_ZERO to GFP_LEVEL_MASK

On Mon, 2007-07-23 at 12:21 +0100, Mel Gorman wrote:

> Does this patch compile though?

Ugh, the fix landed in another patch :-(

updated patch below.

---
Daniel recently spotted that __GFP_ZERO is not (and has never been)
part of GFP_LEVEL_MASK. I could not find a reason for this in the
original patch: 3977971c7f09ce08ed1b8d7a67b2098eb732e4cd in the -bk
tree.

This of course is in stark contradiction with the comment accompanying
GFP_LEVEL_MASK.
---
 include/linux/gfp.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6-2/include/linux/gfp.h
===================================================================
--- linux-2.6-2.orig/include/linux/gfp.h
+++ linux-2.6-2/include/linux/gfp.h
@@ -56,7 +56,7 @@ struct vm_area_struct;
 /* if you forget to add the bitmask here kernel will crash, period */
 #define GFP_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_FS| \
 			__GFP_COLD|__GFP_NOWARN|__GFP_REPEAT| \
-			__GFP_NOFAIL|__GFP_NORETRY|__GFP_COMP| \
+			__GFP_NOFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_ZERO| \
 			__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_THISNODE| \
 			__GFP_MOVABLE)
 


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