linux-kernel - [PATCH 03/31] mm: expose gfp_to_alloc

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Message-Id: <1254405903-15760-1-git-send-email-sjayaraman@suse.de>
Date:	Thu,  1 Oct 2009 19:35:03 +0530
From:	Suresh Jayaraman <sjayaraman@...e.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:	netdev@...r.kernel.org, Neil Brown <neilb@...e.de>,
	Miklos Szeredi <mszeredi@...e.cz>, Wouter Verhelst <w@...r.be>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	trond.myklebust@....uio.no, Suresh Jayaraman <sjayaraman@...e.de>
Subject: [PATCH 03/31] mm: expose gfp_to_alloc_flags()

From: Peter Zijlstra <a.p.zijlstra@...llo.nl> 

Expose the gfp to alloc_flags mapping, so we can use it in other parts
of the vm.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Signed-off-by: Suresh Jayaraman <sjayaraman@...e.de>
---
 mm/internal.h   |   15 +++++++++++++++
 mm/page_alloc.c |   16 +---------------
 2 files changed, 16 insertions(+), 15 deletions(-)

Index: mmotm/mm/internal.h
===================================================================
--- mmotm.orig/mm/internal.h
+++ mmotm/mm/internal.h
@@ -194,6 +194,21 @@ static inline struct page *mem_map_next(
 #define __paginginit __init
 #endif
 
+/* The ALLOC_WMARK bits are used as an index to zone->watermark */
+#define ALLOC_WMARK_MIN		WMARK_MIN
+#define ALLOC_WMARK_LOW		WMARK_LOW
+#define ALLOC_WMARK_HIGH	WMARK_HIGH
+#define ALLOC_NO_WATERMARKS	0x04 /* don't check watermarks at all */
+
+/* Mask to get the watermark bits */
+#define ALLOC_WMARK_MASK	(ALLOC_NO_WATERMARKS-1)
+
+#define ALLOC_HARDER		0x10 /* try to alloc harder */
+#define ALLOC_HIGH		0x20 /* __GFP_HIGH set */
+#define ALLOC_CPUSET		0x40 /* check for correct cpuset */
+
+int gfp_to_alloc_flags(gfp_t gfp_mask);
+
 /* Memory initialisation debug and verification */
 enum mminit_level {
 	MMINIT_WARNING,
Index: mmotm/mm/page_alloc.c
===================================================================
--- mmotm.orig/mm/page_alloc.c
+++ mmotm/mm/page_alloc.c
@@ -1190,19 +1190,6 @@ failed:
 	return NULL;
 }
 
-/* The ALLOC_WMARK bits are used as an index to zone->watermark */
-#define ALLOC_WMARK_MIN		WMARK_MIN
-#define ALLOC_WMARK_LOW		WMARK_LOW
-#define ALLOC_WMARK_HIGH	WMARK_HIGH
-#define ALLOC_NO_WATERMARKS	0x04 /* don't check watermarks at all */
-
-/* Mask to get the watermark bits */
-#define ALLOC_WMARK_MASK	(ALLOC_NO_WATERMARKS-1)
-
-#define ALLOC_HARDER		0x10 /* try to alloc harder */
-#define ALLOC_HIGH		0x20 /* __GFP_HIGH set */
-#define ALLOC_CPUSET		0x40 /* check for correct cpuset */
-
 #ifdef CONFIG_FAIL_PAGE_ALLOC
 
 static struct fail_page_alloc_attr {
@@ -1691,8 +1678,7 @@ void wake_all_kswapd(unsigned int order,
 		wakeup_kswapd(zone, order);
 }
 
-static inline int
-gfp_to_alloc_flags(gfp_t gfp_mask)
+int gfp_to_alloc_flags(gfp_t gfp_mask)
 {
 	struct task_struct *p = current;
 	int alloc_flags = ALLOC_WMARK_MIN | ALLOC_CPUSET;
--
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