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71 lines
2.2 KiB
71 lines
2.2 KiB
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
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Subject: [PATCH 03/31] mm: expose gfp_to_alloc_flags()
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Patch-mainline: not yet
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Expose the gfp to alloc_flags mapping, so we can use it in other parts
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of the vm.
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Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
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Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
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---
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mm/internal.h | 15 +++++++++++++++
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mm/page_alloc.c | 16 +---------------
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2 files changed, 16 insertions(+), 15 deletions(-)
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--- a/mm/internal.h
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+++ b/mm/internal.h
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@@ -185,6 +185,21 @@ static inline struct page *mem_map_next(
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#define __paginginit __init
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#endif
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+/* The ALLOC_WMARK bits are used as an index to zone->watermark */
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+#define ALLOC_WMARK_MIN WMARK_MIN
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+#define ALLOC_WMARK_LOW WMARK_LOW
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+#define ALLOC_WMARK_HIGH WMARK_HIGH
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+#define ALLOC_NO_WATERMARKS 0x04 /* don't check watermarks at all */
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+
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+/* Mask to get the watermark bits */
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+#define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1)
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+
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+#define ALLOC_HARDER 0x10 /* try to alloc harder */
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+#define ALLOC_HIGH 0x20 /* __GFP_HIGH set */
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+#define ALLOC_CPUSET 0x40 /* check for correct cpuset */
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+
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+int gfp_to_alloc_flags(gfp_t gfp_mask);
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+
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/* Memory initialisation debug and verification */
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enum mminit_level {
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MMINIT_WARNING,
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--- a/mm/page_alloc.c
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+++ b/mm/page_alloc.c
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@@ -1345,19 +1345,6 @@ failed:
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return NULL;
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}
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-/* The ALLOC_WMARK bits are used as an index to zone->watermark */
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-#define ALLOC_WMARK_MIN WMARK_MIN
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-#define ALLOC_WMARK_LOW WMARK_LOW
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-#define ALLOC_WMARK_HIGH WMARK_HIGH
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-#define ALLOC_NO_WATERMARKS 0x04 /* don't check watermarks at all */
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-
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-/* Mask to get the watermark bits */
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-#define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1)
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-
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-#define ALLOC_HARDER 0x10 /* try to alloc harder */
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-#define ALLOC_HIGH 0x20 /* __GFP_HIGH set */
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-#define ALLOC_CPUSET 0x40 /* check for correct cpuset */
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-
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#ifdef CONFIG_FAIL_PAGE_ALLOC
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static struct fail_page_alloc_attr {
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@@ -1911,8 +1898,7 @@ void wake_all_kswapd(unsigned int order,
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wakeup_kswapd(zone, order, classzone_idx);
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}
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-static inline int
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-gfp_to_alloc_flags(gfp_t gfp_mask)
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+int gfp_to_alloc_flags(gfp_t gfp_mask)
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{
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int alloc_flags = ALLOC_WMARK_MIN | ALLOC_CPUSET;
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const gfp_t wait = gfp_mask & __GFP_WAIT;
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