[patch -mm 1/3] mm: rename allocflags_to_migratetype for clarity

David Rientjes
2014-06-04T00:32:38Z

The page allocator has gfp flags (like __GFP_WAIT) and alloc flags (like
ALLOC_CPUSET) that have separate semantics.

The function allocflags_to_migratetype() actually takes gfp flags, not alloc
flags, and returns a migratetype. Rename it to gfpflags_to_migratetype().

Signed-off-by: David Rientjes <rientjes@google.com>
---
include/linux/gfp.h | 2 +-
mm/compaction.c | 4 ++--
mm/page_alloc.c | 6 +++---
3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/linux/gfp.h b/include/linux/gfp.h
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -156,7 +156,7 @@ struct vm_area_struct;
#define GFP_DMA32 __GFP_DMA32

/* Convert GFP flags to their corresponding migrate type */
-static inline int allocflags_to_migratetype(gfp_t gfp_flags)
+static inline int gfpflags_to_migratetype(const gfp_t gfp_flags)
{
WARN_ON((gfp_flags & GFP_MOVABLE_MASK) == GFP_MOVABLE_MASK);

diff --git a/mm/compaction.c b/mm/compaction.c
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1096,7 +1096,7 @@ static unsigned long compact_zone_order(struct zone *zone, int order,
.nr_freepages = 0,
.nr_migratepages = 0,
.order = order,
- .migratetype = allocflags_to_migratetype(gfp_mask),
+ .migratetype = gfpflags_to_migratetype(gfp_mask),
.zone = zone,
.mode = mode,
};
@@ -1145,7 +1145,7 @@ unsigned long try_to_compact_pages(struct zonelist *zonelist,
count_compact_event(COMPACTSTALL);

#ifdef CONFIG_CMA
- if (allocflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE)
+ if (gfpflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE)
alloc_flags |= ALLOC_CMA;
#endif
/* Compact each zone in the list */
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2473,7 +2473,7 @@ gfp_to_alloc_flags(gfp_t gfp_mask)
alloc_flags |= ALLOC_NO_WATERMARKS;
}
#ifdef CONFIG_CMA
- if (allocflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE)
+ if (gfpflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE)
alloc_flags |= ALLOC_CMA;
#endif
return alloc_flags;
@@ -2716,7 +2716,7 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order,
struct zone *preferred_zone;
struct zoneref *preferred_zoneref;
struct page *page = NULL;
- int migratetype = allocflags_to_migratetype(gfp_mask);
+ int migratetype = gfpflags_to_migratetype(gfp_mask);
unsigned int cpuset_mems_cookie;
int alloc_flags = ALLOC_WMARK_LOW|ALLOC_CPUSET|ALLOC_FAIR;
int classzone_idx;
@@ -2750,7 +2750,7 @@ retry_cpuset:
classzone_idx = zonelist_zone_idx(preferred_zoneref);

#ifdef CONFIG_CMA
- if (allocflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE)
+ if (gfpflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE)
alloc_flags |= ALLOC_CMA;
#endif