mm: rename allocflags_to_migratetype for clarity

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>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 5 insertions, 5 deletions

diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 5e7219dc0fae..41b30fd4d041 100644
--- 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
index b9cf751cc00e..7c687c0eef6e 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1242,7 +1242,7 @@ 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,
         };
@@ -1294,7 +1294,7 @@ unsigned long try_to_compact_pages(struct zonelist *zonelist,
                 return COMPACT_SKIPPED;
 
 #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
index 313338d74095..f07588b11d59 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2523,7 +2523,7 @@ 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;
@@ -2786,7 +2786,7 @@ __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;