The patch titled
Subject: include/linux/mmzone.h: cleanups
has been added to the -mm tree. Its filename is
include-linux-mmzoneh-cleanups.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: include/linux/mmzone.h: cleanups
- implement zone_idx() in C to fix its references-args-twice macro bug
- use zone_idx() in is_highmem() to remove large amounts of silly fluff.
Cc: Lin Feng <linfeng@xxxxxxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mmzone.h | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff -puN include/linux/mmzone.h~include-linux-mmzoneh-cleanups include/linux/mmzone.h
--- a/include/linux/mmzone.h~include-linux-mmzoneh-cleanups
+++ a/include/linux/mmzone.h
@@ -815,7 +815,10 @@ unsigned long __init node_memmap_size_by
/*
* zone_idx() returns 0 for the ZONE_DMA zone, 1 for the ZONE_NORMAL zone, etc.
*/
-#define zone_idx(zone) ((zone) - (zone)->zone_pgdat->node_zones)
+static inline enum zone_type zone_idx(struct zone *zone)
+{
+ return zone - zone->zone_pgdat->node_zones;
+}
static inline int populated_zone(struct zone *zone)
{
@@ -857,10 +860,10 @@ static inline int is_normal_idx(enum zon
static inline int is_highmem(struct zone *zone)
{
#ifdef CONFIG_HIGHMEM
- int zone_off = (char *)zone - (char *)zone->zone_pgdat->node_zones;
- return zone_off == ZONE_HIGHMEM * sizeof(*zone) ||
- (zone_off == ZONE_MOVABLE * sizeof(*zone) &&
- zone_movable_is_highmem());
+ enum zone_type idx = zone_idx(zone);
+
+ return idx == ZONE_HIGHMEM ||
+ (idx == ZONE_MOVABLE && zone_movable_is_highmem());
#else
return 0;
#endif
_
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