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authorMel Gorman <mgorman@techsingularity.net>2021-07-01 04:53:56 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-07-01 21:06:03 +0300
commit351de44fde5afc3b0b23294ebf404e78065c2745 (patch)
tree0030ed8eef5ed9c7107185b6317d40728383196a /include/linux/mmzone.h
parentffd8f251f1a61e592aa3146d2c3cfb6a992e80f2 (diff)
downloadlinux-351de44fde5afc3b0b23294ebf404e78065c2745.tar.xz
mm/swap: make NODE_DATA an inline function on CONFIG_FLATMEM
make W=1 generates the following warning in mm/workingset.c for allnoconfig mm/workingset.c: In function `unpack_shadow': mm/workingset.c:201:15: warning: variable `nid' set but not used [-Wunused-but-set-variable] int memcgid, nid; ^~~ On FLATMEM, NODE_DATA returns a global pglist_data without dereferencing nid. Make the helper an inline function to suppress the warning, add type checking and to apply any side-effects in the parameter list. Link: https://lkml.kernel.org/r/20210520084809.8576-15-mgorman@techsingularity.net Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Reviewed-by: Yang Shi <shy828301@gmail.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Dan Streetman <ddstreet@ieee.org> Cc: David Hildenbrand <david@redhat.com> Cc: Michal Hocko <mhocko@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mmzone.h')
-rw-r--r--include/linux/mmzone.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 0ed2c23ed3fb..fcb535560028 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -1064,7 +1064,10 @@ extern char numa_zonelist_order[];
#ifndef CONFIG_NUMA
extern struct pglist_data contig_page_data;
-#define NODE_DATA(nid) (&contig_page_data)
+static inline struct pglist_data *NODE_DATA(int nid)
+{
+ return &contig_page_data;
+}
#define NODE_MEM_MAP(nid) mem_map
#else /* CONFIG_NUMA */