Commit ae026b2a authored by Mel Gorman's avatar Mel Gorman Committed by Linus Torvalds
Browse files

mm, meminit: suppress unused memory variable warning

The kbuild test robot reported the following

  tree:   git:// master
  head:   14a6f198
  commit: 3b242c66 x86: mm: enable deferred struct page initialisation on x86-64
  date:   3 days ago
  config: x86_64-randconfig-x006-201527 (attached as .config)
    git checkout 3b242c66

    # save the attached .config to linux build tree
    make ARCH=x86_64

  All warnings (new ones prefixed by >>):

     mm/page_alloc.c: In function 'early_page_uninitialised':
  >> mm/page_alloc.c:247:6: warning: unused variable 'nid' [-Wunused-variable]
       int nid = early_pfn_to_nid(pfn);

It's due to the NODE_DATA macro ignoring the nid parameter on !NUMA
configurations.  This patch avoids the warning by not declaring nid.
Signed-off-by: default avatarMel Gorman <>
Reported-by: default avatarWu Fengguang <>
Cc: "Kirill A. Shutemov" <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 3958b792
......@@ -246,9 +246,7 @@ static inline void reset_deferred_meminit(pg_data_t *pgdat)
/* Returns true if the struct page for the pfn is uninitialised */
static inline bool __meminit early_page_uninitialised(unsigned long pfn)
int nid = early_pfn_to_nid(pfn);
if (pfn >= NODE_DATA(nid)->first_deferred_pfn)
if (pfn >= NODE_DATA(early_pfn_to_nid(pfn))->first_deferred_pfn)
return true;
return false;
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