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ksm: fix m68k build: only NUMA needs pfn_to_nid 

A CONFIG_DISCONTIGMEM=y m68k config gave

  mm/ksm.c: In function `get_kpfn_nid':
  mm/ksm.c:492: error: implicit declaration of function `pfn_to_nid'

linux/mmzone.h declares it for CONFIG_SPARSEMEM and CONFIG_FLATMEM, but
expects the arch's asm/mmzone.h to declare it for CONFIG_DISCONTIGMEM
(see arch/mips/include/asm/mmzone.h for example).

Or perhaps it is only expected when CONFIG_NUMA=y: too much of a maze,
and m68k got away without it so far, so fix the build in mm/ksm.c.

Signed-off-by: Hugh Dickins <hughd@google.com>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Petr Holasek <pholasek@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hugh Dickins 2013-03-08 12:43:34 -08:00 committed by Linus Torvalds
parent a40e7cf8f0
commit d8fc16a825
1 changed files with 1 additions and 1 deletions
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2
mm/ksm.c
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@ -489,7 +489,7 @@ out: page = NULL;
*/
static inline int get_kpfn_nid(unsigned long kpfn)
{
return ksm_merge_across_nodes ? 0 : pfn_to_nid(kpfn);
return ksm_merge_across_nodes ? 0 : NUMA(pfn_to_nid(kpfn));
}
static void remove_node_from_stable_tree(struct stable_node *stable_node)