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mm/page_alloc.c: mark bad_range() and meminit_pfn_in_nid() as __maybe_unused 

The functions are not used in some configurations.  Adding the attribute
fixes the following warnings when building with clang:

  mm/page_alloc.c:409:19: error: function 'bad_range' is not needed and
      will not be emitted [-Werror,-Wunneeded-internal-declaration]

  mm/page_alloc.c:1106:30: error: unused function 'meminit_pfn_in_nid'
      [-Werror,-Wunused-function]

Link: http://lkml.kernel.org/r/20170518182030.165633-1-mka@chromium.org
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthias Kaehlcke 2017-07-06 15:39:23 -07:00 committed by Linus Torvalds
parent 40692eb5ee
commit d73d3c9f69
1 changed files with 8 additions and 6 deletions
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14
mm/page_alloc.c
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@ -511,7 +511,7 @@ static int page_is_consistent(struct zone *zone, struct page *page)
/*
* Temporary debugging check for pages not lying within a given zone.
*/
static int bad_range(struct zone *zone, struct page *page)
static int __maybe_unused bad_range(struct zone *zone, struct page *page)
{
if (page_outside_zone_boundaries(zone, page))
return 1;
@ -521,7 +521,7 @@ static int bad_range(struct zone *zone, struct page *page)
return 0;
}
#else
static inline int bad_range(struct zone *zone, struct page *page)
static inline int __maybe_unused bad_range(struct zone *zone, struct page *page)
{
return 0;
}
@ -1297,8 +1297,9 @@ int __meminit early_pfn_to_nid(unsigned long pfn)
#endif
#ifdef CONFIG_NODES_SPAN_OTHER_NODES
static inline bool __meminit meminit_pfn_in_nid(unsigned long pfn, int node,
struct mminit_pfnnid_cache *state)
static inline bool __meminit __maybe_unused
meminit_pfn_in_nid(unsigned long pfn, int node,
struct mminit_pfnnid_cache *state)
{
int nid;
@ -1320,8 +1321,9 @@ static inline bool __meminit early_pfn_in_nid(unsigned long pfn, int node)
{
return true;
}
static inline bool __meminit meminit_pfn_in_nid(unsigned long pfn, int node,
struct mminit_pfnnid_cache *state)
static inline bool __meminit __maybe_unused
meminit_pfn_in_nid(unsigned long pfn, int node,
struct mminit_pfnnid_cache *state)
{
return true;
}