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shmem: fix compilation warnings on unused functions

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Compiling shmem.c with SHMEM and TRANSAPRENT_HUGE_PAGECACHE enabled
raises warnings on two unused functions when CONFIG_TMPFS and
CONFIG_SYSFS are both disabled:

  mm/shmem.c:390:20: warning: `shmem_format_huge' defined but not used [-Wunused-function]
   static const char *shmem_format_huge(int huge)
                      ^~~~~~~~~~~~~~~~~
  mm/shmem.c:373:12: warning: `shmem_parse_huge' defined but not used [-Wunused-function]
   static int shmem_parse_huge(const char *str)
               ^~~~~~~~~~~~~~~~

A conditional compilation on tmpfs or sysfs removes the warnings.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Jérémy Lefaure <[email protected]>
Acked-by: Hugh Dickins <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Jérémy Lefaure 2016-12-12 16:43:23 -08:00 • committed by Linus Torvalds
commit f1f5929cd9
1 changed files with 2 additions and 0 deletions
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2
mm/shmem.c
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@ -370,6 +370,7 @@ static bool shmem_confirm_swap(struct address_space *mapping,
int shmem_huge __read_mostly;
#if defined(CONFIG_SYSFS) || defined(CONFIG_TMPFS)
static int shmem_parse_huge(const char *str)
{
if (!strcmp(str, "never"))
@ -407,6 +408,7 @@ static const char *shmem_format_huge(int huge)
return "bad_val";
}
}
#endif
static unsigned long shmem_unused_huge_shrink(struct shmem_sb_info *sbinfo,
struct shrink_control *sc, unsigned long nr_to_split)