Compiling shmem.c with CONFIG_SHMEM and
CONFIG_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.
Signed-off-by: Jérémy Lefaure <jeremy.lefaure@xxxxxxxxxxxx>
---
mm/shmem.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/shmem.c b/mm/shmem.c
index 2c74186..99595d8 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -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)
--
2.10.2
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