[PATCH] mm/slub: fix -Wunused-function compiler warnings

Qian Cai
2019-09-17T20:30:46Z

tid_to_cpu() and tid_to_event() are only used in note_cmpxchg_failure()
when SLUB_DEBUG_CMPXCHG=y, so when SLUB_DEBUG_CMPXCHG=n by default,
Clang will complain that those unused functions.

Signed-off-by: Qian Cai <cai@lca.pw>
---
mm/slub.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/mm/slub.c b/mm/slub.c
index 8834563cdb4b..49739f005b4f 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2004,6 +2004,7 @@ static inline unsigned long next_tid(unsigned long tid)
return tid + TID_STEP;
}

+#ifdef SLUB_DEBUG_CMPXCHG
static inline unsigned int tid_to_cpu(unsigned long tid)
{
return tid % TID_STEP;
@@ -2013,6 +2014,7 @@ static inline unsigned long tid_to_event(unsigned long tid)
{
return tid / TID_STEP;
}
+#endif

static inline unsigned int init_tid(int cpu)
{
--
1.8.3.1