When lockdep is disabled, a call to lockdep_assert_held
does not use its argument, which results in a compiler
warning if nothing else in the same function uses
that variable. An instance of this was introduced
by c9a49628819 "nfsd: make client_lock per net".
Without this patch, building ARM cerfcube_defconfig results in:
fs/nfsd/nfs4state.c: In function 'free_client':
fs/nfsd/nfs4state.c:1047:19: error: unused variable 'nn' [-Wunused-variable]
Signed-off-by: Arnd Bergmann <a...@arndb.de>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Stanislav Kinsbursky <skinsbur...@parallels.com>
---
include/linux/lockdep.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 2bca44b..f05631e 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -410,7 +410,7 @@ struct lock_class_key { };
#define lockdep_depth(tsk) (0)
-#define lockdep_assert_held(l) do { } while (0)
+#define lockdep_assert_held(l) do { (void)(l); } while (0)
#define lockdep_recursing(tsk) (0)
--
1.8.0
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