Messages in this thread Patch in this message | | | From | Arnd Bergmann <> | Subject | [PATCH 08/19] lockdep: avoid warning about unused variables | Date | Fri, 25 Jan 2013 22:44:07 +0000 |
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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 <arnd@arndb.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Stanislav Kinsbursky <skinsbursky@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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