Messages in this thread Patch in this message | | | Date | Wed, 14 Mar 2018 12:25:14 -0700 | From | tip-bot for Arnd Bergmann <> | Subject | [tip:core/debugobjects] debugobjects: Avoid another unused variable warning |
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Commit-ID: 163cf842f5837334bc69aaf09ad38e11f4573914 Gitweb: https://git.kernel.org/tip/163cf842f5837334bc69aaf09ad38e11f4573914 Author: Arnd Bergmann <arnd@arndb.de> AuthorDate: Tue, 13 Mar 2018 14:18:46 +0100 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Wed, 14 Mar 2018 20:20:01 +0100
debugobjects: Avoid another unused variable warning
debug_objects_maxchecked is only updated in __debug_check_no_obj_freed(), and only read in debug_objects_maxchecked, unfortunately both of these are optional and depend on different Kconfig symbols.
When both CONFIG_DEBUG_OBJECTS_FREE and CONFIG_DEBUG_FS are disabled this warning is emitted:
lib/debugobjects.c:56:14: error: 'debug_objects_maxchecked' defined but not used [-Werror=unused-variable]
Rather than trying to add more complex #ifdef protections, mark the variable as __maybe_unused so it can be silently dropped when usused.
Fixes: bd9dcd046509 ("debugobjects: Export max loops counter") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Yang Shi <yang.shi@linux.alibaba.com> Cc: Waiman Long <longman@redhat.com> Link: https://lkml.kernel.org/r/20180313131857.158876-1-arnd@arndb.de
--- lib/debugobjects.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/debugobjects.c b/lib/debugobjects.c index 105ecfc47d8c..994be4805cec 100644 --- a/lib/debugobjects.c +++ b/lib/debugobjects.c @@ -53,7 +53,7 @@ static int obj_nr_tofree; static struct kmem_cache *obj_cache; static int debug_objects_maxchain __read_mostly; -static int debug_objects_maxchecked __read_mostly; +static int __maybe_unused debug_objects_maxchecked __read_mostly; static int debug_objects_fixups __read_mostly; static int debug_objects_warnings __read_mostly; static int debug_objects_enabled __read_mostly
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