Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | Arnd Bergmann <> | Subject | [PATCH] [v2] irqflags: explicitly ignore lockdep_hrtimer_exit() argument | Date | Mon, 8 Apr 2024 09:46:01 +0200 |
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From: Arnd Bergmann <arnd@arndb.de>
When building with 'make W=1' but CONFIG_TRACE_IRQFLAGS=n, the unused argument to lockdep_hrtimer_exit() causes a warning:
kernel/time/hrtimer.c:1655:14: error: variable 'expires_in_hardirq' set but not used [-Werror=unused-but-set-variable]
This is intentional behavior, so add a cast to void to shut up the warning.
Fixes: 73d20564e0dc ("hrtimer: Don't dereference the hrtimer pointer after the callback") Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202311191229.55QXHVc6-lkp@intel.com/ Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- Reposting my patch, please apply this one or the identical one from https://lore.kernel.org/lkml/20231120153953.kGBSHe5j@linutronix.de/ --- include/linux/irqflags.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h index 147feebd508c..3f003d5fde53 100644 --- a/include/linux/irqflags.h +++ b/include/linux/irqflags.h @@ -114,7 +114,7 @@ do { \ # define lockdep_softirq_enter() do { } while (0) # define lockdep_softirq_exit() do { } while (0) # define lockdep_hrtimer_enter(__hrtimer) false -# define lockdep_hrtimer_exit(__context) do { } while (0) +# define lockdep_hrtimer_exit(__context) do { (void)(__context); } while (0) # define lockdep_posixtimer_enter() do { } while (0) # define lockdep_posixtimer_exit() do { } while (0) # define lockdep_irq_work_enter(__work) do { } while (0) -- 2.39.2
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