From: Ben Hutchings Date: Tue, 14 Jun 2016 20:13:24 +0100 Subject: [PATCH 6/7] liblockdep: Fix 'set but not used' warnings Forwarded: http://mid.gmane.org/20160614204900.GY7555@decadent.org.uk liblockdep defines trivial macros for working with interrupt flags, as interrupts are never disabled in userland. This results in warnings from gcc when -Wunused-but-set-variable is enabled, and it is enabled by -Wall. Fix this by evaluating the flags parameter and casting it to void. Signed-off-by: Ben Hutchings --- tools/lib/lockdep/uinclude/linux/irqflags.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tools/lib/lockdep/uinclude/linux/irqflags.h b/tools/lib/lockdep/uinclude/linux/irqflags.h index 6cc296f0fad0..df77669cfe1c 100644 --- a/tools/lib/lockdep/uinclude/linux/irqflags.h +++ b/tools/lib/lockdep/uinclude/linux/irqflags.h @@ -17,19 +17,19 @@ #define raw_local_irq_disable() do { } while (0) #define raw_local_irq_enable() do { } while (0) #define raw_local_irq_save(flags) ((flags) = 0) -#define raw_local_irq_restore(flags) do { } while (0) +#define raw_local_irq_restore(flags) ((void)(flags)) #define raw_local_save_flags(flags) ((flags) = 0) -#define raw_irqs_disabled_flags(flags) do { } while (0) +#define raw_irqs_disabled_flags(flags) ((void)(flags)) #define raw_irqs_disabled() 0 #define raw_safe_halt() #define local_irq_enable() do { } while (0) #define local_irq_disable() do { } while (0) #define local_irq_save(flags) ((flags) = 0) -#define local_irq_restore(flags) do { } while (0) +#define local_irq_restore(flags) ((void)(flags)) #define local_save_flags(flags) ((flags) = 0) #define irqs_disabled() (1) -#define irqs_disabled_flags(flags) (0) +#define irqs_disabled_flags(flags) ((void)(flags), 0) #define safe_halt() do { } while (0) #define trace_lock_release(x, y)