irq_work: Drop cmpxchg() result

The compiler warned us about:

 kernel/irq_work.c: In function 'irq_work_run':
 kernel/irq_work.c:148: warning: value computed is not used

Dropping the cmpxchg() result is indeed weird, but correct -
so annotate away the warning.

Signed-off-by: Sergio Aguirre <saaguirre@ti.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1289930567-17828-1-git-send-email-saaguirre@ti.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/irq_work.c b/kernel/irq_work.c
index f16763ff8481b727bdf0263c241ddf2e1d6ba09a..90f881904bb1202ba1566f5db2e28eaf128551b9 100644 (file)
--- a/kernel/irq_work.c
+++ b/kernel/irq_work.c
@@ -145,7 +145,9 @@ void irq_work_run(void)
                 * Clear the BUSY bit and return to the free state if
                 * no-one else claimed it meanwhile.
                 */
-               cmpxchg(&entry->next, next_flags(NULL, IRQ_WORK_BUSY), NULL);
+               (void)cmpxchg(&entry->next,
+                             next_flags(NULL, IRQ_WORK_BUSY),
+                             NULL);
        }
 }
 EXPORT_SYMBOL_GPL(irq_work_run);