[PATCH] smp: make __smp_processor_id() 0-argument macro

From: Alexey Dobriyan
Date: Mon Feb 05 2024 - 04:41:06 EST


smp_processor_id family of macros never accepted any arguments.

#define __smp_processor_id(x)

works by accident (see C99 6.10.3 §4). __smp_processor_id() gets
1 (empty) argument and passes it down to raw_smp_processor_id()
which doesn't accept arguments.

Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
---

include/linux/smp.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -261,7 +261,7 @@ static inline int get_boot_cpu_id(void)
* regular asm read for the stable.
*/
#ifndef __smp_processor_id
-#define __smp_processor_id(x) raw_smp_processor_id(x)
+#define __smp_processor_id() raw_smp_processor_id()
#endif

#ifdef CONFIG_DEBUG_PREEMPT