linux-kernel - [PATCH] smp: make __smp_processor

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Message-ID: <0037d1f2-8153-4b33-b43e-f4b6ecd710ac@p183>
Date: Mon, 5 Feb 2024 12:39:30 +0300
From: Alexey Dobriyan <adobriyan@...il.com>
To: peterz@...radead.org, akpm@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] smp: make __smp_processor_id() 0-argument macro

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@...il.com>
---

 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