linux-kernel - Re: [PATCH v2.1 09/24] mips/cpu: Expose play

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Date:   Wed, 1 Mar 2023 10:16:39 -0800
From:   Josh Poimboeuf <jpoimboe@...nel.org>
To:     Philippe Mathieu-Daudé <philmd@...aro.org>
Cc:     linux-kernel@...r.kernel.org, jgross@...e.com,
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Subject: Re: [PATCH v2.1 09/24] mips/cpu: Expose play_dead()'s prototype
 definition

On Thu, Feb 16, 2023 at 10:42:52AM -0800, Josh Poimboeuf wrote:
> Include <asm/smp.h> to make sure play_dead() matches its prototype going
> forward.
> 
> Acked-by: Florian Fainelli <f.fainelli@...il.com>
> Reviewed-by: Philippe Mathieu-Daudé <philmd@...aro.org>
> Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>

The latest version of this patch triggered a new kbuild warning which is
fixed by the below patch.  If there are no objections I'll bundle it in
with the rest of the set for merging.

---8<---

Subject: [PATCH] mips/smp: Add CONFIG_SMP guard for raw_smp_processor_id()
Content-type: text/plain

Without CONFIG_SMP, raw_smp_processor_id() is not expected to be defined
by the arch.

Reported-by: kernel test robot <lkp@...el.com>
Link: https://lore.kernel.org/oe-kbuild-all/202302220755.HM8J8GOR-lkp@intel.com/
Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
---
 arch/mips/include/asm/smp.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/include/asm/smp.h b/arch/mips/include/asm/smp.h
index 4eee29b7845c..cf992b8b1e46 100644
--- a/arch/mips/include/asm/smp.h
+++ b/arch/mips/include/asm/smp.h
@@ -25,6 +25,7 @@ extern cpumask_t cpu_sibling_map[];
 extern cpumask_t cpu_core_map[];
 extern cpumask_t cpu_foreign_map[];
 
+#ifdef CONFIG_SMP
 static inline int raw_smp_processor_id(void)
 {
 #if defined(__VDSO__)
@@ -36,6 +37,7 @@ static inline int raw_smp_processor_id(void)
 #endif
 }
 #define raw_smp_processor_id raw_smp_processor_id
+#endif
 
 /* Map from cpu id to sequential logical cpu number.  This will only
    not be idempotent when cpus failed to come on-line.	*/
-- 
2.39.1