linux-kernel - [tip: sched/core] sched/topology,x86: Fix build warning

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Message-ID: <176061369966.709179.2557895434975882601.tip-bot2@tip-bot2>
Date: Thu, 16 Oct 2025 11:21:39 -0000
From: "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Borislav Petkov <bp@...en8.de>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: sched/core] sched/topology,x86: Fix build warning

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     73cbcfe255f7edca915d978a7d1b0a11f2d62812
Gitweb:        https://git.kernel.org/tip/73cbcfe255f7edca915d978a7d1b0a11f2d62812
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Thu, 16 Oct 2025 12:58:34 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Thu, 16 Oct 2025 13:01:15 +02:00

sched/topology,x86: Fix build warning

A compile warning slipped through:

   arch/x86/kernel/smpboot.c:548:5: warning: no previous prototype for function 'arch_sched_node_distance' [-Wmissing-prototypes]

Fixes: 4d6dd05d07d0 ("sched/topology: Fix sched domain build error for GNR, CWF in SNC-3 mode")
Reported-by: Borislav Petkov <bp@...en8.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 arch/x86/include/asm/topology.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index 2104189..df94388 100644
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -325,4 +325,6 @@ static inline void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled
 extern void arch_scale_freq_tick(void);
 #define arch_scale_freq_tick arch_scale_freq_tick
 
+extern int arch_sched_node_distance(int from, int to);
+
 #endif /* _ASM_X86_TOPOLOGY_H */