* [PATCH] sparc: Export mcount for Clang-built modules
@ 2026-05-08 2:11 Rosen Penev
0 siblings, 0 replies; only message in thread
From: Rosen Penev @ 2026-05-08 2:11 UTC (permalink / raw)
To: sparclinux
Cc: David S. Miller, Andreas Larsson, Nathan Chancellor,
Nick Desaulniers, Bill Wendling, Justin Stitt, open list,
open list:CLANG/LLVM BUILD SUPPORT:Keyword:b(?i:clang|llvm)b
Clang emits calls to mcount for -pg on sparc64, while the
existing ftrace support only exports the _mcount name. With
FUNCTION_TRACER enabled, modules can therefore keep relocations
against mcount and fail during modpost:
ERROR: modpost: "mcount" [arch/sparc/kernel/chmc.ko] undefined!
_mcount and mcount are aliases in arch/sparc/lib/mcount.S. Export
the plain mcount alias as well so Clang-built modules can resolve
their profiling call target.
Assisted-by: Codex:GPT-5
Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
arch/sparc/lib/mcount.S | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/sparc/lib/mcount.S b/arch/sparc/lib/mcount.S
index f7f7910eb41e..0309ba2c4712 100644
--- a/arch/sparc/lib/mcount.S
+++ b/arch/sparc/lib/mcount.S
@@ -21,6 +21,7 @@
EXPORT_SYMBOL(_mcount)
.globl mcount
.type mcount,#function
+ EXPORT_SYMBOL(mcount)
_mcount:
mcount:
#ifdef CONFIG_FUNCTION_TRACER
--
2.54.0
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