The patch titled
Subject: kcov: mark in_softirq_really() as __always_inline
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
kcov-mark-in_softirq_really-as-__always_inline.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kcov-mark-in_softirq_really-as-__always_inline.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Arnd Bergmann <arnd@xxxxxxxx>
Subject: kcov: mark in_softirq_really() as __always_inline
Date: Tue, 17 Dec 2024 08:18:10 +0100
If gcc decides not to inline in_softirq_really(), objtool warns about a
function call with UACCESS enabled:
kernel/kcov.o: warning: objtool: __sanitizer_cov_trace_pc+0x1e: call to in_softirq_really() with UACCESS enabled
kernel/kcov.o: warning: objtool: check_kcov_mode+0x11: call to in_softirq_really() with UACCESS enabled
Mark this as __always_inline to avoid the problem.
Link: https://lkml.kernel.org/r/20241217071814.2261620-1-arnd@xxxxxxxxxx
Fixes: 7d4df2dad312 ("kcov: properly check for softirq context")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Cc: Aleksandr Nogikh <nogikh@xxxxxxxxxx>
Cc: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/kcov.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/kcov.c~kcov-mark-in_softirq_really-as-__always_inline
+++ a/kernel/kcov.c
@@ -166,7 +166,7 @@ static void kcov_remote_area_put(struct
* Unlike in_serving_softirq(), this function returns false when called during
* a hardirq or an NMI that happened in the softirq context.
*/
-static inline bool in_softirq_really(void)
+static __always_inline bool in_softirq_really(void)
{
return in_serving_softirq() && !in_hardirq() && !in_nmi();
}
_
Patches currently in -mm which might be from arnd@xxxxxxxx are
kcov-mark-in_softirq_really-as-__always_inline.patch
