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...

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@arndb.de 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@kernel.org Fixes: 7d4df2dad312 ("kcov: properly check for softirq context") Signed-off-by: Arnd Bergmann arnd@arndb.de Reviewed-by: Marco Elver elver@google.com Cc: Aleksandr Nogikh nogikh@google.com Cc: Andrey Konovalov andreyknvl@gmail.com Cc: Dmitry Vyukov dvyukov@google.com Cc: Josh Poimboeuf jpoimboe@kernel.org Cc: Peter Zijlstra peterz@infradead.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

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@arndb.de are

kcov-mark-in_softirq_really-as-__always_inline.patch