5.15-stable review patch. If anyone has any objections, please let me know.
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From: Arnd Bergmann arnd@arndb.de
commit cb0ca08b326aa03f87fe94bb91872ce8d2ef1ed8 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- kernel/kcov.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/kcov.c +++ b/kernel/kcov.c @@ -155,7 +155,7 @@ 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(); }