The patch titled
Subject: gcov: shut up missing prototype warnings for internal stubs
has been added to the -mm mm-nonmm-unstable branch. Its filename is
gcov-shut-up-missing-prototype-warnings-for-internal-stubs.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/gcov-shut-up-missing-prototype-warnings-for-internal-stubs.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Arnd Bergmann <arnd@xxxxxxxx>
Subject: gcov: shut up missing prototype warnings for internal stubs
Date: Tue, 25 Jul 2023 14:23:38 +0200
gcov uses global functions that are called from generated code, but these
have no prototype in a header, which causes a W=1 build warning:
kernel/gcov/gcc_base.c:12:6: error: no previous prototype for '__gcov_init' [-Werror=missing-prototypes]
kernel/gcov/gcc_base.c:40:6: error: no previous prototype for '__gcov_flush' [-Werror=missing-prototypes]
kernel/gcov/gcc_base.c:46:6: error: no previous prototype for '__gcov_merge_add' [-Werror=missing-prototypes]
kernel/gcov/gcc_base.c:52:6: error: no previous prototype for '__gcov_merge_single' [-Werror=missing-prototypes]
Just turn off these warnings unconditionally for the two files that
contain them.
Link: https://lore.kernel.org/all/0820010f-e9dc-779d-7924-49c7df446bce@xxxxxxxxxxxxx/
Link: https://lkml.kernel.org/r/20230725123042.2269077-1-arnd@xxxxxxxxxx
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Tested-by: Peter Oberparleiter <oberpar@xxxxxxxxxxxxx>
Acked-by: Peter Oberparleiter <oberpar@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/gcov/Makefile | 2 ++
1 file changed, 2 insertions(+)
--- a/kernel/gcov/Makefile~gcov-shut-up-missing-prototype-warnings-for-internal-stubs
+++ a/kernel/gcov/Makefile
@@ -3,4 +3,6 @@ ccflags-y := -DSRCTREE='"$(srctree)"' -D
obj-y := base.o fs.o
obj-$(CONFIG_CC_IS_GCC) += gcc_base.o gcc_4_7.o
+CFLAGS_gcc_base.o += -Wno-missing-prototypes -Wno-missing-declarations
obj-$(CONFIG_CC_IS_CLANG) += clang.o
+CFLAGS_clang.o += -Wno-missing-prototypes -Wno-missing-declarations
_
Patches currently in -mm which might be from arnd@xxxxxxxx are
iomem-remove-__weak-ioremap_cache-helper.patch
gcov-shut-up-missing-prototype-warnings-for-internal-stubs.patch
