The patch titled
Subject: libgcc: add forward declarations for generic library routines
has been added to the -mm mm-nonmm-unstable branch. Its filename is
libgcc-add-forward-declarations-for-generic-library-routines.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/libgcc-add-forward-declarations-for-generic-library-routines.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: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Subject: libgcc: add forward declarations for generic library routines
Date: Fri, 21 Apr 2023 16:54:24 +0200
With W=1 on platforms that use the generic gcc library routines
(csky/loongarch/mips/riscv/sh/xtensa):
lib/ashldi3.c:9:19: warning: no previous prototype for '__ashldi3' [-Wmissing-prototypes]
9 | long long notrace __ashldi3(long long u, word_type b)
| ^~~~~~~~~
CC lib/ashrdi3.o
lib/ashrdi3.c:9:19: warning: no previous prototype for '__ashrdi3' [-Wmissing-prototypes]
9 | long long notrace __ashrdi3(long long u, word_type b)
| ^~~~~~~~~
CC lib/cmpdi2.o
lib/cmpdi2.c:9:19: warning: no previous prototype for '__cmpdi2' [-Wmissing-prototypes]
9 | word_type notrace __cmpdi2(long long a, long long b)
| ^~~~~~~~
CC lib/lshrdi3.o
lib/lshrdi3.c:9:19: warning: no previous prototype for '__lshrdi3' [-Wmissing-prototypes]
9 | long long notrace __lshrdi3(long long u, word_type b)
| ^~~~~~~~~
CC lib/muldi3.o
lib/muldi3.c:49:19: warning: no previous prototype for '__muldi3' [-Wmissing-prototypes]
49 | long long notrace __muldi3(long long u, long long v)
| ^~~~~~~~
CC lib/ucmpdi2.o
lib/ucmpdi2.c:8:19: warning: no previous prototype for '__ucmpdi2' [-Wmissing-prototypes]
8 | word_type notrace __ucmpdi2(unsigned long long a, unsigned long long b)
| ^~~~~~~~~
Fix this by adding forward declarations to the common libgcc header
file.
Link: https://lkml.kernel.org/r/5cdbe08296693dd53849f199c3933e16e97b33c1.1682088593.git.geert+renesas@xxxxxxxxx
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Link: https://lore.kernel.org/oe-kbuild-all/202303272214.RxzpA6bP-lkp@xxxxxxxxx/
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Chris Zankel <chris@xxxxxxxxxx>
Cc: Max Filippov <jcmvbkbc@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/libgcc.h | 7 +++++++
1 file changed, 7 insertions(+)
--- a/include/linux/libgcc.h~libgcc-add-forward-declarations-for-generic-library-routines
+++ a/include/linux/libgcc.h
@@ -27,4 +27,11 @@ typedef union {
long long ll;
} DWunion;
+long long notrace __ashldi3(long long u, word_type b);
+long long notrace __ashrdi3(long long u, word_type b);
+word_type notrace __cmpdi2(long long a, long long b);
+long long notrace __lshrdi3(long long u, word_type b);
+long long notrace __muldi3(long long u, long long v);
+word_type notrace __ucmpdi2(unsigned long long a, unsigned long long b);
+
#endif /* __ASM_LIBGCC_H */
_
Patches currently in -mm which might be from geert+renesas@xxxxxxxxx are
libgcc-add-forward-declarations-for-generic-library-routines.patch
