diff options
| author | Clement Courbet <courbet@google.com> | 2020-03-30 10:03:56 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-04-01 14:30:51 +1100 |
| commit | c17eb4dca5a353a9dbbb8ad6934fe57af7165e91 (patch) | |
| tree | 48c53baee0dce0a32bf5562565eb539373372a59 | |
| parent | 41b8426fdb59218f56a6e3b3facd43a82816e3eb (diff) | |
powerpc: Make setjmp/longjmp signature standard
Declaring setjmp()/longjmp() as taking longs makes the signature
non-standard, and makes clang complain. In the past, this has been
worked around by adding -ffreestanding to the compile flags.
The implementation looks like it only ever propagates the value
(in longjmp) or sets it to 1 (in setjmp), and we only call longjmp
with integer parameters.
This allows removing -ffreestanding from the compilation flags.
Fixes: c9029ef9c957 ("powerpc: Avoid clang warnings around setjmp and longjmp")
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Clement Courbet <courbet@google.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200330080400.124803-1-courbet@google.com
| -rw-r--r-- | arch/powerpc/include/asm/setjmp.h | 6 | ||||
| -rw-r--r-- | arch/powerpc/kexec/Makefile | 3 | ||||
| -rw-r--r-- | arch/powerpc/xmon/Makefile | 3 |
3 files changed, 4 insertions, 8 deletions
diff --git a/arch/powerpc/include/asm/setjmp.h b/arch/powerpc/include/asm/setjmp.h index e9f81bb3f83b..f798e80e4106 100644 --- a/arch/powerpc/include/asm/setjmp.h +++ b/arch/powerpc/include/asm/setjmp.h @@ -7,7 +7,9 @@ #define JMP_BUF_LEN 23 -extern long setjmp(long *) __attribute__((returns_twice)); -extern void longjmp(long *, long) __attribute__((noreturn)); +typedef long jmp_buf[JMP_BUF_LEN]; + +extern int setjmp(jmp_buf env) __attribute__((returns_twice)); +extern void longjmp(jmp_buf env, int val) __attribute__((noreturn)); #endif /* _ASM_POWERPC_SETJMP_H */ diff --git a/arch/powerpc/kexec/Makefile b/arch/powerpc/kexec/Makefile index 378f6108a414..86380c69f5ce 100644 --- a/arch/powerpc/kexec/Makefile +++ b/arch/powerpc/kexec/Makefile @@ -3,9 +3,6 @@ # Makefile for the linux kernel. # -# Avoid clang warnings around longjmp/setjmp declarations -CFLAGS_crash.o += -ffreestanding - obj-y += core.o crash.o core_$(BITS).o obj-$(CONFIG_PPC32) += relocate_32.o diff --git a/arch/powerpc/xmon/Makefile b/arch/powerpc/xmon/Makefile index c3842dbeb1b7..6f9cccea54f3 100644 --- a/arch/powerpc/xmon/Makefile +++ b/arch/powerpc/xmon/Makefile @@ -1,9 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 # Makefile for xmon -# Avoid clang warnings around longjmp/setjmp declarations -subdir-ccflags-y := -ffreestanding - GCOV_PROFILE := n KCOV_INSTRUMENT := n UBSAN_SANITIZE := n |