6.12-stable review patch. If anyone has any objections, please let me know.
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From: Heiko Carstens hca@linux.ibm.com
commit fa7a0a53eeb7e16402f82c3d5a9ef4bf5efe9357 upstream.
If the decompressor is compiled with clang this can lead to the following warning:
In file included from arch/s390/boot/startup.c:4: ... In file included from ./include/linux/pgtable.h:6: ./arch/s390/include/asm/pgtable.h:2065:48: warning: passing 'unsigned long *' to parameter of type 'long *' converts between pointers to integer types with different sign [-Wpointer-sign] 2065 | value = __atomic64_or_barrier(PGSTE_PCL_BIT, ptr);
Add -Wno-pointer-sign to the decompressor compile flags, like it is also done for the kernel. This is similar to what was done for x86 to address the same problem [1].
[1] commit dca5203e3fe2 ("x86/boot: Add -Wno-pointer-sign to KBUILD_CFLAGS")
Cc: stable@vger.kernel.org Reported-by: Gerd Bayer gbayer@linux.ibm.com Signed-off-by: Heiko Carstens hca@linux.ibm.com Reviewed-by: Alexander Gordeev agordeev@linux.ibm.com Signed-off-by: Alexander Gordeev agordeev@linux.ibm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/s390/Makefile | 1 + 1 file changed, 1 insertion(+)
--- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -25,6 +25,7 @@ endif KBUILD_CFLAGS_DECOMPRESSOR := $(CLANG_FLAGS) -m64 -O2 -mpacked-stack -std=gnu11 KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY KBUILD_CFLAGS_DECOMPRESSOR += -D__DECOMPRESSOR +KBUILD_CFLAGS_DECOMPRESSOR += -Wno-pointer-sign KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbackchain KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding