From: Heiko Carstens Date: Fri, 26 Sep 2025 13:39:10 +0000 (+0200) Subject: s390: Add -Wno-pointer-sign to KBUILD_CFLAGS_DECOMPRESSOR X-Git-Tag: v6.18-rc1~33^2~6 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fa7a0a53eeb7e16402f82c3d5a9ef4bf5efe9357;p=thirdparty%2Fkernel%2Fstable.git s390: Add -Wno-pointer-sign to KBUILD_CFLAGS_DECOMPRESSOR 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 Signed-off-by: Heiko Carstens Reviewed-by: Alexander Gordeev Signed-off-by: Alexander Gordeev --- diff --git a/arch/s390/Makefile b/arch/s390/Makefile index 7679bc16b692b..b4769241332bb 100644 --- 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