# git rev-parse -q --verify c72f04dc46f466a7574a204bf2e965aa1c5cf277^{commit} c72f04dc46f466a7574a204bf2e965aa1c5cf277 already have revision, skipping fetch # git checkout -q -f -B kisskb c72f04dc46f466a7574a204bf2e965aa1c5cf277 # git clean -qxdf # < git log -1 # commit c72f04dc46f466a7574a204bf2e965aa1c5cf277 # Author: Petr Mladek # Date: Wed May 27 14:28:44 2020 +0200 # # powerpc/bpf: Enable bpf_probe_read{, str}() on powerpc again # # The commit 0ebeea8ca8a4d1d453a ("bpf: Restrict bpf_probe_read{, str}() # only to archs where they work") caused that bpf_probe_read{, str}() # functions were not longer available on architectures where the same # logical address might have different content in kernel and user memory # mapping. These architectures should use probe_read_{user,kernel}_str # helpers. # # For backward compatibility, the problematic functions are still # available on architectures where the user and kernel address spaces # are not overlapping. This is defined # CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE. # # At the moment, these backward compatible functions are enabled only on # x86_64, arm, and arm64. Let's do it also on powerpc that has the non # overlapping address space as well. # # Fixes: 0ebeea8ca8a4 ("bpf: Restrict bpf_probe_read{, str}() only to archs where they work") # Signed-off-by: Petr Mladek # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20200527122844.19524-1-pmladek@suse.com # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 c72f04dc46f466a7574a204bf2e965aa1c5cf277 # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc885_ads_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc885_ads_defconfig # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc885_ads_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc885_ads_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc885_ads_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- Image Name: Linux-5.7.0-rc2-gc72f04dc46f4 Created: Fri May 29 02:44:24 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 1959587 Bytes = 1913.66 KiB = 1.87 MiB Load Address: 00400000 Entry Point: 00400204 Completed OK # rm -rf /kisskb/build/powerpc-fixes_mpc885_ads_defconfig_powerpc-gcc4.9 # Build took: 0:00:50.196770