# git rev-parse -q --verify fe663df7825811358531dc2e8a52d9eaa5e3515e^{commit} fe663df7825811358531dc2e8a52d9eaa5e3515e already have revision, skipping fetch # git checkout -q -f -B kisskb fe663df7825811358531dc2e8a52d9eaa5e3515e # git clean -qxdf # < git log -1 # commit fe663df7825811358531dc2e8a52d9eaa5e3515e # Author: Anders Roxell # Date: Fri Feb 11 01:51:13 2022 +0100 # # powerpc/lib/sstep: fix 'ptesync' build error # # Building tinyconfig with gcc (Debian 11.2.0-16) and assembler (Debian # 2.37.90.20220207) the following build error shows up: # # {standard input}: Assembler messages: # {standard input}:2088: Error: unrecognized opcode: `ptesync' # make[3]: *** [/builds/linux/scripts/Makefile.build:287: arch/powerpc/lib/sstep.o] Error 1 # # Add the 'ifdef CONFIG_PPC64' around the 'ptesync' in function # 'emulate_update_regs()' to like it is in 'analyse_instr()'. Since it looks like # it got dropped inadvertently by commit 3cdfcbfd32b9 ("powerpc: Change # analyse_instr so it doesn't modify *regs"). # # A key detail is that analyse_instr() will never recognise lwsync or # ptesync on 32-bit (because of the existing ifdef), and as a result # emulate_update_regs() should never be called with an op specifying # either of those on 32-bit. So removing them from emulate_update_regs() # should be a nop in terms of runtime behaviour. # # Fixes: 3cdfcbfd32b9 ("powerpc: Change analyse_instr so it doesn't modify *regs") # Cc: stable@vger.kernel.org # v4.14+ # Suggested-by: Arnd Bergmann # Signed-off-by: Anders Roxell # [mpe: Add last paragraph of change log mentioning analyse_instr() details] # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20220211005113.1361436-1-anders.roxell@linaro.org # < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version # < git log --format=%s --max-count=1 fe663df7825811358531dc2e8a52d9eaa5e3515e # < make -s -j 80 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86-allmodconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux- allmodconfig # Added to kconfig CONFIG_BUILD_DOCSRC=n # Added to kconfig CONFIG_MODULE_SIG=n # Added to kconfig CONFIG_SAMPLES=n # < make -s -j 80 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86-allmodconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux- help # make -s -j 80 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86-allmodconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux- olddefconfig # make -s -j 80 ARCH=x86 O=/kisskb/build/powerpc-fixes_x86-allmodconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux- vmlinux.o: warning: objtool: __do_fast_syscall_32()+0xa: call to stackleak_track_stack() leaves .noinstr.text section vmlinux.o: warning: objtool: do_syscall_64()+0x9: call to stackleak_track_stack() leaves .noinstr.text section vmlinux.o: warning: objtool: do_int80_syscall_32()+0x9: call to stackleak_track_stack() leaves .noinstr.text section vmlinux.o: warning: objtool: exc_general_protection()+0x22: call to stackleak_track_stack() leaves .noinstr.text section vmlinux.o: warning: objtool: fixup_bad_iret()+0x20: call to stackleak_track_stack() leaves .noinstr.text section vmlinux.o: warning: objtool: mce_start()+0x5c: call to __kasan_check_write() leaves .noinstr.text section vmlinux.o: warning: objtool: mce_gather_info()+0x5f: call to v8086_mode.constprop.0() leaves .noinstr.text section vmlinux.o: warning: objtool: mce_read_aux()+0x8a: call to mca_msr_reg() leaves .noinstr.text section vmlinux.o: warning: objtool: do_machine_check()+0x27: call to stackleak_track_stack() leaves .noinstr.text section vmlinux.o: warning: objtool: mce_severity_amd.constprop.0()+0xca: call to mce_severity_amd_smca() leaves .noinstr.text section vmlinux.o: warning: objtool: .text+0x533ae: call to stackleak_erase() leaves .noinstr.text section vmlinux.o: warning: objtool: .entry.text+0x143: call to stackleak_erase() leaves .noinstr.text section vmlinux.o: warning: objtool: .entry.text+0x10eb: call to stackleak_erase() leaves .noinstr.text section vmlinux.o: warning: objtool: .entry.text+0x17f9: call to stackleak_erase() leaves .noinstr.text section Completed OK # rm -rf /kisskb/build/powerpc-fixes_x86-allmodconfig_x86_64-gcc11 # Build took: 0:39:15.403294