Messages in this thread | | | Date | Thu, 20 Feb 2020 19:10:33 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v2 2/2] lib: make a test module with set/clear bit |
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On Thu, Feb 20, 2020 at 09:37:22AM -0800, Jesse Brandeburg wrote: > Test some bit clears/sets to make sure assembly doesn't change. > Instruct Kbuild to build this file with extra warning level -Wextra, > to catch new issues, and also doesn't hurt to build with C=1. > > This was used to test changes to arch/x86/include/asm/bitops.h. > > Recommended usage: > make defconfig > scripts/config -m CONFIG_TEST_BITOPS > make modules_prepare > make C=1 W=1 lib/test_bitops.ko > objdump -S -d lib/test_bitops.ko
I only applied this second patch:
# sparse --version 0.6.0 (Debian: 0.6.0-3+b1)
# grep TEST_BITOPS defconfig-build/.config CONFIG_TEST_BITOPS=m
# make C=1 W=1 O=defconfig-build/ lib/test_bitops.ko make[1]: Entering directory '/usr/src/linux-2.6/defconfig-build' GEN Makefile HOSTCC scripts/basic/fixdep HOSTCC arch/x86/tools/relocs_32.o HOSTCC arch/x86/tools/relocs_64.o HOSTCC arch/x86/tools/relocs_common.o HOSTLD arch/x86/tools/relocs HOSTCC scripts/selinux/genheaders/genheaders HOSTCC scripts/selinux/mdp/mdp HOSTCC scripts/kallsyms HOSTCC scripts/sorttable HOSTCC scripts/asn1_compiler HOSTCC scripts/extract-cert HOSTCC scripts/mod/mk_elfconfig CHECK ../scripts/mod/empty.c CC scripts/mod/empty.o MKELF scripts/mod/elfconfig.h HOSTCC scripts/mod/modpost.o CC scripts/mod/devicetable-offsets.s HOSTCC scripts/mod/file2alias.o HOSTCC scripts/mod/sumversion.o HOSTLD scripts/mod/modpost CC kernel/bounds.s CC arch/x86/kernel/asm-offsets.s CALL ../scripts/checksyscalls.sh CALL ../scripts/atomic/check-atomics.sh DESCEND objtool HOSTCC /usr/src/linux-2.6/defconfig-build/tools/objtool/fixdep.o HOSTLD /usr/src/linux-2.6/defconfig-build/tools/objtool/fixdep-in.o LINK /usr/src/linux-2.6/defconfig-build/tools/objtool/fixdep CC /usr/src/linux-2.6/defconfig-build/tools/objtool/exec-cmd.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/help.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/pager.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/parse-options.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/run-command.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/sigchain.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/subcmd-config.o LD /usr/src/linux-2.6/defconfig-build/tools/objtool/libsubcmd-in.o AR /usr/src/linux-2.6/defconfig-build/tools/objtool/libsubcmd.a CC /usr/src/linux-2.6/defconfig-build/tools/objtool/arch/x86/decode.o LD /usr/src/linux-2.6/defconfig-build/tools/objtool/arch/x86/objtool-in.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/builtin-check.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/builtin-orc.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/check.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/orc_gen.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/orc_dump.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/elf.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/special.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/objtool.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/libstring.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/libctype.o CC /usr/src/linux-2.6/defconfig-build/tools/objtool/str_error_r.o LD /usr/src/linux-2.6/defconfig-build/tools/objtool/objtool-in.o LINK /usr/src/linux-2.6/defconfig-build/tools/objtool/objtool CHECK ../lib/test_bitops.c CC [M] lib/test_bitops.o MODPOST 1 modules CC [M] lib/test_bitops.mod.o LD [M] lib/test_bitops.ko make[1]: Leaving directory '/usr/src/linux-2.6/defconfig-build'
No warnings for me!
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