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e468f5c06b
This is an effort to disentangle the include/linux/compiler*.h headers and bring them up to date. The main idea behind the series is to use feature checking macros (i.e. __has_attribute) instead of compiler version checks (e.g. GCC_VERSION), which are compiler-agnostic (so they can be shared, reducing the size of compiler-specific headers) and version-agnostic. Other related improvements have been performed in the headers as well, which on top of the use of __has_attribute it has amounted to a significant simplification of these headers (e.g. GCC_VERSION is now only guarding a few non-attribute macros). This series should also help the efforts to support compiling the kernel with clang and icc. A fair amount of documentation and comments have also been added, clarified or removed; and the headers are now more readable, which should help kernel developers in general. The series was triggered due to the move to gcc >= 4.6. In turn, this series has also triggered Sparse to gain the ability to recognize __has_attribute on its own. Finally, the __nonstring variable attribute series has been also applied on top; plus two related patches from Nick Desaulniers for unreachable() that came a bit afterwards. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEPjU5OPd5QIZ9jqqOGXyLc2htIW0FAlvNpywACgkQGXyLc2ht IW1aiQ/+P8SJOa3GkiH37/nrIbk/wgMNytbs+gxE5YPaU1DP74Mn1prJ4XhQQic9 /mt8GnitZwzEHWdsGEUk+ZQwnIa7ZEAmpecbAF206AMRbNxa14T5YwBx4bqWFjZp sP4zPTHt3JCKL8TM+z26o152UbF2kc4WSxHjEjSFaqEnR2E5D0MwFeGPzc8fgWmS pNyn3CidzB0TS1UF008YXhiJO6HIhFNPyhPawlhwbbdsdlhZ4u0JmwfqP4EvjRFM kyzdQ9CDe+AgTTD9Y8HhtoUClaa7SJzFWNzpKIJMWt8jpKWYZQ/+WtwKg2cf+v3M uwktcs3RI1dYrjcITLz4VJ0oVaRFnyGgXvMP4yqWQx429hqnd09WXhMioXQ1htoI H0vpPIAPsK+dqVA9sP3JzMq4h6+dE7P364lkbThbVpYAGKZ52qaLt9ixT1mw1Q9f a683ji6o02IVOGUNZ/3KAb5MqdhewNEDdZILZYRfm4AL1Em3WW9QVtIosHPviLgc 16VjA02wKdxIcg+1LZMTNhfybztnSCf7SuQurpH1zEqFDGzrXwB7nYFplEY7DrrD cqhOA1fMQa++oQR+D40QDoY2ybqPOyvJG7z17pvtt+6jXep4yy2a3Bxf+ClK0nto 5yT7v9ikXJr84FOkk7OvktLlAWvcykvAdfvDepBZhpqhuX82tHY= =Y8WB -----END PGP SIGNATURE----- Merge tag 'compiler-attributes-for-linus-4.20-rc1' of https://github.com/ojeda/linux Pull compiler attribute updates from Miguel Ojeda: "This is an effort to disentangle the include/linux/compiler*.h headers and bring them up to date. The main idea behind the series is to use feature checking macros (i.e. __has_attribute) instead of compiler version checks (e.g. GCC_VERSION), which are compiler-agnostic (so they can be shared, reducing the size of compiler-specific headers) and version-agnostic. Other related improvements have been performed in the headers as well, which on top of the use of __has_attribute it has amounted to a significant simplification of these headers (e.g. GCC_VERSION is now only guarding a few non-attribute macros). This series should also help the efforts to support compiling the kernel with clang and icc. A fair amount of documentation and comments have also been added, clarified or removed; and the headers are now more readable, which should help kernel developers in general. The series was triggered due to the move to gcc >= 4.6. In turn, this series has also triggered Sparse to gain the ability to recognize __has_attribute on its own. Finally, the __nonstring variable attribute series has been also applied on top; plus two related patches from Nick Desaulniers for unreachable() that came a bit afterwards" * tag 'compiler-attributes-for-linus-4.20-rc1' of https://github.com/ojeda/linux: compiler-gcc: remove comment about gcc 4.5 from unreachable() compiler.h: update definition of unreachable() Compiler Attributes: ext4: remove local __nonstring definition Compiler Attributes: auxdisplay: panel: use __nonstring Compiler Attributes: enable -Wstringop-truncation on W=1 (gcc >= 8) Compiler Attributes: add support for __nonstring (gcc >= 8) Compiler Attributes: add MAINTAINERS entry Compiler Attributes: add Doc/process/programming-language.rst Compiler Attributes: remove uses of __attribute__ from compiler.h Compiler Attributes: KENTRY used twice the "used" attribute Compiler Attributes: use feature checks instead of version checks Compiler Attributes: add missing SPDX ID in compiler_types.h Compiler Attributes: remove unneeded sparse (__CHECKER__) tests Compiler Attributes: homogenize __must_be_array Compiler Attributes: remove unneeded tests Compiler Attributes: always use the extra-underscores syntax Compiler Attributes: remove unused attributes |
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| .. | ||
| basic | ||
| coccinelle | ||
| dtc | ||
| gcc-plugins | ||
| gdb | ||
| genksyms | ||
| kconfig | ||
| ksymoops | ||
| mod | ||
| package | ||
| selinux | ||
| tracing | ||
| .gitignore | ||
| adjust_autoksyms.sh | ||
| asn1_compiler.c | ||
| bin2c.c | ||
| bloat-o-meter | ||
| bootgraph.pl | ||
| bpf_helpers_doc.py | ||
| cc-can-link.sh | ||
| check_extable.sh | ||
| checkincludes.pl | ||
| checkkconfigsymbols.py | ||
| checkpatch.pl | ||
| checkstack.pl | ||
| checksyscalls.sh | ||
| checkversion.pl | ||
| clang-version.sh | ||
| cleanfile | ||
| cleanpatch | ||
| coccicheck | ||
| config | ||
| conmakehash.c | ||
| const_structs.checkpatch | ||
| decode_stacktrace.sh | ||
| decodecode | ||
| depmod.sh | ||
| diffconfig | ||
| documentation-file-ref-check | ||
| export_report.pl | ||
| extract-cert.c | ||
| extract-ikconfig | ||
| extract-module-sig.pl | ||
| extract-sys-certs.pl | ||
| extract-vmlinux | ||
| extract_xc3028.pl | ||
| faddr2line | ||
| file-size.sh | ||
| find-unused-docs.sh | ||
| gcc-goto.sh | ||
| gcc-ld | ||
| gcc-plugin.sh | ||
| gcc-version.sh | ||
| gcc-x86_32-has-stack-protector.sh | ||
| gcc-x86_64-has-stack-protector.sh | ||
| get_dvb_firmware | ||
| get_maintainer.pl | ||
| gfp-translate | ||
| headerdep.pl | ||
| headers.sh | ||
| headers_check.pl | ||
| headers_install.sh | ||
| insert-sys-cert.c | ||
| kallsyms.c | ||
| Kbuild.include | ||
| Kconfig.include | ||
| kernel-doc | ||
| ld-version.sh | ||
| leaking_addresses.pl | ||
| Lindent | ||
| link-vmlinux.sh | ||
| Makefile | ||
| Makefile.asm-generic | ||
| Makefile.build | ||
| Makefile.clean | ||
| Makefile.dtbinst | ||
| Makefile.extrawarn | ||
| Makefile.gcc-plugins | ||
| Makefile.headersinst | ||
| Makefile.host | ||
| Makefile.kasan | ||
| Makefile.kcov | ||
| Makefile.lib | ||
| Makefile.modbuiltin | ||
| Makefile.modinst | ||
| Makefile.modpost | ||
| Makefile.modsign | ||
| Makefile.ubsan | ||
| makelst | ||
| markup_oops.pl | ||
| mkcompile_h | ||
| mkmakefile | ||
| mksysmap | ||
| mkuboot.sh | ||
| module-common.lds | ||
| namespace.pl | ||
| objdiff | ||
| parse-maintainers.pl | ||
| patch-kernel | ||
| pnmtologo.c | ||
| profile2linkerlist.pl | ||
| prune-kernel | ||
| recordmcount.c | ||
| recordmcount.h | ||
| recordmcount.pl | ||
| setlocalversion | ||
| show_delta | ||
| sign-file.c | ||
| sortextable.c | ||
| sortextable.h | ||
| spdxcheck.py | ||
| spelling.txt | ||
| sphinx-pre-install | ||
| split-man.pl | ||
| stackdelta | ||
| stackusage | ||
| subarch.include | ||
| tags.sh | ||
| unifdef.c | ||
| ver_linux | ||
| xen-hypercalls.sh | ||
| xz_wrap.sh | ||