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* kallsyms: fix nonconverging kallsyms table with lldArnd Bergmann2021-02-051-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | ARM randconfig builds with lld sometimes show a build failure from kallsyms: Inconsistent kallsyms data Try make KALLSYMS_EXTRA_PASS=1 as a workaround The problem is the veneers/thunks getting added by the linker extend the symbol table, which in turn leads to more veneers being needed, so it may take a few extra iterations to converge. This bug has been fixed multiple times before, but comes back every time a new symbol name is used. lld uses a different set of identifiers from ld.bfd, so the additional ones need to be added as well. I looked through the sources and found that arm64 and mips define similar prefixes, so I'm adding those as well, aside from the ones I observed. I'm not sure about powerpc64, which seems to already be handled through a section match, but if it comes back, the "__long_branch_" and "__plt_" prefixes would have to get added as well. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* scripts/clang-tools: switch explicitly to Python 3Masahiro Yamada2021-02-032-2/+2
| | | | | | | | | For the same reason as commit 51839e29cb59 ("scripts: switch explicitly to Python 3"), switch some more scripts, which I tested and confirmed working on Python 3. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Nathan Chancellor <nathan@kernel.org>
* kbuild: remove PYTHON variableMasahiro Yamada2021-02-011-1/+1
| | | | | | | | | | | | | | | | | Python retired in 2020, and some distributions do not provide the 'python' command any more. As in commit 51839e29cb59 ("scripts: switch explicitly to Python 3"), we need to use more specific 'python3' to invoke scripts even if they are written in a way compatible with both Python 2 and 3. This commit removes the variable 'PYTHON', and switches the existing users to 'PYTHON3'. BTW, PEP 394 (https://www.python.org/dev/peps/pep-0394/) is a helpful material. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* Revert "checkpatch: add check for keyword 'boolean' in Kconfig definitions"Masahiro Yamada2021-01-281-7/+0
| | | | | | | | | | | | This reverts commit 327953e9af6c59ad111b28359e59e3ec0cbd71b6. You cannot use 'boolean' since commit b92d804a5179 ("kconfig: drop 'boolean' keyword"). This check is no longer needed. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Joe Perches <joe@perches.com>
* scripts: use pkg-config to locate libcryptoRolf Eike Beer2021-01-281-2/+6
| | | | | | | | | Otherwise build fails if the headers are not in the default location. While at it also ask pkg-config for the libs, with fallback to the existing value. Signed-off-by: Rolf Eike Beer <eb@emlix.com> Cc: stable@vger.kernel.org # 5.6.x Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* kconfig: mconf: fix HOSTCC callEnrico Weigelt, metux IT consult2021-01-271-1/+1
| | | | | | | | | | | Commit c0f975af1745 ("kconfig: Support building mconf with vendor sysroot ncurses") introduces a bug when HOSTCC contains parameters: the whole command line is treated as the program name (with spaces in it). Therefore, we have to remove the quotes. Fixes: c0f975af1745 ("kconfig: Support building mconf with vendor sysroot ncurses") Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* kbuild: simplify GCC_PLUGINS enablement in dummy-tools/gccMasahiro Yamada2021-01-231-7/+3
| | | | | | | | With commit 1e860048c53e ("gcc-plugins: simplify GCC plugin-dev capability test") applied, this hunk can be way simplified because now scripts/gcc-plugins/Kconfig only checks plugin-version.h Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* scripts: switch explicitly to Python 3Andy Shevchenko2021-01-222-2/+2
| | | | | | | | | Some distributions are about to switch to Python 3 support only. This means that /usr/bin/python, which is Python 2, is not available anymore. Hence, switch scripts to use Python 3 explicitly. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* Merge tag 'kbuild-fixes-v5.11' of ↵Linus Torvalds2021-01-103-11/+4
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: - Search for <ncurses.h> in the default header path of HOSTCC - Tweak the option order to be kind to old BSD awk - Remove 'kvmconfig' and 'xenconfig' shorthands - Fix documentation * tag 'kbuild-fixes-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: Documentation: kbuild: Fix section reference kconfig: remove 'kvmconfig' and 'xenconfig' shorthands lib/raid6: Let $(UNROLL) rules work with macOS userland kconfig: Support building mconf with vendor sysroot ncurses kconfig: config script: add a little user help MAINTAINERS: adjust GCC PLUGINS after gcc-plugin.sh removal
| * kconfig: remove 'kvmconfig' and 'xenconfig' shorthandsMasahiro Yamada2021-01-041-10/+0
| | | | | | | | | | | | | | Linux 5.10 is out. Remove the 'kvmconfig' and 'xenconfig' shorthands as previously announced. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * kconfig: Support building mconf with vendor sysroot ncursesJohn Millikin2021-01-041-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changes the final fallback path in the ncurses locator for mconf to support host compilers with a non-default sysroot. This is similar to the hardcoded search for ncurses under '/usr/include', but can support compilers that keep their default header and library directories elsewhere. For nconfig, do nothing because the only vendor compiler I'm aware of with this layout (Apple Clang) ships an ncurses version that's too old for nconfig anyway. Signed-off-by: John Millikin <john@john-millikin.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * kconfig: config script: add a little user helpRandy Dunlap2021-01-041-0/+1
| | | | | | | | | | | | | | | | | | | | | | Give the user a clue about the problem along with the 35 lines of usage/help text. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: linux-kbuild@vger.kernel.org Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* | gcc-plugins: fix gcc 11 indigestion with plugins...Valdis Klētnieks2021-01-061-2/+2
|/ | | | | | | | | | | | | | | | | | | | | | | Fedora Rawhide has started including gcc 11,and the g++ compiler throws a wobbly when it hits scripts/gcc-plugins: HOSTCXX scripts/gcc-plugins/latent_entropy_plugin.so In file included from /usr/include/c++/11/type_traits:35, from /usr/lib/gcc/x86_64-redhat-linux/11/plugin/include/system.h:244, from /usr/lib/gcc/x86_64-redhat-linux/11/plugin/include/gcc-plugin.h:28, from scripts/gcc-plugins/gcc-common.h:7, from scripts/gcc-plugins/latent_entropy_plugin.c:78: /usr/include/c++/11/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options. 32 | #error This file requires compiler and library support \ In fact, it works just fine with c++11, which has been in gcc since 4.8, and we now require 4.9 as a minimum. Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/82487.1609006918@turing-police
* depmod: handle the case of /sbin/depmod without /sbin in PATHLinus Torvalds2021-01-011-0/+2
| | | | | | | | | | | | | Commit 436e980e2ed5 ("kbuild: don't hardcode depmod path") stopped hard-coding the path of depmod, but in the process caused trouble for distributions that had that /sbin location, but didn't have it in the PATH (generally because /sbin is limited to the super-user path). Work around it for now by just adding /sbin to the end of PATH in the depmod.sh script. Reported-and-tested-by: Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* checkpatch: prefer strscpy to strlcpyJoe Perches2020-12-291-0/+6
| | | | | | | | | | Prefer strscpy over the deprecated strlcpy function. Link: https://lkml.kernel.org/r/19fe91084890e2c16fe56f960de6c570a93fa99b.camel@perches.com Signed-off-by: Joe Perches <joe@perches.com> Requested-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-5.11' of ↵Linus Torvalds2020-12-254-304/+18
|\ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux Pull coccinelle updates from Julia Lawall. * 'for-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux: scripts: coccicheck: Correct usage of make coccicheck coccinelle: update expiring email addresses coccinnelle: Remove ptr_ret script kbuild: do not use scripts/ld-version.sh for checking spatch version remove boolinit.cocci
| * scripts: coccicheck: Correct usage of make coccicheckSumera Priyadarsini2020-12-241-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The command "make coccicheck C=1 CHECK=scripts/coccicheck" results in the error: ./scripts/coccicheck: line 65: -1: shift count out of range This happens because every time the C variable is specified, the shell arguments need to be "shifted" in order to take only the last argument, which is the C file to test. These shell arguments mostly comprise flags that have been set in the Makefile. However, when coccicheck is specified in the make command as a rule, the number of shell arguments is zero, thus passing the invalid value -1 to the shift command, resulting in an error. Modify coccicheck to print correct usage of make coccicheck so as to avoid the error. Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
| * coccinnelle: Remove ptr_ret scriptMaxime Ripard2020-12-151-97/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ptr_ret script script addresses a number of situations where we end up testing an error pointer, and if it's an error returning it, or return 0 otherwise to transform it into a PTR_ERR_OR_ZERO call. So it will convert a block like this: if (IS_ERR(err)) return PTR_ERR(err); return 0; into return PTR_ERR_OR_ZERO(err); While this is technically correct, it has a number of drawbacks. First, it merges the error and success path, which will make it harder for a reviewer or reader to grasp. It's also more difficult to extend if we were to add some code between the error check and the function return, making the author essentially revert that patch before adding new lines, while it would have been a trivial addition otherwise for the rewiever. Therefore, since that script is only about cosmetic in the first place, let's remove it since it's not worth it. Acked-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Thierry Reding <treding@nvidia.com> Acked-by: Julia Lawall <julia.lawall@inria.fr> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Signed-off-by: Julia Lawall <julia.lawall@inria.fr>
| * kbuild: do not use scripts/ld-version.sh for checking spatch versionMasahiro Yamada2020-12-122-12/+6
| | | | | | | | | | | | | | | | | | | | | | scripts/ld-version.sh was, as its file name implies, originally intended for the GNU ld version, but is (ab)used for the spatch version too. Use 'sort -CV' for the version comparison, then coccicheck does not need to use scripts/ld-version.sh. Fix nsdeps as well. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
| * remove boolinit.cocciPeter Zijlstra2020-11-091-195/+0
| | | | | | | | | | | | | | 0/1 for booleans is perfectly valid C. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
* | Merge tag 'kconfig-v5.11' of ↵Linus Torvalds2020-12-228-76/+94
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kconfig updates from Masahiro Yamada: - Support only Qt5 for qconf - Validate signal/slot connection at compile time of qconf - Sanitize header includes * tag 'kconfig-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kconfig: doc: fix $(fileno) to $(filename) kconfig: fix return value of do_error_if() kconfig: clean up header inclusion kconfig: qconf: show Qt version in the About dialog kconfig: make lkc.h self-sufficient #include-wise kconfig: qconf: convert to Qt5 new signal/slot connection syntax kconfig: qconf: use a variable to pass packages to pkg-config kconfig: qconf: drop Qt4 support
| * | kconfig: fix return value of do_error_if()Masahiro Yamada2020-12-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | $(error-if,...) is expanded to an empty string. Currently, it relies on eval_clause() returning xstrdup("") when all attempts for expansion fail, but the correct implementation is to make do_error_if() return xstrdup(""). Fixes: 1d6272e6fe43 ("kconfig: add 'info', 'warning-if', and 'error-if' built-in functions") Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * | kconfig: clean up header inclusionBoris Kolpackov2020-12-084-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | - Add missing includes. - Remove no longer necessary includes. Signed-off-by: Boris Kolpackov <boris@codesynthesis.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * | kconfig: qconf: show Qt version in the About dialogMasahiro Yamada2020-12-081-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | You can get the Qt version by running "pkg-config --modversion Qt5Core" or something, but this might be useful to get the runtime Qt version more easily. Go to the menu "Help" -> "About", then you can see it. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * | kconfig: make lkc.h self-sufficient #include-wiseBoris Kolpackov2020-12-081-0/+4
| | | | | | | | | | | | | | | Signed-off-by: Boris Kolpackov <boris@codesynthesis.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * | kconfig: qconf: convert to Qt5 new signal/slot connection syntaxMasahiro Yamada2020-12-081-58/+78
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that the Qt4 support was dropped, we can use the new connection syntax supported by Qt5. It provides compile-time checking of the validity of the connection. Previously, the connection between signals and slots were checked only run-time. Commit d85de3399f97 ("kconfig: qconf: fix signal connection to invalid slots") fixed wrong slots. This change makes it possible to catch such mistakes easily. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Boris Kolpackov <boris@codesynthesis.com>
| * | kconfig: qconf: use a variable to pass packages to pkg-configMasahiro Yamada2020-12-081-1/+1
| | | | | | | | | | | | | | | | | | The variable, PKG, is defined at the beginning of this script. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * | kconfig: qconf: drop Qt4 supportMasahiro Yamada2020-12-081-10/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is possible to keep this compatible with both Qt4 and Qt5, but it is questionable if it is worth the efforts; it would require us to test this on both of them, and prevent us from using new features in Qt5. Qt5 was released in 2012, and now widely available. Drop the Qt4 support. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* | | Merge tag 'kbuild-v5.11' of ↵Linus Torvalds2020-12-2214-55/+87
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - Use /usr/bin/env for shebang lines in scripts - Remove useless -Wnested-externs warning flag - Update documents - Refactor log handling in modpost - Stop building modules without MODULE_LICENSE() tag - Make the insane combination of 'static' and EXPORT_SYMBOL an error - Improve genksyms to handle _Static_assert() * tag 'kbuild-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: Documentation/kbuild: Document platform dependency practises Documentation/kbuild: Document COMPILE_TEST dependencies genksyms: Ignore module scoped _Static_assert() modpost: turn static exports into error modpost: turn section mismatches to error from fatal() modpost: change license incompatibility to error() from fatal() modpost: turn missing MODULE_LICENSE() into error modpost: refactor error handling and clarify error/fatal difference modpost: rename merror() to error() kbuild: don't hardcode depmod path kbuild: doc: document subdir-y syntax kbuild: doc: clarify the difference between extra-y and always-y kbuild: doc: split if_changed explanation to a separate section kbuild: doc: merge 'Special Rules' and 'Custom kbuild commands' sections kbuild: doc: fix 'List directories to visit when descending' section kbuild: doc: replace arch/$(ARCH)/ with arch/$(SRCARCH)/ kbuild: doc: update the description about kbuild Makefiles Makefile.extrawarn: remove -Wnested-externs warning tweewide: Fix most Shebang lines
| * | | genksyms: Ignore module scoped _Static_assert()Marco Elver2020-12-213-1/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The C11 _Static_assert() keyword may be used at module scope, and we need to teach genksyms about it to not abort with an error. We currently have a growing number of static_assert() (but also direct usage of _Static_assert()) users at module scope: git grep -E '^_Static_assert\(|^static_assert\(' | grep -v '^tools' | wc -l 135 More recently, when enabling CONFIG_MODVERSIONS with CONFIG_KCSAN, we observe a number of warnings: WARNING: modpost: EXPORT symbol "<..all kcsan symbols..>" [vmlinux] [...] When running a preprocessed source through 'genksyms -w' a number of syntax errors point at usage of static_assert()s. In the case of kernel/kcsan/encoding.h, new static_assert()s had been introduced which used expressions that appear to cause genksyms to not even be able to recover from the syntax error gracefully (as it appears was the case previously). Therefore, make genksyms ignore all _Static_assert() and the contained expression. With the fix, usage of _Static_assert() no longer cause "syntax error" all over the kernel, and the above modpost warnings for KCSAN are gone, too. Signed-off-by: Marco Elver <elver@google.com> Acked-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * | | modpost: turn static exports into errorQuentin Perret2020-12-211-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using EXPORT_SYMBOL*() on static functions is fundamentally wrong. Modpost currently reports that as a warning, but clearly this is not a pattern we should allow, and all in-tree occurences should have been fixed by now. So, promote the warn() message to error() to make sure this never happens again. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Matthias Maennich <maennich@google.com> Signed-off-by: Quentin Perret <qperret@google.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * | | modpost: turn section mismatches to error from fatal()Masahiro Yamada2020-12-211-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is code that reports static EXPORT_SYMBOL a few lines below. It is not a good idea to bail out here. I renamed sec_mismatch_fatal to sec_mismatch_warn_only (with logical inversion) to match to CONFIG_SECTION_MISMATCH_WARN_ONLY. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * | | modpost: change license incompatibility to error() from fatal()Masahiro Yamada2020-12-211-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change fatal() to error() to continue running to report more possible issues. There is no difference in the fact that modpost will fail anyway. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * | | modpost: turn missing MODULE_LICENSE() into errorMasahiro Yamada2020-12-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Do not create modules with no license tag. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * | | modpost: refactor error handling and clarify error/fatal differenceMasahiro Yamada2020-12-212-29/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We have 3 log functions. fatal() is special because it lets modpost bail out immediately. The difference between warn() and error() is the only prefix parts ("WARNING:" vs "ERROR:"). In my understanding, the expected handling of error() is to propagate the return code of the function to the exit code of modpost, as check_exports() etc. already does. This is a good manner in general because we should display as many error messages as possible in a single run of modpost. What is annoying about fatal() is that it kills modpost at the first error. People would need to run Kbuild again and again until they fix all errors. But, unfortunately, people tend to do: "This case should not be allowed. Let's replace warn() with fatal()." One of the reasons is probably it is tedious to manually hoist the error code to the main() function. This commit refactors error() so any single call for it automatically makes modpost return the error code. I also added comments in modpost.h for warn(), error(), and fatal(). Please use fatal() only when you have a strong reason to do so. For example: - Memory shortage (i.e. malloc() etc. has failed) - The ELF file is broken, and there is no point to continue parsing - Something really odd has happened For general coding errors, please use error(). Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Quentin Perret <qperret@google.com>
| * | | modpost: rename merror() to error()Masahiro Yamada2020-12-212-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The log function names, warn(), merror(), fatal() are inconsistent. Commit 2a11665945d5 ("kbuild: distinguish between errors and warnings in modpost") intentionally chose merror() to avoid the conflict with the library function error(). See man page of error(3). But, we are already causing the conflict with warn() because it is also a library function. See man page of warn(3). err() would be a problem for the same reason. The common technique to work around name conflicts is to use macros. For example: /* in a header */ #define error(fmt, ...) __error(fmt, ##__VA_ARGS__) #define warn(fmt, ...) __warn(fmt, ##__VA_ARGS__) /* function definition */ void __error(const char *fmt, ...) { <our implementation> } void __warn(const char *fmt, ...) { <our implementation> } In this way, we can implement our own warn() and error(), still we can include <error.h> and <err.h> with no problem. And, commit 93c95e526a4e ("modpost: rework and consolidate logging interface") already did that. Since the log functions are all macros, we can use error() without causing "conflicting types" errors. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * | | Makefile.extrawarn: remove -Wnested-externs warningArnd Bergmann2020-12-081-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The -Wnested-externs warning has become useless with gcc, since this warns every time that BUILD_BUG_ON() or similar macros are used. With clang, the warning option does nothing to start with, so just remove it entirely. Suggested-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
| * | | tweewide: Fix most Shebang linesFinn Behrens2020-12-088-8/+8
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | Change every shebang which does not need an argument to use /usr/bin/env. This is needed as not every distro has everything under /usr/bin, sometimes not even bash. Signed-off-by: Finn Behrens <me@kloenk.de> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* | | kasan, arm64: expand CONFIG_KASAN checksAndrey Konovalov2020-12-221-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some #ifdef CONFIG_KASAN checks are only relevant for software KASAN modes (either related to shadow memory or compiler instrumentation). Expand those into CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS. Link: https://lkml.kernel.org/r/e6971e432dbd72bb897ff14134ebb7e169bdcf0c.1606161801.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Alexander Potapenko <glider@google.com> Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Branislav Rankov <Branislav.Rankov@arm.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Evgenii Stepanov <eugenis@google.com> Cc: Kevin Brodsky <kevin.brodsky@arm.com> Cc: Marco Elver <elver@google.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge tag 'gcc-plugins-v5.11-rc1' of ↵Linus Torvalds2020-12-1612-525/+2
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull gcc-plugins updates from Kees Cook: - Clean up gcc plugin builds now that GCC must be 4.9+ (Masahiro Yamada) - Update MAINTAINERS (Kees Cook) * tag 'gcc-plugins-v5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: MAINTAINERS: Drop inactive gcc-plugins maintainer gcc-plugins: simplify GCC plugin-dev capability test gcc-plugins: remove code for GCC versions older than 4.9
| * | | gcc-plugins: simplify GCC plugin-dev capability testMasahiro Yamada2020-12-042-20/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Linus pointed out a third of the time in the Kconfig parse stage comes from the single invocation of cc1plus in scripts/gcc-plugin.sh [1], and directly testing plugin-version.h for existence cuts down the overhead a lot. [2] This commit takes one step further to kill the build test entirely. The small piece of code was probably intended to test the C++ designated initializer, which was not supported until C++20. In fact, with -pedantic option given, both GCC and Clang emit a warning. $ echo 'class test { public: int test; } test = { .test = 1 };' | g++ -x c++ -pedantic - -fsyntax-only <stdin>:1:43: warning: C++ designated initializers only available with '-std=c++2a' or '-std=gnu++2a' [-Wpedantic] $ echo 'class test { public: int test; } test = { .test = 1 };' | clang++ -x c++ -pedantic - -fsyntax-only <stdin>:1:43: warning: designated initializers are a C++20 extension [-Wc++20-designator] class test { public: int test; } test = { .test = 1 }; ^ 1 warning generated. Otherwise, modern C++ compilers should be able to build the code, and hopefully skipping this test should not make any practical problem. Checking the existence of plugin-version.h is still needed to ensure the plugin-dev package is installed. The test code is now small enough to be embedded in scripts/gcc-plugins/Kconfig. [1] https://lore.kernel.org/lkml/CAHk-=wjU4DCuwQ4pXshRbwDCUQB31ScaeuDo1tjoZ0_PjhLHzQ@mail.gmail.com/ [2] https://lore.kernel.org/lkml/CAHk-=whK0aQxs6Q5ijJmYF1n2ch8cVFSUzU5yUM_HOjig=+vnw@mail.gmail.com/ Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20201203125700.161354-1-masahiroy@kernel.org
| * | | gcc-plugins: remove code for GCC versions older than 4.9Masahiro Yamada2020-12-0410-505/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Documentation/process/changes.rst says the minimal GCC version is 4.9. Hence, BUILDING_GCC_VERSION is greater than or equal to 4009. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20201202134929.99883-1-masahiroy@kernel.org
* | | | ubsan: move cc-option tests into KconfigKees Cook2020-12-151-30/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of doing if/endif blocks with cc-option calls in the UBSAN Makefile, move all the tests into Kconfig and use the Makefile to collect the results. Link: https://lkml.kernel.org/r/20201203004437.389959-3-keescook@chromium.org Link: https://lore.kernel.org/lkml/CAHk-=wjPasyJrDuwDnpHJS2TuQfExwe=px-SzLeN8GFMAQJPmQ@mail.gmail.com/ Signed-off-by: Kees Cook <keescook@chromium.org> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: George Popescu <georgepope@android.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Marco Elver <elver@google.com> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | ubsan: remove redundant -Wno-maybe-uninitializedKees Cook2020-12-151-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch series "Clean up UBSAN Makefile", v2. This series attempts to address the issues seen with UBSAN's object-size sanitizer causing problems under GCC. In the process, the Kconfig and Makefile are refactored to do all the cc-option calls in the Kconfig. Additionally start to detangle -Wno-maybe-uninitialized, disable UBSAN_TRAP under COMPILE_TEST for wider build coverage, and expand the libusan tests. This patch (of 7): In commit 78a5255ffb6a ("Stop the ad-hoc games with -Wno-maybe-initialized") -Wmaybe-uninitialized was disabled globally, so keeping the disabling logic here too doesn't make sense. Link: https://lkml.kernel.org/r/20201203004437.389959-1-keescook@chromium.org Link: https://lkml.kernel.org/r/20201203004437.389959-2-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Nathan Chancellor <natechancellor@gmail.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Marco Elver <elver@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: George Popescu <georgepope@android.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | checkpatch: add printk_once and printk_ratelimit to prefer pr_<level> warningJoe Perches2020-12-151-3/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the _once and _ratelimited variants to the test for printk(KERN_<LEVEL> that should prefer pr_<level>. Miscellanea: o Add comment description for the conversions [joe@perches.com: fixlet] Link: https://lkml.kernel.org/r/32260871d4718ba7f48a8e9e07452bb76de300db.camel@perches.comLink: https://lkml.kernel.org/r/993b72b2ef91a57c5e725b52971ce3fd31375061.camel@perches.com Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | checkpatch: fix TYPO_SPELLING check for words with apostropheDwaipayan Ray2020-12-151-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | checkpatch reports a false TYPO_SPELLING warning for some words containing an apostrophe when run with --codespell option. A false positive is "doesn't". Occurrence of the word causes checkpatch to emit the following warning: "WARNING: 'doesn'' may be misspelled - perhaps 'doesn't'?" Modify the regex pattern to be more in line with the codespell default word matching regex. This fixes the word capture and avoids the false warning. In addition, highlight the misspelled word location by adding a caret below the word. [akpm@linux-foundation.org: make matched misspelling more obvious, per Joe] Link: https://lkml.kernel.org/r/09c24ef1aa2f1c4fe909d76f5426f08780b9d81c.camel@perches.com Link: https://lkml.kernel.org/r/20201201190729.169733-1-dwaipayanray1@gmail.com Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com> Suggested-by: Joe Perches <joe@perches.com> Reported-by: Peilin Ye <yepeilin.cs@gmail.com> Acked-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | checkpatch: add warning for lines starting with a '#' in commit logDwaipayan Ray2020-12-151-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit log lines starting with '#' are dropped by git as comments. Add a check to emit a warning for these lines. Also add a --fix option to insert a space before the leading '#' in such lines. Link: https://lkml.kernel.org/r/20201202205740.127986-1-dwaipayanray1@gmail.com Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com> Suggested-by: Joe Perches <joe@perches.com> Suggested-by: Peilin Ye <yepeilin.cs@gmail.com> Tested-by: Peilin Ye <yepeilin.cs@gmail.com> Acked-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | checkpatch: add warning for unnecessary use of %h[xudi] and %hh[xudi]Dwaipayan Ray2020-12-151-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Modifiers %h and %hh should never be used. Commit cbacb5ab0aa0 ("docs: printk-formats: Stop encouraging use of unnecessary %h[xudi] and %hh[xudi]") specifies that: "Standard integer promotion is already done and %hx and %hhx is useless so do not encourage the use of %hh[xudi] or %h[xudi]." "The "h" and "hh" things should never be used. The only reason for them being used if you have an "int", but you want to print it out as a "char" (and honestly, that is a really bad reason, you'd be better off just using a proper cast to make the code more obvious)." Add a new check to emit a warning on finding an unneeded use of %h or %hh modifier. Also add a fix option to the check. Link: https://lore.kernel.org/lkml/4910042649a4f3ab22fac93191b8c1fa0a2e17c3.camel@perches.com/ Link: https://lkml.kernel.org/r/20201128200046.78739-1-dwaipayanray1@gmail.com Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com> Suggested-by: Joe Perches <joe@perches.com> Suggested-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Acked-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | checkpatch: add fix and improve warning msg for non-standard signatureAditya Srivastava2020-12-151-2/+69
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently checkpatch warns for BAD_SIGN_OFF on non-standard signature styles. A large number of these warnings occur because of typo mistakes in signature tags. An evaluation over v4.13..v5.8 showed that out of 539 warnings due to non-standard signatures, 87 are due to typo mistakes. Following are the standard signature tags which are often incorrectly used, along with their individual counts of incorrect use (over v4.13..v5.8): Reviewed-by: 42 Signed-off-by: 25 Reported-by: 6 Acked-by: 4 Tested-by: 4 Suggested-by: 4 Provide a fix by calculating levenshtein distance for the signature tag with all the standard signatures and suggest a fix with a signature, whose edit distance is less than or equal to 2 with the misspelled signature. Out of the 86 mispelled signatures fixed with this approach, 85 were found to be good corrections and 1 was bad correction. Following was found to be a bad correction: Tweeted-by (count: 1) => Tested-by Link: https://lkml.kernel.org/r/20201128204333.7054-1-yashsri421@gmail.com Signed-off-by: Aditya Srivastava <yashsri421@gmail.com> Acked-by: Joe Perches <joe@perches.com> Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | checkpatch: add fix option for LOGICAL_CONTINUATIONSAditya Srivastava2020-12-151-2/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, checkpatch warns if logical continuations are placed at the start of a line and not at the end of previous line. E.g., running checkpatch on commit 3485507fc272 ("staging: bcm2835-camera: Reduce length of enum names") reports: CHECK:LOGICAL_CONTINUATIONS: Logical continuations should be on the previous line + if (!ret + && camera_port == Provide a simple fix by inserting logical operator at the last non-comment, non-whitespace char of the previous line and removing from current line, if both the lines are additions(ie start with '+') Link: https://lkml.kernel.org/r/20201123102818.24364-1-yashsri421@gmail.com Signed-off-by: Aditya Srivastava <yashsri421@gmail.com> Acked-by: Joe Perches <joe@perches.com> Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 15:52:35 +0000