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kbuild: prevent exported headers from including <stdlib.h>, <stdbool.h> Some UAPI headers included <stdlib.h>, like this: #ifndef __KERNEL__ #include <stdlib.h> #endif As it turned out, they just included it for no good reason. After some fixes, now I can compile-test UAPI headers (CONFIG_UAPI_HEADER_TEST=y) without including <stdlib.h> from the system header search paths. To avoid somebody getting it back again, this commit adds the dummy header, usr/dummy-include/stdlib.h I added $(srctree)/usr/dummy-include to the header search paths. Because it is searched before the system directories, if someone tries to include <stdlib.h>, they will see the error message. While I am here, I also replaced $(objtree)/usr/include with $(obj), but it has no functional change. If we can make kernel headers self-contained (that is, none of exported kernel headers includes system headers), we will be able to add the -nostdinc flag, but that is much far from where we stand now. As a realistic solution, we can ban header inclusion individually by putting a dummy header into usr/dummy-include/. Currently, no header include <stdbool.h>. I put it as well before somebody attempts to use it. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 4 年前 | |
kbuild: uapi: Strip comments before size type check [ Upstream commit 66128f4287b04aef4d4db9bf5035985ab51487d5 ] On m68k, check_sizetypes in headers_check reports: ./usr/include/asm/bootinfo-amiga.h:17: found __[us]{8,16,32,64} type without #include <linux/types.h> This header file does not use any of the Linux-specific integer types, but merely refers to them from comments, so this is a false positive. As of commit c3a9d74ee413bdb3 ("kbuild: uapi: upgrade check_sizetypes() warning to error"), this check was promoted to an error, breaking m68k all{mod,yes}config builds. Fix this by stripping simple comments before looking for Linux-specific integer types. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Link: https://patch.msgid.link/949f096337e28d50510e970ae3ba3ec9c1342ec0.1759753998.git.geert@linux-m68k.org [nathan: Adjust comment and remove unnecessary escaping from slashes in regex] Signed-off-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> (cherry picked from commit 32df8c333071f34e056c553d2e718a9300ff23ae) Signed-off-by: Wentao Guan <guanwentao@uniontech.com> | 7 个月前 | |
.gitignore: prefix local generated files with a slash The pattern prefixed with '/' matches files in the same directory, but not ones in sub-directories. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Miguel Ojeda <ojeda@kernel.org> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Andra Paraschiv <andraprs@amazon.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Gabriel Krisman Bertazi <krisman@collabora.com> | 5 年前 | |
initramfs: Remove redundant dependency of RD_ZSTD on BLK_DEV_INITRD Commit be1859bdc660 ("initramfs: remove redundant dependency on BLK_DEV_INITRD") removed all redundant dependencies on BLK_DEV_INITRD, but the recent addition of zstd support introduced a new one. Fixes: a30d8a39f057 ("usr: Add support for zstd compressed initramfs") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> | 5 年前 | |
initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP gen_initramfs.sh has an internal dependency on KBUILD_BUILD_TIMESTAMP for generating file mtimes that is not exposed to make, so changing KBUILD_BUILD_TIMESTAMP will not trigger a rebuild of the archive. Declare the mtime date as a new parameter to gen_initramfs.sh to encode KBUILD_BUILD_TIMESTAMP in the shell command, thereby making make aware of the dependency. It will rebuild if KBUILD_BUILD_TIMESTAMP changes or is newly set/unset. It will _not_ rebuild if KBUILD_BUILD_TIMESTAMP is unset before and after. This should be fine for anyone who doesn't care about setting specific build times in the first place. Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com> Tested-by: Andrew Donnellan <ajd@linux.ibm.com> Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Reviewed-by: Nicolas Schier <n.schier@avm.de> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> | 3 年前 | |
initramfs: add default_cpio_list, and delete -d option support When CONFIG_INITRAMFS_SOURCE is empty, the Makefile passes the -d option to gen_initramfs.sh to create the default initramfs, which contains /dev, /dev/console, and /root. This commit simplifies the default behavior; remove the -d option, and add the default cpio list. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> | 6 年前 | |
initramfs: Check negative timestamp to prevent broken cpio archive Similar to commit 4c9d410f32b3 ("initramfs: Check timestamp to prevent broken cpio archive"), except asserts that the timestamp is non-negative. This can happen when the KBUILD_BUILD_TIMESTAMP is a value before UNIX epoch, which may be set when making reproducible builds that don't want to look like they use a valid date. While support for dates before 1970 might not be supported, this is more about preventing undetected CPIO corruption. The printf's use a minimum length format specifier, and will happily make the field longer than 8 characters if they need to. Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com> Tested-by: Andrew Donnellan <ajd@linux.ibm.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> | 3 年前 | |
initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP gen_initramfs.sh has an internal dependency on KBUILD_BUILD_TIMESTAMP for generating file mtimes that is not exposed to make, so changing KBUILD_BUILD_TIMESTAMP will not trigger a rebuild of the archive. Declare the mtime date as a new parameter to gen_initramfs.sh to encode KBUILD_BUILD_TIMESTAMP in the shell command, thereby making make aware of the dependency. It will rebuild if KBUILD_BUILD_TIMESTAMP changes or is newly set/unset. It will _not_ rebuild if KBUILD_BUILD_TIMESTAMP is unset before and after. This should be fine for anyone who doesn't care about setting specific build times in the first place. Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com> Tested-by: Andrew Donnellan <ajd@linux.ibm.com> Signed-off-by: Benjamin Gray <bgray@linux.ibm.com> Reviewed-by: Nicolas Schier <n.schier@avm.de> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> | 3 年前 | |
initramfs: refactor the initramfs build rules Currently, usr/gen_initramfs.sh takes care of all the use-cases: [1] generates a cpio file unless CONFIG_INITRAMFS_SOURCE points to a single cpio archive [2] If CONFIG_INITRAMFS_SOURCE is the path to a cpio archive, use it as-is. [3] Compress the cpio file according to CONFIG_INITRAMFS_COMPRESSION_* unless it is passed a compressed archive. To simplify the script, move [2] and [3] to usr/Makefile. If CONFIG_INITRAMFS_SOURCE is the path to a cpio archive, there is no need to run this shell script. For the cpio archive compression, you can re-use the rules from scripts/Makefile.lib . Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> | 6 年前 |
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