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| author |   Masahiro Yamada <masahiroy@kernel.org> | 2021-05-06 02:45:15 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2021-05-09 00:29:45 +0900 |
| commit | 0ab1438bad43d95877f848b7df551bd431680270 (patch) | |
| tree | c25724063ce7233107753ebc443447d143aadb1c /include/linux/kernel.h | |
| parent | kbuild: Don't remove link-vmlinux temporary files on exit/signal (diff) | |
| download | linux-dev-0ab1438bad43d95877f848b7df551bd431680270.tar.xz linux-dev-0ab1438bad43d95877f848b7df551bd431680270.zip | |
linux/kconfig.h: replace IF_ENABLED() with PTR_IF() in <linux/kernel.h>
<linux/kconfig.h> is included from all the kernel-space source files,
including C, assembly, linker scripts. It is intended to contain a
minimal set of macros to evaluate CONFIG options.
IF_ENABLED() is an intruder here because (x ? y : z) is C code, which
should not be included from assembly files or linker scripts.
Also, <linux/kconfig.h> is no longer self-contained because NULL is
defined in <linux/stddef.h>.
Move IF_ENABLED() out to <linux/kernel.h> as PTR_IF(). PTF_IF()
takes the general boolean expression instead of a CONFIG option
so that it fits better in <linux/kernel.h>.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'include/linux/kernel.h')
| -rw-r--r-- | include/linux/kernel.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 5b7ed6dc99ac..2f9d15410c93 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -48,6 +48,8 @@ */ #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr)) +#define PTR_IF(cond, ptr) ((cond) ? (ptr) : NULL) + #define u64_to_user_ptr(x) ( \ { \ typecheck(u64, (x)); \ |