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authorMasahiro Yamada <masahiroy@kernel.org>2021-05-05 20:45:15 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2021-05-08 18:29:45 +0300
commit0ab1438bad43d95877f848b7df551bd431680270 (patch)
treec25724063ce7233107753ebc443447d143aadb1c /include/linux/kernel.h
parent51eb95e2da41802454f48b9afeb4d96a77295035 (diff)
downloadlinux-0ab1438bad43d95877f848b7df551bd431680270.tar.xz
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.h2
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)); \