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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 | |
| parent | 51eb95e2da41802454f48b9afeb4d96a77295035 (diff) | |
| download | lwn-0ab1438bad43d95877f848b7df551bd431680270.tar.gz lwn-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>
| -rw-r--r-- | drivers/pinctrl/pinctrl-ingenic.c | 3 | ||||
| -rw-r--r-- | include/linux/kconfig.h | 6 | ||||
| -rw-r--r-- | include/linux/kernel.h | 2 |
3 files changed, 5 insertions, 6 deletions
diff --git a/drivers/pinctrl/pinctrl-ingenic.c b/drivers/pinctrl/pinctrl-ingenic.c index 651a36b9dcc0..983ba9865f77 100644 --- a/drivers/pinctrl/pinctrl-ingenic.c +++ b/drivers/pinctrl/pinctrl-ingenic.c @@ -11,6 +11,7 @@ #include <linux/gpio/driver.h> #include <linux/interrupt.h> #include <linux/io.h> +#include <linux/kernel.h> #include <linux/of_device.h> #include <linux/of_irq.h> #include <linux/of_platform.h> @@ -3854,6 +3855,8 @@ static int __init ingenic_pinctrl_probe(struct platform_device *pdev) return 0; } +#define IF_ENABLED(cfg, ptr) PTR_IF(IS_ENABLED(cfg), (ptr)) + static const struct of_device_id ingenic_pinctrl_of_match[] = { { .compatible = "ingenic,jz4730-pinctrl", diff --git a/include/linux/kconfig.h b/include/linux/kconfig.h index 24a59cb06963..cc8fa109cfa3 100644 --- a/include/linux/kconfig.h +++ b/include/linux/kconfig.h @@ -70,10 +70,4 @@ */ #define IS_ENABLED(option) __or(IS_BUILTIN(option), IS_MODULE(option)) -/* - * IF_ENABLED(CONFIG_FOO, ptr) evaluates to (ptr) if CONFIG_FOO is set to 'y' - * or 'm', NULL otherwise. - */ -#define IF_ENABLED(option, ptr) (IS_ENABLED(option) ? (ptr) : NULL) - #endif /* __LINUX_KCONFIG_H */ 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)); \ |