[PATCH] clk: samsung: add CONFIG_OF dependency

[PATCH] clk: samsung: add CONFIG_OF dependency

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

When CONFIG_OF is disabled, build testing on x86 runs into a couple of
objtool warnings from functions that unconditionally call panic() but
have no __noreturn annotation:

vmlinux.o: warning: objtool: exynos3250_cmu_isp_probe+0x17: samsung_cmu_register_one() is missing a __noreturn annotation
vmlinux.o: warning: objtool: exynos7885_cmu_probe+0x16: exynos_arm64_register_cmu() is missing a __noreturn annotation
vmlinux.o: warning: objtool: exynos850_cmu_probe+0x16: exynos_arm64_register_cmu() is missing a __noreturn annotation
vmlinux.o: warning: objtool: exynosautov9_cmu_probe+0x16: exynos_arm64_register_cmu() is missing a __noreturn annotation

The objtool analysis is correct, and this could be addressed by just
returning success whenever CONFIG_OF is disabled to let all that code
be eliminated, but since the driver is no use without CONFIG_OF,
just add that as a dependency. It will still get compile tested on
all architectures since CONFIG_OF is enabled in allmodconfig and most
randconfig builds.

Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/clk/samsung/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/samsung/Kconfig b/drivers/clk/samsung/Kconfig
index c07bb50513bfe..76a494e95027a 100644
--- a/drivers/clk/samsung/Kconfig
+++ b/drivers/clk/samsung/Kconfig
@@ -2,6 +2,7 @@
 # Recent Exynos platforms should just select COMMON_CLK_SAMSUNG:
 config COMMON_CLK_SAMSUNG
 	bool "Samsung Exynos clock controller support" if COMPILE_TEST
+	depends on OF
 	select S3C64XX_COMMON_CLK if ARM && ARCH_S3C64XX
 	select S5PV210_COMMON_CLK if ARM && ARCH_S5PV210
 	select EXYNOS_3250_COMMON_CLK if ARM && SOC_EXYNOS3250
-- 
2.39.2

Re: [PATCH] clk: samsung: add CONFIG_OF dependency

[Krzysztof Kozlowski]

On Fri, 09 Jun 2023 10:15:49 +0200, Arnd Bergmann wrote:
> When CONFIG_OF is disabled, build testing on x86 runs into a couple of
> objtool warnings from functions that unconditionally call panic() but
> have no __noreturn annotation:
> 
> vmlinux.o: warning: objtool: exynos3250_cmu_isp_probe+0x17: samsung_cmu_register_one() is missing a __noreturn annotation
> vmlinux.o: warning: objtool: exynos7885_cmu_probe+0x16: exynos_arm64_register_cmu() is missing a __noreturn annotation
> vmlinux.o: warning: objtool: exynos850_cmu_probe+0x16: exynos_arm64_register_cmu() is missing a __noreturn annotation
> vmlinux.o: warning: objtool: exynosautov9_cmu_probe+0x16: exynos_arm64_register_cmu() is missing a __noreturn annotation
> 
> [...]

Applied, thanks!

[1/1] clk: samsung: add CONFIG_OF dependency
      https://git.kernel.org/krzk/linux/c/2aac2d8b95923203e683c60124877ab434133679

Best regards,
-- 
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>