The string.h header file is needed for the memset() definition. The RT build fails because it is not pulled in via other header files.
Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de> --- drivers/mfd/atmel-smc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mfd/atmel-smc.c b/drivers/mfd/atmel-smc.c index 7d77948567d7..0adbd2e796fe 100644 --- a/drivers/mfd/atmel-smc.c +++ b/drivers/mfd/atmel-smc.c @@ -12,6 +12,7 @@ */ #include <linux/mfd/syscon/atmel-smc.h> +#include <linux/string.h> /** * atmel_smc_cs_conf_init - initialize a SMC CS conf -- 2.14.2