Hello, On 18/10/2018 14:42:07-0700, Nathan Chancellor wrote: > Clang warns: > > drivers/rtc/rtc-s35390a.c:124:27: warning: implicit conversion from > 'int' to 'char' changes value from 192 to -64 [-Wconstant-conversion] > buf = S35390A_FLAG_RESET | S35390A_FLAG_24H; > ~ ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ > 1 warning generated. > > Update buf to be an unsigned char, which matches the size and signedness > of the buf member in struct i2c_msg (__u8). > > https://github.com/ClangBuiltLinux/linux/issues/145 > Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx> > --- > drivers/rtc/rtc-s35390a.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c > index 77feb603cd4c..9fd51337cfae 100644 > --- a/drivers/rtc/rtc-s35390a.c > +++ b/drivers/rtc/rtc-s35390a.c > @@ -108,7 +108,7 @@ static int s35390a_get_reg(struct s35390a *s35390a, int reg, char *buf, int len) > > static int s35390a_init(struct s35390a *s35390a) > { > - char buf; > + unsigned char buf; I would use a u8 directly which has the advantage to be shorter :) > int ret; > unsigned initcount = 0; > > -- > 2.19.1 > -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
