Clamps a value to be within a given range with strict typechecking. Signed-off-by: Harvey Harrison <[EMAIL PROTECTED]> --- akpm: I've submitted a clamp_t version previously for use in libata. You may want to just roll this into that one so clamp/clamp_t go in together.
drivers/media/video/bt8xx/bttvp.h | 2 -- drivers/media/video/usbvideo/vicam.c | 6 ------ include/linux/kernel.h | 13 +++++++++++++ 3 files changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/media/video/bt8xx/bttvp.h b/drivers/media/video/bt8xx/bttvp.h index 1305d31..b38e3a0 100644 --- a/drivers/media/video/bt8xx/bttvp.h +++ b/drivers/media/video/bt8xx/bttvp.h @@ -82,8 +82,6 @@ /* Limits scaled width, which must be a multiple of 4. */ #define MAX_HACTIVE (0x3FF & -4) -#define clamp(x, low, high) min (max (low, x), high) - #define BTTV_NORMS (\ V4L2_STD_PAL | V4L2_STD_PAL_N | \ V4L2_STD_PAL_Nc | V4L2_STD_SECAM | \ diff --git a/drivers/media/video/usbvideo/vicam.c b/drivers/media/video/usbvideo/vicam.c index da1ba02..938a60d 100644 --- a/drivers/media/video/usbvideo/vicam.c +++ b/drivers/media/video/usbvideo/vicam.c @@ -70,12 +70,6 @@ #define VICAM_HEADER_SIZE 64 -#define clamp( x, l, h ) max_t( __typeof__( x ), \ - ( l ), \ - min_t( __typeof__( x ), \ - ( h ), \ - ( x ) ) ) - /* Not sure what all the bytes in these char * arrays do, but they're necessary to make * the camera work. diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 47924ce..09ee1e0 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -352,6 +352,19 @@ static inline int __attribute__ ((format (printf, 1, 2))) pr_debug(const char * _x > _y ? _x : _y; }) /* + * Clamp a value to within a given range with strict type checking + */ +#define clamp(val,min,max) ({ \ + typeof(val) __val = (val); \ + typeof(min) __min = (min); \ + typeof(max) __max = (max); \ + (void) (&__val == &__min); \ + (void) (&__val == &__max); \ + __val = __val < __min ? __min: __val; \ + __val > __max ? __max: __val; }) + + +/* * ..and if you can't take the strict * types, you can specify one yourself. * -- 1.5.4.2.200.g99e75 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/