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| author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2019-02-11 22:40:21 -0800 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-02-18 14:25:51 +0100 |
| commit | 4798a032abd6329519038bacbf308a2a9cb65311 (patch) | |
| tree | 38ee9c5e5667e0cb2ed1627add55d7c321863527 | |
| parent | 97430d9c47a57f22d2d051334f15233f49155f70 (diff) | |
| download | barebox-4798a032abd6329519038bacbf308a2a9cb65311.tar.gz barebox-4798a032abd6329519038bacbf308a2a9cb65311.tar.xz | |
include: Import min_not_zero() macro from Linux
Import min_not_zero() macro from Linux used by some kernel code.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | include/linux/kernel.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index ee0b48e089..849c079d0c 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -136,6 +136,16 @@ extern long long simple_strtoll(const char *,char **,unsigned int); (_max2 > _max3 ? _max2 : _max3); }) /** + * min_not_zero - return the minimum that is _not_ zero, unless both are zero + * @x: value1 + * @y: value2 + */ +#define min_not_zero(x, y) ({ \ + typeof(x) __x = (x); \ + typeof(y) __y = (y); \ + __x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); }) + +/** * clamp - return a value clamped to a given range with strict typechecking * @val: current value * @min: minimum allowable value |