mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-07-16 13:19:56 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/i915: Move abs_diff() to math.h

Browse Source 
abs_diff() belongs to math.h.  Move it there.  This will allow others to
use it.

[andriy.shevchenko@linux.intel.com: add abs_diff() documentation]
  Link: https://lkml.kernel.org/r/20230804050934.83223-1-andriy.shevchenko@linux.intel.com
[akpm@linux-foundation.org: fix comment, per Randy]
Link: https://lkml.kernel.org/r/20230803131918.53727-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jiri Slaby <jirislaby@kernel.org> # tty/serial
Acked-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> # gpu/ipu-v3
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@gmail.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Andy Shevchenko
2023-08-03 16:19:18 +03:00
committed by Andrew Morton
parent 84c10951da
commit 46f12960aa
6 changed files with 29 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
include/linux/math.h
View File

@@ -155,6 +155,25 @@ __STRUCT_FRACT(u32)
__builtin_types_compatible_p(typeof(x), unsigned type), \
({ signed type __x = (x); __x < 0 ? -__x : __x; }), other)
/**
* abs_diff - return absolute value of the difference between the arguments
* @a: the first argument
* @b: the second argument
*
* @a and @b have to be of the same type. With this restriction we compare
* signed to signed and unsigned to unsigned. The result is the subtraction
* the smaller of the two from the bigger, hence result is always a positive
* value.
*
* Return: an absolute value of the difference between the @a and @b.
*/
#define abs_diff(a, b) ({ \
typeof(a) __a = (a); \
typeof(b) __b = (b); \
(void)(&__a == &__b); \
__a > __b ? (__a - __b) : (__b - __a); \
})
/**
* reciprocal_scale - "scale" a value into range [0, ep_ro)
* @val: value