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2023-08-18drm/i915: Move abs_diff() to math.hAndy Shevchenko1-0/+19
abs_diff() belongs to math.h. Move it there. This will allow others to use it. [[email protected]: add abs_diff() documentation] Link: https://lkml.kernel.org/r/[email protected] [[email protected]: fix comment, per Randy] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Andy Shevchenko <[email protected]> Reviewed-by: Jiri Slaby <[email protected]> # tty/serial Acked-by: Jani Nikula <[email protected]> Acked-by: Greg Kroah-Hartman <[email protected]> Reviewed-by: Andi Shyti <[email protected]> Reviewed-by: Philipp Zabel <[email protected]> # gpu/ipu-v3 Cc: Alexey Dobriyan <[email protected]> Cc: Daniel Vetter <[email protected]> Cc: David Airlie <[email protected]> Cc: Helge Deller <[email protected]> Cc: Imre Deak <[email protected]> Cc: Jani Nikula <[email protected]> Cc: Joonas Lahtinen <[email protected]> Cc: Rasmus Villemoes <[email protected]> Cc: Rodrigo Vivi <[email protected]> Cc: Tvrtko Ursulin <[email protected]> Cc: Randy Dunlap <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
2023-06-09include/linux/math.h: fix mult_frac() multiple argument evaluation bugAlexey Dobriyan1-11/+11
mult_frac() evaluates _all_ arguments multiple times in the body. Clarify comment while I'm at it. Link: https://lkml.kernel.org/r/f9f9fdbb-ec8e-4f5e-a998-2a58627a1a43@p183 Signed-off-by: Alexey Dobriyan <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
2022-01-30math.h: Introduce data types for fractional numbersAndy Shevchenko1-0/+12
Introduce a macro to produce data types like struct TYPE_fract { __TYPE numerator; __TYPE denominator; }; to be used in the code wherever it's needed. In the following changes convert some users to it. Signed-off-by: Andy Shevchenko <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jonathan Cameron <[email protected]>
2020-12-15kernel.h: split out mathematical helpersAndy Shevchenko1-0/+177
kernel.h is being used as a dump for all kinds of stuff for a long time. Here is the attempt to start cleaning it up by splitting out mathematical helpers. At the same time convert users in header and lib folder to use new header. Though for time being include new header back to kernel.h to avoid twisted indirected includes for existing users. [[email protected]: fix powerpc build] Link: https://lkml.kernel.org/r/[email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Andy Shevchenko <[email protected]> Cc: "Paul E. McKenney" <[email protected]> Cc: Trond Myklebust <[email protected]> Cc: Jeff Layton <[email protected]> Cc: Rasmus Villemoes <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>