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| author | Javi Merino <javi.merino@arm.com> | 2015-04-16 12:43:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-17 09:03:55 -0400 |
| commit | f766093ecb647f5a87bfa456715abbbccee547ce (patch) | |
| tree | 818e47743fc5216fe7647dca2d1d6ca4de78c824 | |
| parent | 675cf53c1deaffadc7b6a0b4afe6cdafec86bedb (diff) | |
| download | linux-stable-f766093ecb647f5a87bfa456715abbbccee547ce.tar.gz linux-stable-f766093ecb647f5a87bfa456715abbbccee547ce.tar.bz2 linux-stable-f766093ecb647f5a87bfa456715abbbccee547ce.zip | |
kernel.h: implement DIV_ROUND_CLOSEST_ULL
We have grown a number of different implementations of
DIV_ROUND_CLOSEST_ULL throughout the kernel. Move the i915 one to
kernel.h so that it can be reused.
Signed-off-by: Javi Merino <javi.merino@arm.com>
Reviewed-by: Jeff Epler <jepler@unpythonic.net>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Guenter Roeck <linux@roeck-us.net>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: Alex Elder <elder@linaro.org>
Cc: Antti Palosaari <crope@iki.fi>
Cc: Javi Merino <javi.merino@arm.com>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_drv.h | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_panel.c | 1 | ||||
| -rw-r--r-- | include/linux/kernel.h | 12 |
3 files changed, 13 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index eef79ccd0b7c..ba243db35840 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -36,9 +36,6 @@ #include <drm/drm_dp_mst_helper.h> #include <drm/drm_rect.h> -#define DIV_ROUND_CLOSEST_ULL(ll, d) \ -({ unsigned long long _tmp = (ll)+(d)/2; do_div(_tmp, d); _tmp; }) - /** * _wait_for - magic (register) wait macro * diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index d8686ce89160..08532d4ffe0a 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -30,6 +30,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/kernel.h> #include <linux/moduleparam.h> #include "intel_drv.h" diff --git a/include/linux/kernel.h b/include/linux/kernel.h index d6d630d31ef3..3a5b48e52a9e 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -103,6 +103,18 @@ (((__x) - ((__d) / 2)) / (__d)); \ } \ ) +/* + * Same as above but for u64 dividends. divisor must be a 32-bit + * number. + */ +#define DIV_ROUND_CLOSEST_ULL(x, divisor)( \ +{ \ + typeof(divisor) __d = divisor; \ + unsigned long long _tmp = (x) + (__d) / 2; \ + do_div(_tmp, __d); \ + _tmp; \ +} \ +) /* * Multiplies an integer by a fraction, while avoiding unnecessary |