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.
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: David Airlie <airlied@xxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Acked-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Javi Merino <javi.merino@xxxxxxx>
---
drivers/gpu/drm/i915/intel_drv.h | 3 ---
drivers/gpu/drm/i915/intel_panel.c | 1 +
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
--
1.9.1
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