Hi Dave,
I have a small fix to the following patch in the drm-fixes-mst branch to
resolve a 32-bit compile error. I've attached the patch separately and also
squashed it into the previous change.
Thanks,
Jordan
commit 6d3d3d07381401ac6b89dfd429002c9d6ffda5e3
Author: Harry Wentland <harry.wentland at amd.com>
Date: Fri Jan 22 17:07:25 2016 -0500
drm: Add drm_fixp_from_fraction and drm_fixp2int_ceil
-----Original Message-----
From: Wentland, Harry
Sent: Thursday, February 04, 2016 11:40 AM
To: Lazare, Jordan
Subject: FW: [drm:drm-fixes-mst 5/9] include/drm/drm_fixed.h:159: undefined
reference to `__aeabi_uldivmod'
-----Original Message-----
From: kbuild test robot [mailto:fengguang...@intel.com]
Sent: February 4, 2016 8:34 AM
To: Wentland, Harry <Harry.Wentland at amd.com>
Cc: kbuild-all at 01.org; Dave Airlie <airlied at redhat.com>; Deucher,
Alexander <Alexander.Deucher at amd.com>
Subject: [drm:drm-fixes-mst 5/9] include/drm/drm_fixed.h:159: undefined
reference to `__aeabi_uldivmod'
tree: git://people.freedesktop.org/~airlied/linux.git drm-fixes-mst
head: 18ddcd63d22663841b8f61ee52733736bf3a4c7e
commit: 275e06c063ea920c4b89ee293b1975080f887b00 [5/9] drm/dp/mst: Calculate
MST PBN with 31.32 fixed point
config: arm-exynos_defconfig (attached as .config)
reproduce:
wget
https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross
-O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout 275e06c063ea920c4b89ee293b1975080f887b00
# save the attached .config to linux build tree
make.cross ARCH=arm
All errors (new ones prefixed by >>):
drivers/built-in.o: In function `drm_fixp_from_fraction':
>> include/drm/drm_fixed.h:159: undefined reference to `__aeabi_uldivmod'
include/drm/drm_fixed.h:160: undefined reference to `__aeabi_uldivmod'
vim +159 include/drm/drm_fixed.h
210a0b9e Alex Deucher 2013-03-22 143 if (shift > DRM_FIXED_POINT)
210a0b9e Alex Deucher 2013-03-22 144 return result >> (shift
- DRM_FIXED_POINT);
210a0b9e Alex Deucher 2013-03-22 145
210a0b9e Alex Deucher 2013-03-22 146 return result;
210a0b9e Alex Deucher 2013-03-22 147 }
210a0b9e Alex Deucher 2013-03-22 148
6d3d3d07 Harry Wentland 2016-01-22 149 static inline s64
drm_fixp_from_fraction(s64 a, s64 b)
6d3d3d07 Harry Wentland 2016-01-22 150 {
6d3d3d07 Harry Wentland 2016-01-22 151 s64 res;
6d3d3d07 Harry Wentland 2016-01-22 152 bool a_neg = a < 0;
6d3d3d07 Harry Wentland 2016-01-22 153 bool b_neg = b < 0;
6d3d3d07 Harry Wentland 2016-01-22 154 u64 a_abs = a_neg ? -a : a;
6d3d3d07 Harry Wentland 2016-01-22 155 u64 b_abs = b_neg ? -b : b;
6d3d3d07 Harry Wentland 2016-01-22 156 u64 rem;
6d3d3d07 Harry Wentland 2016-01-22 157
6d3d3d07 Harry Wentland 2016-01-22 158 /* determine integer part */
6d3d3d07 Harry Wentland 2016-01-22 @159 u64 res_abs = a_abs / b_abs;
6d3d3d07 Harry Wentland 2016-01-22 160 rem = a_abs % b_abs;
6d3d3d07 Harry Wentland 2016-01-22 161
6d3d3d07 Harry Wentland 2016-01-22 162 /* determine fractional part */
6d3d3d07 Harry Wentland 2016-01-22 163 {
6d3d3d07 Harry Wentland 2016-01-22 164 u32 i = DRM_FIXED_POINT;
6d3d3d07 Harry Wentland 2016-01-22 165
6d3d3d07 Harry Wentland 2016-01-22 166 do {
6d3d3d07 Harry Wentland 2016-01-22 167 rem <<= 1;
:::::: The code at line 159 was first introduced by commit
:::::: 6d3d3d07381401ac6b89dfd429002c9d6ffda5e3 drm: Add drm_fixp_from_fraction
and drm_fixp2int_ceil
:::::: TO: Harry Wentland <harry.wentland at amd.com>
:::::: CC: Dave Airlie <airlied at redhat.com>
---
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