All of lore.kernel.org
 help / color / mirror / Atom feed
From: Damien Lespiau <damien.lespiau@intel.com>
To: kbuild test robot <lkp@intel.com>
Cc: Shobhit Kumar <shobhit.kumar@intel.com>,
	intel-gfx@lists.freedesktop.org, kbuild-all@01.org
Subject: Re: [PATCH 7/7] drm/i915/skl: WA for watermark calculation based on Arbitrated Display BW
Date: Thu, 14 Jan 2016 17:35:54 +0000	[thread overview]
Message-ID: <20160114173554.GB19817@strange.ger.corp.intel.com> (raw)
In-Reply-To: <201601142305.iBbyUp9K%fengguang.wu@intel.com>

On Thu, Jan 14, 2016 at 11:30:31PM +0800, kbuild test robot wrote:
> Hi Mahesh,
> 
> [auto build test ERROR on drm-intel/for-linux-next]
> [also build test ERROR on next-20160114]
> [cannot apply to v4.4]
> [if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
> 
> url:    https://github.com/0day-ci/linux/commits/Shobhit-Kumar/Misc-WM-fixes-and-Arbitrated-Display-Bandwidth-WA-for-SKL/20160114-200444
> base:   git://anongit.freedesktop.org/drm-intel for-linux-next
> config: i386-defconfig (attached as .config)
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=i386 
> 
> All errors (new ones prefixed by >>):
> 
>    drivers/built-in.o: In function `skl_update_wm':
> >> intel_pm.c:(.text+0xdcbfb): undefined reference to `__udivdi3'
>    intel_pm.c:(.text+0xdccb7): undefined reference to `__udivdi3'

In case you wonder, compiling for x86 32 bits, this is most likely
because DIV_ROUND_UP() uses a stray '/' operator and you use it with 64
bit values, which will make gcc use a run-time helper function that
isn't part of the kernel.

You need to use DIV_ROUND_UP_ULL(), making sure the second parameter is
32 bits only.

HTH,

-- 
Damien
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

  reply	other threads:[~2016-01-14 17:36 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-14 12:02 [PATCH 0/7] Misc WM fixes and Arbitrated Display Bandwidth WA for SKL Shobhit Kumar
2016-01-14 12:02 ` [PATCH 1/7] drm/i915/skl+: Use proper bytes_per_pixel during WM calculation Shobhit Kumar
2016-01-14 19:07   ` Matt Roper
2016-01-19  9:56     ` Kumar, Shobhit
2016-01-14 12:02 ` [PATCH 2/7] drm/i915/skl+: Use fb size for relative data rate calculation Shobhit Kumar
2016-01-15  0:16   ` Matt Roper
2016-01-14 12:02 ` [PATCH 3/7] drm/i915/skl+: calculate ddb minimum allocation Shobhit Kumar
2016-01-15  0:39   ` Matt Roper
2016-01-14 12:02 ` [PATCH 4/7] drm/i915/skl+: calculate plane pixel rate Shobhit Kumar
2016-01-15  0:57   ` Matt Roper
2016-01-14 12:02 ` [PATCH 5/7] drm/i915/skl+: Use scaling amount for plane data rate calculation Shobhit Kumar
2016-01-15  1:15   ` Matt Roper
2016-01-14 12:02 ` [PATCH 6/7] drm/i915: Add support to parse DMI table and get platform memory info Shobhit Kumar
2016-01-15  1:44   ` Matt Roper
2016-01-27 16:04     ` Kumar, Shobhit
2016-01-14 12:02 ` [PATCH 7/7] drm/i915/skl: WA for watermark calculation based on Arbitrated Display BW Shobhit Kumar
2016-01-14 15:30   ` kbuild test robot
2016-01-14 17:35     ` Damien Lespiau [this message]
2016-01-14 17:25   ` kbuild test robot
2016-01-14 13:20 ` ✗ warning: Fi.CI.BAT Patchwork
2016-01-15  1:48 ` [PATCH 0/7] Misc WM fixes and Arbitrated Display Bandwidth WA for SKL Matt Roper
2016-01-15  5:02   ` Kumar, Shobhit
2016-01-25  4:48     ` Shobhit Kumar

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20160114173554.GB19817@strange.ger.corp.intel.com \
    --to=damien.lespiau@intel.com \
    --cc=intel-gfx@lists.freedesktop.org \
    --cc=kbuild-all@01.org \
    --cc=lkp@intel.com \
    --cc=shobhit.kumar@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.