From: "Zhou, David(ChunMing)" <David1.Zhou@amd.com>
To: Julia Lawall <julia.lawall@lip6.fr>
Cc: "kbuild-all@01.org" <kbuild-all@01.org>,
"intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"Christian König" <easy2remember.chk@googlemail.com>,
"Gustavo Padovan" <gustavo@padovan.org>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Sean Paul" <sean@poorly.run>, "David Airlie" <airlied@linux.ie>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH] drm: fix call_kern.cocci warnings (fwd)
Date: Thu, 25 Oct 2018 01:28:55 +0000 [thread overview]
Message-ID: <BY1PR12MB05028BA16A21896179679800B4F70@BY1PR12MB0502.namprd12.prod.outlook.com> (raw)
In-Reply-To: <alpine.DEB.2.21.1810241955110.3776@hadrien>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
> -----Original Message-----
> From: Julia Lawall <julia.lawall@lip6.fr>
> Sent: Thursday, October 25, 2018 2:57 AM
> To: Zhou, David(ChunMing) <David1.Zhou@amd.com>
> Cc: kbuild-all@01.org; intel-gfx@lists.freedesktop.org; dri-
> devel@lists.freedesktop.org; Christian König
> <easy2remember.chk@googlemail.com>; Gustavo Padovan
> <gustavo@padovan.org>; Maarten Lankhorst
> <maarten.lankhorst@linux.intel.com>; Sean Paul <sean@poorly.run>; David
> Airlie <airlied@linux.ie>; dri-devel@lists.freedesktop.org; linux-
> kernel@vger.kernel.org
> Subject: [PATCH] drm: fix call_kern.cocci warnings (fwd)
>
> The containing function is called with a spin_lock held, so GFP_KERNEL can't
> be used.
>
> julia
>
> ---------- Forwarded message ----------
> Date: Tue, 23 Oct 2018 17:14:25 +0800
> From: kbuild test robot <lkp@intel.com>
> To: kbuild@01.org
> Cc: Julia Lawall <julia.lawall@lip6.fr>
> Subject: [PATCH] drm: fix call_kern.cocci warnings
>
> CC: kbuild-all@01.org
> CC: intel-gfx@lists.freedesktop.org
> CC: dri-devel@lists.freedesktop.org
> TO: Chunming Zhou <david1.zhou@amd.com>
> CC: "Christian König" <easy2remember.chk@googlemail.com>
> CC: Gustavo Padovan <gustavo@padovan.org>
> CC: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> CC: Sean Paul <sean@poorly.run>
> CC: David Airlie <airlied@linux.ie>
> CC: dri-devel@lists.freedesktop.org
> CC: linux-kernel@vger.kernel.org
>
> From: kbuild test robot <fengguang.wu@intel.com>
>
> drivers/gpu/drm/drm_syncobj.c:202:4-14: ERROR: function
> drm_syncobj_find_signal_pt_for_point called on line 390 inside lock on line
> 389 but uses GFP_KERNEL
>
> Find functions that refer to GFP_KERNEL but are called with locks held.
>
> Semantic patch information:
> The proposed change of converting the GFP_KERNEL is not necessarily the
> correct one. It may be desired to unlock the lock, or to not call the function
> under the lock in the first place.
>
> Generated by: scripts/coccinelle/locks/call_kern.cocci
>
> Fixes: 48197bc564c7 ("drm: add syncobj timeline support v9")
> CC: Chunming Zhou <david1.zhou@amd.com>
> Signed-off-by: kbuild test robot <fengguang.wu@intel.com>
> ---
>
> tree: git://anongit.freedesktop.org/drm/drm-tip drm-tip
> head: 8d7ffd2298c607c3e1a16f94d51450d7940fd6a7
> commit: 48197bc564c7a1888c86024a1ba4f956e0ec2300 [1968/2033] drm: add
> syncobj timeline support v9
> :::::: branch date: 4 hours ago
> :::::: commit date: 5 days ago
>
> Please take the patch only if it's a positive warning. Thanks!
>
> drm_syncobj.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> --- a/drivers/gpu/drm/drm_syncobj.c
> +++ b/drivers/gpu/drm/drm_syncobj.c
> @@ -199,7 +199,7 @@ static struct dma_fence
> (point <= syncobj->timeline)) {
> struct drm_syncobj_stub_fence *fence =
> kzalloc(sizeof(struct drm_syncobj_stub_fence),
> - GFP_KERNEL);
> + GFP_ATOMIC);
>
> if (!fence)
> return NULL;
next prev parent reply other threads:[~2018-10-25 1:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-24 18:57 [PATCH] drm: fix call_kern.cocci warnings (fwd) Julia Lawall
2018-10-25 1:28 ` Zhou, David(ChunMing) [this message]
2018-10-25 6:53 ` Christian König
2018-10-25 7:51 ` Maarten Lankhorst
2018-10-25 7:57 ` Koenig, Christian
2018-10-25 8:31 ` zhoucm1
2018-10-25 7:50 ` Maarten Lankhorst
2018-10-25 7:55 ` Christian König
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