linux-kernel - [PATCH -next] drm/amdgpu: fix debugfs_simple

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Date:   Thu, 27 Jun 2019 07:45:24 +0000
From:   YueHaibing <yuehaibing@...wei.com>
To:     Alex Deucher <alexander.deucher@....com>,
        <christian.koenig@....com>, <David1.Zhou@....com>,
        <airlied@...ux.ie>, <daniel@...ll.ch>, <dan.carpenter@...cle.com>,
        <sam@...nborg.org>, <Kevin1.Wang@....com>, <Jack.Xiao@....com>,
        <Hawking.Zhang@....com>, <ray.huang@....com>
CC:     YueHaibing <yuehaibing@...wei.com>,
        <amd-gfx@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>,
        <linux-kernel@...r.kernel.org>, <kernel-janitors@...r.kernel.org>
Subject: [PATCH -next] drm/amdgpu: fix debugfs_simple_attr.cocci warnings

Use DEFINE_DEBUGFS_ATTRIBUTE rather than DEFINE_SIMPLE_ATTRIBUTE
for debugfs files.

Semantic patch information:
Rationale: DEFINE_SIMPLE_ATTRIBUTE + debugfs_create_file()
imposes some significant overhead as compared to
DEFINE_DEBUGFS_ATTRIBUTE + debugfs_create_file_unsafe().

Generated by: scripts/coccinelle/api/debugfs/debugfs_simple_attr.cocci

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index 20ce158490db..9d9f4cbbc4bd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -1082,15 +1082,15 @@ static int amdgpu_debugfs_ib_preempt(void *data, u64 val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(fops_ib_preempt, NULL,
-			amdgpu_debugfs_ib_preempt, "%llu\n");
+DEFINE_DEBUGFS_ATTRIBUTE(fops_ib_preempt, NULL, amdgpu_debugfs_ib_preempt,
+			 "%llu\n");
 
 int amdgpu_debugfs_init(struct amdgpu_device *adev)
 {
 	adev->debugfs_preempt =
-		debugfs_create_file("amdgpu_preempt_ib", 0600,
-				    adev->ddev->primary->debugfs_root,
-				    (void *)adev, &fops_ib_preempt);
+		debugfs_create_file_unsafe("amdgpu_preempt_ib", 0600,
+					   adev->ddev->primary->debugfs_root,
+					   (void *)adev, &fops_ib_preempt);
 	if (!(adev->debugfs_preempt)) {
 		DRM_ERROR("unable to create amdgpu_preempt_ib debugsfs file\n");
 		return -EIO;