linux-kernel - [PATCH] drm/amdgpu: fix debugfs creation/removal, again

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Date:   Fri,  4 Dec 2020 00:06:43 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Dennis Li <Dennis.Li@....com>,
        Tao Zhou <tao.zhou1@....com>, Guchun Chen <guchun.chen@....com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Hawking Zhang <Hawking.Zhang@....com>,
        John Clements <john.clements@....com>,
        "Stanley.Yang" <Stanley.Yang@....com>, Le Ma <le.ma@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] drm/amdgpu: fix debugfs creation/removal, again

From: Arnd Bergmann <arnd@...db.de>

There is still a warning when CONFIG_DEBUG_FS is disabled:

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:1145:13: error: 'amdgpu_ras_debugfs_create_ctrl_node' defined but not used [-Werror=unused-function]
 1145 | static void amdgpu_ras_debugfs_create_ctrl_node(struct amdgpu_device *adev)

Change the code again to make the compiler actually drop
this code but not warn about it.

Fixes: ae2bf61ff39e ("drm/amdgpu: guard ras debugfs creation/removal based on CONFIG_DEBUG_FS")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 13 +++++--------
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h |  6 ------
 2 files changed, 5 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 9d11b847e6ef..c136bd449744 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -1167,7 +1167,7 @@ static void amdgpu_ras_debugfs_create_ctrl_node(struct amdgpu_device *adev)
 			con->dir, &con->disable_ras_err_cnt_harvest);
 }
 
-void amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
+static void amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
 		struct ras_fs_if *head)
 {
 	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
@@ -1189,7 +1189,6 @@ void amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
 
 void amdgpu_ras_debugfs_create_all(struct amdgpu_device *adev)
 {
-#if defined(CONFIG_DEBUG_FS)
 	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
 	struct ras_manager *obj;
 	struct ras_fs_if fs_info;
@@ -1198,7 +1197,7 @@ void amdgpu_ras_debugfs_create_all(struct amdgpu_device *adev)
 	 * it won't be called in resume path, no need to check
 	 * suspend and gpu reset status
 	 */
-	if (!con)
+	if (!IS_ENABLED(CONFIG_DEBUG_FS) || !con)
 		return;
 
 	amdgpu_ras_debugfs_create_ctrl_node(adev);
@@ -1212,10 +1211,9 @@ void amdgpu_ras_debugfs_create_all(struct amdgpu_device *adev)
 			amdgpu_ras_debugfs_create(adev, &fs_info);
 		}
 	}
-#endif
 }
 
-void amdgpu_ras_debugfs_remove(struct amdgpu_device *adev,
+static void amdgpu_ras_debugfs_remove(struct amdgpu_device *adev,
 		struct ras_common_if *head)
 {
 	struct ras_manager *obj = amdgpu_ras_find_obj(adev, head);
@@ -1229,7 +1227,6 @@ void amdgpu_ras_debugfs_remove(struct amdgpu_device *adev,
 
 static void amdgpu_ras_debugfs_remove_all(struct amdgpu_device *adev)
 {
-#if defined(CONFIG_DEBUG_FS)
 	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
 	struct ras_manager *obj, *tmp;
 
@@ -1238,7 +1235,6 @@ static void amdgpu_ras_debugfs_remove_all(struct amdgpu_device *adev)
 	}
 
 	con->dir = NULL;
-#endif
 }
 /* debugfs end */
 
@@ -1286,7 +1282,8 @@ static int amdgpu_ras_fs_init(struct amdgpu_device *adev)
 
 static int amdgpu_ras_fs_fini(struct amdgpu_device *adev)
 {
-	amdgpu_ras_debugfs_remove_all(adev);
+	if (IS_ENABLED(CONFIG_DEBUG_FS))
+		amdgpu_ras_debugfs_remove_all(adev);
 	amdgpu_ras_sysfs_remove_all(adev);
 	return 0;
 }
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
index 4667cce38582..762f5e46c007 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
@@ -592,14 +592,8 @@ int amdgpu_ras_sysfs_create(struct amdgpu_device *adev,
 int amdgpu_ras_sysfs_remove(struct amdgpu_device *adev,
 		struct ras_common_if *head);
 
-void amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
-		struct ras_fs_if *head);
-
 void amdgpu_ras_debugfs_create_all(struct amdgpu_device *adev);
 
-void amdgpu_ras_debugfs_remove(struct amdgpu_device *adev,
-		struct ras_common_if *head);
-
 int amdgpu_ras_error_query(struct amdgpu_device *adev,
 		struct ras_query_if *info);
 
-- 
2.27.0