Am 18.09.2016 um 16:09 schrieb Baoyou Xie:
We get 7 warnings when building kernel with W=1:
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:1990:5: warning: no previous 
prototype for 'amdgpu_pre_soft_reset' [-Wmissing-prototypes]
drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c:1548:5: warning: no previous 
prototype for 'amdgpu_connector_virtual_dpms' [-Wmissing-prototypes]
drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c:1560:5: warning: no previous 
prototype for 'amdgpu_connector_virtual_set_property' [-Wmissing-prototypes]
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c:330:5: warning: no previous prototype 
for 'amdgpu_cs_list_validate' [-Wmissing-prototypes]
drivers/gpu/drm/amd/amdgpu/dce_virtual.c:98:6: warning: no previous prototype 
for 'dce_virtual_stop_mc_access' [-Wmissing-prototypes]
drivers/gpu/drm/amd/amdgpu/dce_virtual.c:130:6: warning: no previous prototype 
for 'dce_virtual_resume_mc_access' [-Wmissing-prototypes]
drivers/gpu/drm/amd/amdgpu/dce_virtual.c:136:6: warning: no previous prototype 
for 'dce_virtual_set_vga_render_state' [-Wmissing-prototypes]

In fact, all of the functions are only used in the file
in which they are declared and don't need a declaration,
but can be made static.

So this patch marks both functions with 'static'.

Signed-off-by: Baoyou Xie <baoyou....@linaro.org>

Reviewed-by: Christian König <christian.koe...@amd.com>.

---
  drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c | 6 ++++--
  drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c         | 2 +-
  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c     | 2 +-
  drivers/gpu/drm/amd/amdgpu/dce_virtual.c       | 6 +++---
  4 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
index 319a5e1..decbba5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
@@ -1545,7 +1545,8 @@ static int amdgpu_connector_virtual_mode_valid(struct 
drm_connector *connector,
        return MODE_OK;
  }
-int amdgpu_connector_virtual_dpms(struct drm_connector *connector, int mode)
+static int
+amdgpu_connector_virtual_dpms(struct drm_connector *connector, int mode)
  {
        return 0;
  }
@@ -1557,7 +1558,8 @@ amdgpu_connector_virtual_detect(struct drm_connector 
*connector, bool force)
        return connector_status_connected;
  }
-int amdgpu_connector_virtual_set_property(struct drm_connector *connector,
+static int
+amdgpu_connector_virtual_set_property(struct drm_connector *connector,
                                  struct drm_property *property,
                                  uint64_t val)
  {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index d80e5d3..b408eea 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -327,7 +327,7 @@ retry:
        return r;
  }
-int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
+static int amdgpu_cs_list_validate(struct amdgpu_cs_parser *p,
                            struct list_head *validated)
  {
        struct amdgpu_bo_list_entry *lobj;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index c38dc47..09b809d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1987,7 +1987,7 @@ static bool amdgpu_check_soft_reset(struct amdgpu_device 
*adev)
        return asic_hang;
  }
-int amdgpu_pre_soft_reset(struct amdgpu_device *adev)
+static int amdgpu_pre_soft_reset(struct amdgpu_device *adev)
  {
        int i, r = 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
index 00663a7..2d02acd 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c
@@ -95,7 +95,7 @@ static bool dce_virtual_is_display_hung(struct amdgpu_device 
*adev)
        return false;
  }
-void dce_virtual_stop_mc_access(struct amdgpu_device *adev,
+static void dce_virtual_stop_mc_access(struct amdgpu_device *adev,
                              struct amdgpu_mode_mc_save *save)
  {
        switch (adev->asic_type) {
@@ -127,13 +127,13 @@ void dce_virtual_stop_mc_access(struct amdgpu_device 
*adev,
return;
  }
-void dce_virtual_resume_mc_access(struct amdgpu_device *adev,
+static void dce_virtual_resume_mc_access(struct amdgpu_device *adev,
                                struct amdgpu_mode_mc_save *save)
  {
        return;
  }
-void dce_virtual_set_vga_render_state(struct amdgpu_device *adev,
+static void dce_virtual_set_vga_render_state(struct amdgpu_device *adev,
                                    bool render)
  {
        return;


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