[PATCH v2] clk: mediatek: Fix all warnings for missing struct clk_onecell_data

[PATCH v2] clk: mediatek: Fix all warnings for missing struct clk_onecell_data

[sean.wang]

From: Sean Wang <sean.wang@mediatek.com>

Even though the header file linux/clk-provider.h is already being properly
included in clk-mtk.h, the definition of struct clk_onecell_data still
must depend on CONFIG_COMMON_CLK defined and thus it's possible that
below build warnings occur when CONFIG_COMMON_CLK is not being selected.

Therefore, these functions which need struct clk_onecell_data without
declaring that structure first requires simply declaring that this struct
exists prior to referencing it in clk-mtk.h

Changes from v1->v2:
enhance v1 based on two useful solutions Jean Delvare kindly suggested.

All warnings (new ones prefixed by >>):

In file included from drivers/clk/mediatek/reset.c:22:0:
>>drivers/clk/mediatek/clk-mtk.h:44:19: warning: 'struct clk_onecell_data'
declared inside parameter list will not be visible outside of
this definition or declaration
  int num, struct clk_onecell_data *clk_data);
		  ^~~~~~~~~~~~~~~~
drivers/clk/mediatek/clk-mtk.h:63:19: warning: 'struct clk_onecell_data'
declared inside parameter list will not be visible outside of
this definition or declaration
  int num, struct clk_onecell_data *clk_data);
		  ^~~~~~~~~~~~~~~~
drivers/clk/mediatek/clk-mtk.h:145:10: warning: 'struct clk_onecell_data'
declared inside parameter list will not be visible outside of
this definition or declaration
  struct clk_onecell_data *clk_data);
	 ^~~~~~~~~~~~~~~~
drivers/clk/mediatek/clk-mtk.h:164:11: warning: 'struct clk_onecell_data'
declared inside parameter list will not be visible outside of
this definition or declaration
   struct clk_onecell_data *clk_data);
	  ^~~~~~~~~~~~~~~~
drivers/clk/mediatek/clk-mtk.h:190:12: warning: 'struct clk_onecell_data'
declared inside parameter list will not be visible outside of this
definition or declaration
    struct clk_onecell_data *clk_data);
	   ^~~~~~~~~~~~~~~~

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Cc: kbuild-all@01.org
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Jean Delvare <jdelvare@suse.de>
Cc: linux-clk@vger.kernel.org
---
 drivers/clk/mediatek/clk-mtk.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/mediatek/clk-mtk.h b/drivers/clk/mediatek/clk-mtk.h
index f10250d..bf8006d 100644
--- a/drivers/clk/mediatek/clk-mtk.h
+++ b/drivers/clk/mediatek/clk-mtk.h
@@ -20,6 +20,7 @@
 #include <linux/clk-provider.h>
 
 struct clk;
+struct clk_onecell_data;
 
 #define MAX_MUX_GATE_BIT	31
 #define INVALID_MUX_GATE_BIT	(MAX_MUX_GATE_BIT + 1)
-- 
2.7.4

Re: [PATCH v2] clk: mediatek: Fix all warnings for missing struct clk_onecell_data

[Stephen Boyd]

On 12/25, sean.wang@mediatek.com wrote:
> From: Sean Wang <sean.wang@mediatek.com>
> 
> Even though the header file linux/clk-provider.h is already being properly
> included in clk-mtk.h, the definition of struct clk_onecell_data still
> must depend on CONFIG_COMMON_CLK defined and thus it's possible that
> below build warnings occur when CONFIG_COMMON_CLK is not being selected.
> 
> Therefore, these functions which need struct clk_onecell_data without
> declaring that structure first requires simply declaring that this struct
> exists prior to referencing it in clk-mtk.h
> 
> Changes from v1->v2:
> enhance v1 based on two useful solutions Jean Delvare kindly suggested.
> 
> All warnings (new ones prefixed by >>):
> 
> In file included from drivers/clk/mediatek/reset.c:22:0:
> >>drivers/clk/mediatek/clk-mtk.h:44:19: warning: 'struct clk_onecell_data'
> declared inside parameter list will not be visible outside of
> this definition or declaration
>   int num, struct clk_onecell_data *clk_data);
> 		  ^~~~~~~~~~~~~~~~
> drivers/clk/mediatek/clk-mtk.h:63:19: warning: 'struct clk_onecell_data'
> declared inside parameter list will not be visible outside of
> this definition or declaration
>   int num, struct clk_onecell_data *clk_data);
> 		  ^~~~~~~~~~~~~~~~
> drivers/clk/mediatek/clk-mtk.h:145:10: warning: 'struct clk_onecell_data'
> declared inside parameter list will not be visible outside of
> this definition or declaration
>   struct clk_onecell_data *clk_data);
> 	 ^~~~~~~~~~~~~~~~
> drivers/clk/mediatek/clk-mtk.h:164:11: warning: 'struct clk_onecell_data'
> declared inside parameter list will not be visible outside of
> this definition or declaration
>    struct clk_onecell_data *clk_data);
> 	  ^~~~~~~~~~~~~~~~
> drivers/clk/mediatek/clk-mtk.h:190:12: warning: 'struct clk_onecell_data'
> declared inside parameter list will not be visible outside of this
> definition or declaration
>     struct clk_onecell_data *clk_data);
> 	   ^~~~~~~~~~~~~~~~
> 
> Reported-by: kbuild test robot <fengguang.wu@intel.com>
> Signed-off-by: Sean Wang <sean.wang@mediatek.com>
> Cc: kbuild-all@01.org
> Cc: Stephen Boyd <sboyd@codeaurora.org>
> Cc: Jean Delvare <jdelvare@suse.de>
> Cc: linux-clk@vger.kernel.org
> ---

Applied to clk-next

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