linux-kernel - [PATCH] clk: Avoid invalid function names in CLK_OF

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Message-Id: <20230308-clk_of_declare-fix-v1-1-317b741e2532@kernel.org>
Date:   Wed, 08 Mar 2023 13:47:11 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     mturquette@...libre.com, sboyd@...nel.org
Cc:     linus.walleij@...aro.org, saravanak@...gle.com,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>
Subject: [PATCH] clk: Avoid invalid function names in CLK_OF_DECLARE()

After commit c28cd1f3433c ("clk: Mark a fwnode as initialized when using
CLK_OF_DECLARE() macro"), drivers/clk/mvebu/kirkwood.c fails to build:

 drivers/clk/mvebu/kirkwood.c:358:1: error: expected identifier or '('
 CLK_OF_DECLARE(98dx1135_clk, "marvell,mv98dx1135-core-clock",
 ^
 include/linux/clk-provider.h:1367:21: note: expanded from macro 'CLK_OF_DECLARE'
         static void __init name##_of_clk_init_declare(struct device_node *np) \
                            ^
 <scratch space>:124:1: note: expanded from here
 98dx1135_clk_of_clk_init_declare
 ^
 drivers/clk/mvebu/kirkwood.c:358:1: error: invalid digit 'd' in decimal constant
 include/linux/clk-provider.h:1372:34: note: expanded from macro 'CLK_OF_DECLARE'
         OF_DECLARE_1(clk, name, compat, name##_of_clk_init_declare)
                                         ^
 <scratch space>:125:3: note: expanded from here
 98dx1135_clk_of_clk_init_declare
   ^
 drivers/clk/mvebu/kirkwood.c:358:1: error: invalid digit 'd' in decimal constant
 include/linux/clk-provider.h:1372:34: note: expanded from macro 'CLK_OF_DECLARE'
         OF_DECLARE_1(clk, name, compat, name##_of_clk_init_declare)
                                         ^
 <scratch space>:125:3: note: expanded from here
 98dx1135_clk_of_clk_init_declare
   ^
 drivers/clk/mvebu/kirkwood.c:358:1: error: invalid digit 'd' in decimal constant
 include/linux/clk-provider.h:1372:34: note: expanded from macro 'CLK_OF_DECLARE'
         OF_DECLARE_1(clk, name, compat, name##_of_clk_init_declare)
                                         ^
 <scratch space>:125:3: note: expanded from here
 98dx1135_clk_of_clk_init_declare
   ^

C function names must start with either an alphabetic letter or an
underscore. To avoid generating invalid function names from clock names,
add two underscores to the beginning of the identifier.

Fixes: c28cd1f3433c ("clk: Mark a fwnode as initialized when using CLK_OF_DECLARE() macro")
Suggested-by: Saravana Kannan <saravanak@...gle.com>
Signed-off-by: Nathan Chancellor <nathan@...nel.org>
---
 include/linux/clk-provider.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index c9f5276006a0..6f3175f0678a 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -1364,12 +1364,12 @@ struct clk_hw_onecell_data {
 };
 
 #define CLK_OF_DECLARE(name, compat, fn) \
-	static void __init name##_of_clk_init_declare(struct device_node *np) \
+	static void __init __##name##_of_clk_init_declare(struct device_node *np) \
 	{								\
 		fn(np);							\
 		fwnode_dev_initialized(of_fwnode_handle(np), true);	\
 	}								\
-	OF_DECLARE_1(clk, name, compat, name##_of_clk_init_declare)
+	OF_DECLARE_1(clk, name, compat, __##name##_of_clk_init_declare)
 
 /*
  * Use this macro when you have a driver that requires two initialization

---
base-commit: 89dc65a7cc8a119c395c0931b12d7a514f9d2bcc
change-id: 20230308-clk_of_declare-fix-4fb89765923e

Best regards,
-- 
Nathan Chancellor <nathan@...nel.org>