linux-kernel - [PATCH] regmap: use less #ifdef for LOG

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Date:   Tue,  2 Oct 2018 11:42:05 +0100
From:   Ben Dooks <ben.dooks@...ethink.co.uk>
To:     broonie@...nel.org
Cc:     gregkh@...uxfoundation.org, rafael@...nel.org,
        linux-kernel@...r.kernel.org, linux-kernel@...ts.codethink.co.uk,
        Ben Dooks <ben.dooks@...ethink.co.uk>
Subject: [PATCH] regmap: use less #ifdef for LOG_DEVICE

Move the checking of the LOG_DEVICE into a function to reduce the
number of #ifdefs and  ensure more of the code gets compiled/checked,
and make it easier to change this for internal debugging purposes
(such as checking >1 device).

Signed-off-by: Ben Dooks <ben.dooks@...ethink.co.uk>
---
 drivers/base/regmap/regmap.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 0360a90ad6b6..0d9ad7c07d51 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -35,6 +35,16 @@
  */
 #undef LOG_DEVICE
 
+#ifdef LOG_DEVICE
+static inline bool regmap_should_log(struct regmap *map)
+{
+	return (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0);
+}
+#else
+static inline bool regmap_should_log(struct regmap *map) { return false; }
+#endif
+
+
 static int _regmap_update_bits(struct regmap *map, unsigned int reg,
 			       unsigned int mask, unsigned int val,
 			       bool *change, bool force_write);
@@ -1755,10 +1765,8 @@ int _regmap_write(struct regmap *map, unsigned int reg,
 		}
 	}
 
-#ifdef LOG_DEVICE
-	if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0)
+	if (regmap_should_log(map))
 		dev_info(map->dev, "%x <= %x\n", reg, val);
-#endif
 
 	trace_regmap_reg_write(map, reg, val);
 
@@ -2450,10 +2458,8 @@ static int _regmap_read(struct regmap *map, unsigned int reg,
 
 	ret = map->reg_read(context, reg, val);
 	if (ret == 0) {
-#ifdef LOG_DEVICE
-		if (map->dev && strcmp(dev_name(map->dev), LOG_DEVICE) == 0)
+		if (regmap_should_log(map))
 			dev_info(map->dev, "%x => %x\n", reg, *val);
-#endif
 
 		trace_regmap_reg_read(map, reg, *val);
 
-- 
2.19.0