linux-kernel - [PATCH] regulator: Make constraint debug processing conditional on DEBUG

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Date:   Mon,  5 Oct 2020 15:15:46 +0200
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Guenter Roeck <linux@...ck-us.net>
Cc:     linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH] regulator: Make constraint debug processing conditional on DEBUG

If debugging is disabled, print_constraints() does not print the actual
constraints, but still performs some processing and string formatting,
only to throw away the result later.

Fix this by moving all constraint debug processing to a separate
function, and replacing it by a dummy when debugging is disabled.
This reduces kernel size by almost 800 bytes (on arm/arm64).

Fixes: 194dbaefa0da24bb ("regulator: Lower priority of constraint logging")
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
 drivers/regulator/core.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 607c2a76bb604f96..98beccef3fcd0905 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1059,7 +1059,8 @@ static int suspend_set_initial_state(struct regulator_dev *rdev)
 	return __suspend_set_state(rdev, rstate);
 }
 
-static void print_constraints(struct regulator_dev *rdev)
+#if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
+static void print_constraints_debug(struct regulator_dev *rdev)
 {
 	struct regulation_constraints *constraints = rdev->constraints;
 	char buf[160] = "";
@@ -1127,6 +1128,16 @@ static void print_constraints(struct regulator_dev *rdev)
 		_regulator_is_enabled(rdev) ? "enabled" : "disabled");
 
 	rdev_dbg(rdev, "%s\n", buf);
+}
+#else /* !DEBUG && !CONFIG_DYNAMIC_DEBUG */
+static inline void print_constraints_debug(struct regulator_dev *rdev) {}
+#endif /* !DEBUG && !CONFIG_DYNAMIC_DEBUG */
+
+static void print_constraints(struct regulator_dev *rdev)
+{
+	struct regulation_constraints *constraints = rdev->constraints;
+
+	print_constraints_debug(rdev);
 
 	if ((constraints->min_uV != constraints->max_uV) &&
 	    !regulator_ops_is_valid(rdev, REGULATOR_CHANGE_VOLTAGE))
-- 
2.17.1