linux-kernel - [RFC PATCH v5 11/28] dyndbg: refactor ddebug_alter_site out of ddebug

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Date:   Tue, 11 May 2021 12:50:40 -0600
From:   Jim Cromie <jim.cromie@...il.com>
To:     Jason Baron <jbaron@...mai.com>, linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, Jim Cromie <jim.cromie@...il.com>
Subject: [RFC PATCH v5 11/28] dyndbg: refactor ddebug_alter_site out of ddebug_change

Move the JUMP_LABEL/static-key code to a separate function.

no functional changes.

Signed-off-by: Jim Cromie <jim.cromie@...il.com>
---
 lib/dynamic_debug.c | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 5faf49054b1d..a4ddafdbd9a1 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -191,6 +191,18 @@ static int ddebug_match_site(const struct ddebug_query *query,
 	return true;
 }
 
+static void ddebug_alter_site(struct _ddebug *dp,
+			      struct flag_settings *modifiers)
+{
+#ifdef CONFIG_JUMP_LABEL
+	if (dp->flags & _DPRINTK_FLAGS_PRINT) {
+		if (!(modifiers->flags & _DPRINTK_FLAGS_PRINT))
+			static_branch_disable(&dp->key.dd_key_true);
+	} else if (modifiers->flags & _DPRINTK_FLAGS_PRINT)
+		static_branch_enable(&dp->key.dd_key_true);
+#endif
+}
+
 /*
  * Search the tables for _ddebug's which match the given `query' and
  * apply the `flags' and `mask' to them.  Returns number of matching
@@ -227,13 +239,9 @@ static int ddebug_change(const struct ddebug_query *query,
 			newflags = (dp->flags & modifiers->mask) | modifiers->flags;
 			if (newflags == dp->flags)
 				continue;
-#ifdef CONFIG_JUMP_LABEL
-			if (dp->flags & _DPRINTK_FLAGS_PRINT) {
-				if (!(modifiers->flags & _DPRINTK_FLAGS_PRINT))
-					static_branch_disable(&dp->key.dd_key_true);
-			} else if (modifiers->flags & _DPRINTK_FLAGS_PRINT)
-				static_branch_enable(&dp->key.dd_key_true);
-#endif
+
+			ddebug_alter_site(dp, modifiers);
+
 			dp->flags = newflags;
 
 			if (dc)
-- 
2.31.1