linux-kernel - [PATCH 08/21] dynamic_debug: factor show_ddebug_query out of ddebug_parse

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Date:	Mon, 11 Jul 2011 01:46:43 -0600
From:	Jim Cromie <jim.cromie@...il.com>
To:	jbaron@...hat.com
Cc:	linux-kernel@...r.kernel.org, bvanassche@....org, joe@...ches.com,
	gregkh@...e.de, gnb@...h.org, Jim Cromie <jim.cromie@...il.com>
Subject: [PATCH 08/21] dynamic_debug: factor show_ddebug_query out of ddebug_parse_query

Will reuse for show_pending_query too.  Alloc and free
print buffer space inside ddebug_exec_queries, instead of
a permanent static allocation.

Signed-off-by: Jim Cromie <jim.cromie@...il.com>
---
 lib/dynamic_debug.c |   24 +++++++++++++++++++-----
 1 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index de2a679..81268e2 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -96,6 +96,19 @@ static char *ddebug_describe_flags(struct _ddebug *dp, char *buf,
 	return buf;
 }
 
+static char *prbuf_query;
+
+static char *show_ddebug_query(const struct ddebug_query *q)
+{
+	sprintf(prbuf_query,
+		"q->function=\"%s\" q->filename=\"%s\" "
+		"q->module=\"%s\" q->format=\"%s\" q->lineno=%u-%u",
+		q->function, q->filename, q->module, q->format,
+		q->first_lineno, q->last_lineno);
+
+	return prbuf_query;
+}
+
 /*
  * Search the tables for _ddebug's which match the given
  * `query' and apply the `flags' and `mask' to them.  Tells
@@ -344,11 +357,7 @@ static int ddebug_parse_query(char *words[], int nwords,
 	}
 
 	if (verbose)
-		pr_info("q->function=\"%s\" q->filename=\"%s\" "
-			"q->module=\"%s\" q->format=\"%s\" q->lineno=%u-%u\n",
-			query->function, query->filename,
-			query->module, query->format, query->first_lineno,
-			query->last_lineno);
+		pr_info("parsed %s\n", show_ddebug_query(query));
 
 	return 0;
 }
@@ -440,6 +449,10 @@ static int ddebug_exec_queries(char *query)
 	char *split;
 	int i, errs = 0, exitcode = 0, rc;
 
+	prbuf_query = kmalloc(1024, GFP_KERNEL);
+	if (prbuf_query == NULL)
+		return -ENOMEM;
+
 	for (i = 0; query; query = split, i++) {
 		split = strchr(query, ';');
 		if (split)
@@ -454,6 +467,7 @@ static int ddebug_exec_queries(char *query)
 			exitcode = rc;
 		}
 	}
+	kfree(prbuf_query);
 	if (verbose)
 		pr_info("processed %d queries, with %d errs\n", i, errs);
 
-- 
1.7.4.1

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