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Message-Id: <20220107044951.22080-2-kernelfans@gmail.com>
Date: Fri, 7 Jan 2022 12:49:49 +0800
From: Pingfan Liu <kernelfans@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Pingfan Liu <kernelfans@...il.com>,
Steven Rostedt <rostedt@...dmis.org>,
Ingo Molnar <mingo@...hat.com>
Subject: [PATCH 1/3] tracing/filter: degrade addr in filter_pred_string() from double pointer to pointer
Since FILTER_PTR_STRING has the type of "char *", it is meaningless to
convert it to "char **". Hence degrading addr from double pointer to
single.
Signed-off-by: Pingfan Liu <kernelfans@...il.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Ingo Molnar <mingo@...hat.com>
To: linux-kernel@...r.kernel.org
---
kernel/trace/trace_events_filter.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index c9124038b140..264456e1698f 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -670,11 +670,11 @@ static int filter_pred_string(struct filter_pred *pred, void *event)
/* Filter predicate for char * pointers */
static int filter_pred_pchar(struct filter_pred *pred, void *event)
{
- char **addr = (char **)(event + pred->offset);
+ char *addr = (char *)(event + pred->offset);
int cmp, match;
- int len = strlen(*addr) + 1; /* including tailing '\0' */
+ int len = strlen(addr) + 1; /* including tailing '\0' */
- cmp = pred->regex.match(*addr, &pred->regex, len);
+ cmp = pred->regex.match(addr, &pred->regex, len);
match = cmp ^ pred->not;
--
2.31.1
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