From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [for-next][PATCH 5/7] ftrace: Fix accounting bug with direct->count in register_ftrace_direct()
Date: Sun, 17 Nov 2019 17:13:01 -0500 [thread overview]
Message-ID: <20191117221310.775789832@goodmis.org> (raw)
In-Reply-To: 20191117221256.228674565@goodmis.org
From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
The direct->count wasn't being updated properly, where it only was updated
when the first entry was added, but should be updated every time.
Fixes: 013bf0da04748 ("ftrace: Add ftrace_find_direct_func()")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/trace/ftrace.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 834f3556ea1e..32e4e5ffdd97 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -5093,8 +5093,7 @@ int register_ftrace_direct(unsigned long ip, unsigned long addr)
ftrace_direct_func_count--;
}
} else {
- if (!direct->count)
- direct->count++;
+ direct->count++;
}
out_unlock:
mutex_unlock(&direct_mutex);
--
2.24.0
next prev parent reply other threads:[~2019-11-17 22:13 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-17 22:12 [for-next][PATCH 0/7] tracing: Some more updates for 5.5 Steven Rostedt
2019-11-17 22:12 ` [for-next][PATCH 1/7] ftrace: Add modify_ftrace_direct() Steven Rostedt
2019-11-17 22:12 ` [for-next][PATCH 2/7] ftrace/samples: Add a sample module that implements modify_ftrace_direct() Steven Rostedt
2019-11-17 22:12 ` [for-next][PATCH 3/7] tracing: Increase SYNTH_FIELDS_MAX for synthetic_events Steven Rostedt
2019-11-17 22:13 ` [for-next][PATCH 4/7] ftrace/selftests: Fix spelling mistake "wakeing" -> "waking" Steven Rostedt
2019-11-17 22:13 ` Steven Rostedt [this message]
2019-11-17 22:13 ` [for-next][PATCH 6/7] ftrace: Add another check for match in register_ftrace_direct() Steven Rostedt
2019-11-17 22:13 ` [for-next][PATCH 7/7] ftrace: Add helper find_direct_entry() to consolidate code Steven Rostedt
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