From: Petr Mladek <pmladek@suse.com>
To: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Petr Mladek <pmladek@suse.com>
Subject: [PATCH v2 2/3] printk: Create helper function to queue deferred console handling
Date: Wed, 27 Jun 2018 16:08:16 +0200 [thread overview]
Message-ID: <20180627140817.27764-3-pmladek@suse.com> (raw)
In-Reply-To: <20180627140817.27764-1-pmladek@suse.com>
It is just a preparation step. The patch does not change
the existing behavior.
Signed-off-by: Petr Mladek <pmladek@suse.com>
---
kernel/printk/printk.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index a844c611b17c..5105ad9c5eb8 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2887,16 +2887,20 @@ void wake_up_klogd(void)
preempt_enable();
}
-int vprintk_deferred(const char *fmt, va_list args)
+void defer_console(void)
{
- int r;
-
- r = vprintk_emit(0, LOGLEVEL_SCHED, NULL, 0, fmt, args);
-
preempt_disable();
__this_cpu_or(printk_pending, PRINTK_PENDING_OUTPUT);
irq_work_queue(this_cpu_ptr(&wake_up_klogd_work));
preempt_enable();
+}
+
+int vprintk_deferred(const char *fmt, va_list args)
+{
+ int r;
+
+ r = vprintk_emit(0, LOGLEVEL_SCHED, NULL, 0, fmt, args);
+ defer_console();
return r;
}
--
2.13.7
next prev parent reply other threads:[~2018-06-27 14:08 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-27 14:08 [PATCH v2 0/3] printk: Deadlock in NMI regression Petr Mladek
2018-06-27 14:08 ` [PATCH v2 1/3] printk: Split the code for storing a message into the log buffer Petr Mladek
2018-06-28 2:10 ` Sergey Senozhatsky
2018-06-27 14:08 ` Petr Mladek [this message]
2018-06-28 2:16 ` [PATCH v2 2/3] printk: Create helper function to queue deferred console handling Sergey Senozhatsky
2018-06-28 2:19 ` Sergey Senozhatsky
2018-06-27 14:16 ` [PATCH v2 0/3] printk: Deadlock in NMI regression Sergey Senozhatsky
2018-06-27 14:23 ` Sergey Senozhatsky
2018-06-27 14:34 ` Petr Mladek
2018-06-28 9:08 ` Sergey Senozhatsky
2018-06-27 14:20 ` [PATCH v2 3/3] printk/nmi: Prevent deadlock when accessing the main log buffer in NMI Petr Mladek
2018-06-28 2:25 ` Sergey Senozhatsky
2018-06-28 9:41 ` Petr Mladek
2018-06-29 1:47 ` Sergey Senozhatsky
2018-06-29 7:25 ` Petr Mladek
2018-06-29 10:01 ` Sergey Senozhatsky
2018-06-28 2:39 ` [PATCH v2 0/3] printk: Deadlock in NMI regression Sergey Senozhatsky
2018-06-28 10:54 ` Petr Mladek
2018-06-29 1:52 ` Sergey Senozhatsky
2018-07-09 13:27 ` Petr Mladek
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