linux-kernel - [RFC][PATCH v3 3/4] printk: remove console_trylock_for

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Date:	Sat, 23 Jan 2016 17:15:12 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Petr Mladek <pmladek@...e.com>, Jan Kara <jack@...e.com>,
	Tejun Heo <tj@...nel.org>, Kyle McMartin <kyle@...nel.org>,
	Dave Jones <davej@...emonkey.org.uk>,
	Calvin Owens <calvinowens@...com>,
	linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Subject: [RFC][PATCH v3 3/4] printk: remove console_trylock_for_printk

Remove console_trylock_for_printk() function, it can be
replaced with console_trylock() in vprintk_emit().

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
---
 kernel/printk/printk.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index dc722fc..99925ce 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -1484,17 +1484,6 @@ static void zap_locks(void)
 	sema_init(&console_sem, 1);
 }
 
-/*
- * Try to get console ownership to actually show the kernel
- * messages from a 'printk'. Return true (and with the
- * console_lock held, and 'console_locked' set) if it
- * is successful, false otherwise.
- */
-static int console_trylock_for_printk(void)
-{
-	return console_trylock();
-}
-
 int printk_delay_msec __read_mostly;
 
 static inline void printk_delay(void)
@@ -1791,7 +1780,7 @@ asmlinkage int vprintk_emit(int facility, int level,
 		 * semaphore.  The release will print out buffers and wake up
 		 * /dev/kmsg and syslog() users.
 		 */
-		if (console_trylock_for_printk())
+		if (console_trylock())
 			console_unlock();
 		preempt_enable();
 		lockdep_on();
-- 
2.7.0