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From: Joe Perches <joe@perches.com>
To: Jan Beulich <JBeulich@novell.com>
Cc: mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86: combine printk()s in show_regs_common()
Date: Thu, 17 Feb 2011 10:53:37 -0800	[thread overview]
Message-ID: <1297968817.2856.2.camel@Joe-Laptop> (raw)
In-Reply-To: <4D5D535A0200007800032730@vpn.id2.novell.com>

On Thu, 2011-02-17 at 15:56 +0000, Jan Beulich wrote:
> Printing a single character alone when there's an immediately following
> printk() is pretty pointless (and wasteful).
> 
> Signed-off-by: Jan Beulich <jbeulich@novell.com>

Perhaps better still to use just one printk.

Signed-off-by: Joe Perches <joe@perches.com>
---
 arch/x86/kernel/process.c |   22 ++++++++++------------
 1 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index ff45541..0f43771 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -103,20 +103,18 @@ void show_regs_common(void)
 
 	/* Board Name is optional */
 	board = dmi_get_system_info(DMI_BOARD_NAME);
+	if (!board)
+		board = "";
 
 	printk(KERN_CONT "\n");
-	printk(KERN_DEFAULT "Pid: %d, comm: %.20s %s %s %.*s",
-		current->pid, current->comm, print_tainted(),
-		init_utsname()->release,
-		(int)strcspn(init_utsname()->version, " "),
-		init_utsname()->version);
-	printk(KERN_CONT " ");
-	printk(KERN_CONT "%s %s", vendor, product);
-	if (board) {
-		printk(KERN_CONT "/");
-		printk(KERN_CONT "%s", board);
-	}
-	printk(KERN_CONT "\n");
+	printk(KERN_DEFAULT "Pid: %d, comm: %.20s %s %s %.*s %s %s%s%s\n",
+	       current->pid, current->comm, print_tainted(),
+	       init_utsname()->release,
+	       (int)strcspn(init_utsname()->version, " "),
+	       init_utsname()->version,
+	       vendor, product,
+	       strlen(board) ? "/" : "",
+	       board);
 }
 
 void flush_thread(void)



  reply	other threads:[~2011-02-17 18:53 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-17 15:56 Jan Beulich
2011-02-17 18:53 ` Joe Perches [this message]
2011-02-18 10:40 ` [tip:x86/debug] x86: Combine " tip-bot for Jan Beulich
2011-02-18 19:41   ` Joe Perches
2011-02-18 20:05     ` Ingo Molnar
2011-02-18 20:19       ` Joe Perches
2011-02-18 21:15         ` Ingo Molnar

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