linux-kernel - [PATCH] printk: Modify operators of printed

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Message-Id: <1499482273-10638-1-git-send-email-vichy.kuo@gmail.com>
Date:   Sat,  8 Jul 2017 10:51:13 +0800
From:   Pierre Kuo <vichy.kuo@...il.com>
To:     pmladek@...e.com
Cc:     sergey.senozhatsky@...il.com, rostedt@...dmis.org,
        linux-kernel@...r.kernel.org, joe@...ches.com,
        Pierre Kuo <vichy.kuo@...il.com>
Subject: [PATCH] printk: Modify operators of printed_len

In 8b1742c9c207, we remove printk-recursion detection code in
vprintk_emit(), where it is the first place that printed_len calculated.
After removing above detection, it seems we can directly assign the
result of log_output to printed_len.

Signed-off-by: Pierre Kuo <vichy.kuo@...il.com>
---
 kernel/printk/printk.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index fc47863..a2a8cac 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -1701,7 +1701,7 @@ asmlinkage int vprintk_emit(int facility, int level,
 	size_t text_len = 0;
 	enum log_flags lflags = 0;
 	unsigned long flags;
-	int printed_len = 0;
+	int printed_len;
 	bool in_sched = false;
 
 	if (level == LOGLEVEL_SCHED) {
@@ -1754,7 +1754,7 @@ asmlinkage int vprintk_emit(int facility, int level,
 	if (dict)
 		lflags |= LOG_PREFIX|LOG_NEWLINE;
 
-	printed_len += log_output(facility, level, lflags, dict, dictlen, text, text_len);
+	printed_len = log_output(facility, level, lflags, dict, dictlen, text, text_len);
 
 	logbuf_unlock_irqrestore(flags);
 
-- 
1.7.9.5