linux-kernel - Re: [PATCH] printk: Remove no longer used second struct cont

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Date:   Fri, 16 Dec 2016 10:37:06 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Petr Mladek <pmladek@...e.com>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Joe Perches <joe@...ches.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mark Rutland <mark.rutland@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] printk: Remove no longer used second struct cont

On (12/15/16 17:23), Petr Mladek wrote:
> On Thu 2016-12-15 13:53:58, Geert Uytterhoeven wrote:
> > If CONFIG_PRINTK=n:
> > 
> >     kernel/printk/printk.c:1893: warning: ‘cont’ defined but not used
> > 
> > Note that there are actually two different struct cont definitions and
> > objects: the first one is used if CONFIG_PRINTK=y, the second one became
> > unused by removing console_cont_flush().
> > 
> > Fixes: 5c2992ee7fd8a29d ("printk: remove console flushing special cases for partial buffered lines")
> 
> Great catch. It seems that nobody tried the build without CONFIG_PRINTK
> at that time.

ok... since the patch is a cosmetic tweak... can we add several more
cosmetic changes to it? yes, I know, N things in one patch is "a bad thing",
but those extra changes don't deserve to be in a separate patch.

basically I'm talking about a bunch of 80-cols fixups.
if it's irrelevant then feel free to ignore it.

---

 kernel/printk/printk.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index bc2e220ed2b0..d09b4f0537ee 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -1194,7 +1194,8 @@ static size_t print_prefix(const struct printk_log *msg, bool syslog, char *buf)
 	return len;
 }
 
-static size_t msg_print_text(const struct printk_log *msg, bool syslog, char *buf, size_t size)
+static size_t msg_print_text(const struct printk_log *msg, bool syslog,
+		char *buf, size_t size)
 {
 	const char *text = log_text(msg);
 	size_t text_size = msg->text_len;
@@ -1636,7 +1637,8 @@ static bool cont_add(int facility, int level, enum log_flags flags, const char *
 	return true;
 }
 
-static size_t log_output(int facility, int level, enum log_flags lflags, const char *dict, size_t dictlen, char *text, size_t text_len)
+static size_t log_output(int facility, int level, enum log_flags lflags,
+		const char *dict, size_t dictlen, char *text, size_t text_len)
 {
 	/*
 	 * If an earlier line was buffered, and we're a continuation
@@ -1651,7 +1653,10 @@ static size_t log_output(int facility, int level, enum log_flags lflags, const c
 		cont_flush();
 	}
 
-	/* Skip empty continuation lines that couldn't be added - they just flush */
+	/*
+	 * Skip empty continuation lines that couldn't
+	 * be added - they just flush
+	 */
 	if (!text_len && (lflags & LOG_CONT))
 		return 0;
 
@@ -1662,7 +1667,8 @@ static size_t log_output(int facility, int level, enum log_flags lflags, const c
 	}
 
 	/* Store it in the record log */
-	return log_store(facility, level, lflags, 0, dict, dictlen, text, text_len);
+	return log_store(facility, level, lflags, 0, dict, dictlen,
+			text, text_len);
 }
 
 asmlinkage int vprintk_emit(int facility, int level,
@@ -1777,7 +1783,8 @@ 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_cpu = UINT_MAX;
 	raw_spin_unlock(&logbuf_lock);