linux-kernel - Re: [PATCH] printk: Make printk

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Date:   Sat, 24 Nov 2018 13:10:25 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:     Petr Mladek <pmladek@...e.com>
Cc:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] printk: Make printk_emit() local function.

Well, moving "__printf(3, 4) __cold" to before
"int devkmsg_emit(int facility, int level, const char *fmt, ...) {"
seems to be working. I did not know...

>From 86fff21e5fef6d3f7970cf5c07a54a907e582b52 Mon Sep 17 00:00:00 2001
From: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Date: Sat, 24 Nov 2018 13:05:25 +0900
Subject: [PATCH v2] printk: Make printk_emit() local function.

printk_emit() is called from only devkmsg_write() in the same file.
Save object size by making it a local function.

Signed-off-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
---
 include/linux/printk.h |  5 -----
 kernel/printk/printk.c | 30 ++++++++++++++----------------
 2 files changed, 14 insertions(+), 21 deletions(-)

diff --git a/include/linux/printk.h b/include/linux/printk.h
index cf3eccf..55aa969 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -166,11 +166,6 @@ int vprintk_emit(int facility, int level,
 asmlinkage __printf(1, 0)
 int vprintk(const char *fmt, va_list args);
 
-asmlinkage __printf(5, 6) __cold
-int printk_emit(int facility, int level,
-		const char *dict, size_t dictlen,
-		const char *fmt, ...);
-
 asmlinkage __printf(1, 2) __cold
 int printk(const char *fmt, ...);
 
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 1b2a029..5c2079d 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -752,6 +752,19 @@ struct devkmsg_user {
 	char buf[CONSOLE_EXT_LOG_MAX];
 };
 
+static __printf(3, 4) __cold
+int devkmsg_emit(int facility, int level, const char *fmt, ...)
+{
+	va_list args;
+	int r;
+
+	va_start(args, fmt);
+	r = vprintk_emit(facility, level, NULL, 0, fmt, args);
+	va_end(args);
+
+	return r;
+}
+
 static ssize_t devkmsg_write(struct kiocb *iocb, struct iov_iter *from)
 {
 	char *buf, *line;
@@ -810,7 +823,7 @@ static ssize_t devkmsg_write(struct kiocb *iocb, struct iov_iter *from)
 		}
 	}
 
-	printk_emit(facility, level, NULL, 0, "%s", line);
+	devkmsg_emit(facility, level, "%s", line);
 	kfree(buf);
 	return ret;
 }
@@ -1935,21 +1948,6 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 }
 EXPORT_SYMBOL(vprintk);
 
-asmlinkage int printk_emit(int facility, int level,
-			   const char *dict, size_t dictlen,
-			   const char *fmt, ...)
-{
-	va_list args;
-	int r;
-
-	va_start(args, fmt);
-	r = vprintk_emit(facility, level, dict, dictlen, fmt, args);
-	va_end(args);
-
-	return r;
-}
-EXPORT_SYMBOL(printk_emit);
-
 int vprintk_default(const char *fmt, va_list args)
 {
 	int r;
-- 
1.8.3.1