linux-kernel - [PATCH V3] erofs: simplify definition of the log functions

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Message-Id: <20241114013247.30821-1-gouhao@uniontech.com>
Date: Thu, 14 Nov 2024 09:32:47 +0800
From: Gou Hao <gouhao@...ontech.com>
To: xiang@...nel.org,
	chao@...nel.org
Cc: linux-erofs@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org,
	gouhaojake@....com
Subject: [PATCH V3] erofs: simplify definition of the log functions

Use printk instead of pr_info/err to reduce
redundant code.

Signed-off-by: Gou Hao <gouhao@...ontech.com>
---
 fs/erofs/internal.h | 14 ++++----------
 fs/erofs/super.c    | 28 +++++++---------------------
 2 files changed, 11 insertions(+), 31 deletions(-)

Changes:
V3:
- optimize the printing format of device

V2:
- remove 'const char  *function' from _erofs_printk
- remove pr_fmt macro, put 'erofs' prefix into printk

diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index 4efd578d7c62..116c82588661 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -20,18 +20,12 @@
 #include <linux/iomap.h>
 #include "erofs_fs.h"
 
-/* redefine pr_fmt "erofs: " */
-#undef pr_fmt
-#define pr_fmt(fmt) "erofs: " fmt
-
-__printf(3, 4) void _erofs_err(struct super_block *sb,
-			       const char *function, const char *fmt, ...);
+__printf(2, 3) void _erofs_printk(struct super_block *sb, const char *fmt, ...);
 #define erofs_err(sb, fmt, ...)	\
-	_erofs_err(sb, __func__, fmt "\n", ##__VA_ARGS__)
-__printf(3, 4) void _erofs_info(struct super_block *sb,
-			       const char *function, const char *fmt, ...);
+	_erofs_printk(sb, KERN_ERR fmt "\n", ##__VA_ARGS__)
 #define erofs_info(sb, fmt, ...) \
-	_erofs_info(sb, __func__, fmt "\n", ##__VA_ARGS__)
+	_erofs_printk(sb, KERN_INFO fmt "\n", ##__VA_ARGS__)
+
 #ifdef CONFIG_EROFS_FS_DEBUG
 #define DBG_BUGON               BUG_ON
 #else
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 666873f745da..8dcd543df0b8 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -18,37 +18,23 @@
 
 static struct kmem_cache *erofs_inode_cachep __read_mostly;
 
-void _erofs_err(struct super_block *sb, const char *func, const char *fmt, ...)
+void _erofs_printk(struct super_block *sb, const char *fmt, ...)
 {
 	struct va_format vaf;
 	va_list args;
+	int level;
 
 	va_start(args, fmt);
 
-	vaf.fmt = fmt;
+	level = printk_get_level(fmt);
+	vaf.fmt = printk_skip_level(fmt);
 	vaf.va = &args;
 
 	if (sb)
-		pr_err("(device %s): %s: %pV", sb->s_id, func, &vaf);
+		printk("%c%cerofs (device %s): %pV",
+				KERN_SOH_ASCII, level, sb->s_id, &vaf);
 	else
-		pr_err("%s: %pV", func, &vaf);
-	va_end(args);
-}
-
-void _erofs_info(struct super_block *sb, const char *func, const char *fmt, ...)
-{
-	struct va_format vaf;
-	va_list args;
-
-	va_start(args, fmt);
-
-	vaf.fmt = fmt;
-	vaf.va = &args;
-
-	if (sb)
-		pr_info("(device %s): %pV", sb->s_id, &vaf);
-	else
-		pr_info("%pV", &vaf);
+		printk("%c%cerofs: %pV", KERN_SOH_ASCII, level, &vaf);
 	va_end(args);
 }
 
-- 
2.43.0