ext4: Use printf extension %pV

Using %pV reduces the number of printk calls and eliminates any
possible message interleaving from other printk calls.

In function __ext4_grp_locked_error also added KERN_CONT to some
printks.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 10290f8..c228da1 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -388,13 +388,14 @@ static void ext4_handle_error(struct super_block *sb)
 void __ext4_error(struct super_block *sb, const char *function,
                  unsigned int line, const char *fmt, ...)
 {
+       struct va_format vaf;
        va_list args;
 
        va_start(args, fmt);
-       printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: ",
-              sb->s_id, function, line, current->comm);
-       vprintk(fmt, args);
-       printk("\n");
+       vaf.fmt = fmt;
+       vaf.va = &args;
+       printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n",
+              sb->s_id, function, line, current->comm, &vaf);
        va_end(args);
 
        ext4_handle_error(sb);
@@ -543,28 +544,29 @@ void __ext4_abort(struct super_block *sb, const char *function,
                panic("EXT4-fs panic from previous error\n");
 }
 
-void ext4_msg (struct super_block * sb, const char *prefix,
-                  const char *fmt, ...)
+void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...)
 {
+       struct va_format vaf;
        va_list args;
 
        va_start(args, fmt);
-       printk("%sEXT4-fs (%s): ", prefix, sb->s_id);
-       vprintk(fmt, args);
-       printk("\n");
+       vaf.fmt = fmt;
+       vaf.va = &args;
+       printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf);
        va_end(args);
 }
 
 void __ext4_warning(struct super_block *sb, const char *function,
                    unsigned int line, const char *fmt, ...)
 {
+       struct va_format vaf;
        va_list args;
 
        va_start(args, fmt);
-       printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: ",
-              sb->s_id, function, line);
-       vprintk(fmt, args);
-       printk("\n");
+       vaf.fmt = fmt;
+       vaf.va = &args;
+       printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n",
+              sb->s_id, function, line, &vaf);
        va_end(args);
 }
 
@@ -575,21 +577,25 @@ void __ext4_grp_locked_error(const char *function, unsigned int line,
 __releases(bitlock)
 __acquires(bitlock)
 {
+       struct va_format vaf;
        va_list args;
        struct ext4_super_block *es = EXT4_SB(sb)->s_es;
 
        es->s_last_error_ino = cpu_to_le32(ino);
        es->s_last_error_block = cpu_to_le64(block);
        __save_error_info(sb, function, line);
+
        va_start(args, fmt);
+
+       vaf.fmt = fmt;
+       vaf.va = &args;
        printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u",
               sb->s_id, function, line, grp);
        if (ino)
-               printk("inode %lu: ", ino);
+               printk(KERN_CONT "inode %lu: ", ino);
        if (block)
-               printk("block %llu:", (unsigned long long) block);
-       vprintk(fmt, args);
-       printk("\n");
+               printk(KERN_CONT "block %llu:", (unsigned long long) block);
+       printk(KERN_CONT "%pV\n", &vaf);
        va_end(args);
 
        if (test_opt(sb, ERRORS_CONT)) {