ntfs: logging clean-up

- Convert spinlock/static array to va_format (inspired by Joe Perches
  help on previous logging patches).

- Convert printk(KERN_ERR to pr_warn in __ntfs_warning.

- Convert printk(KERN_ERR to pr_err in __ntfs_error.

- Convert printk(KERN_DEBUG to pr_debug in __ntfs_debug.  (Note that
  __ntfs_debug is still guarded by #if DEBUG)

- Improve !DEBUG to parse all arguments (Joe Perches).

- Sparse pr_foo() conversions in super.c

NTFS, NTFS-fs prefixes as well as 'warning' and 'error' were removed :
pr_foo() automatically adds module name and error level is already
specified.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: Anton Altaparmakov <anton@tuxera.com>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 42 insertions, 51 deletions

diff --git a/fs/ntfs/debug.c b/fs/ntfs/debug.c
index 807150e2c2b9..dd6103cc93c1 100644
--- a/fs/ntfs/debug.c
+++ b/fs/ntfs/debug.c
@@ -18,16 +18,9 @@
  * distribution in the file COPYING); if not, write to the Free Software
  * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
-
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 #include "debug.h"
 
-/*
- * A static buffer to hold the error string being displayed and a spinlock
- * to protect concurrent accesses to it.
- */
-static char err_buf[1024];
-static DEFINE_SPINLOCK(err_buf_lock);
-
 /**
  * __ntfs_warning - output a warning to the syslog
  * @function:   name of function outputting the warning
@@ -50,6 +43,7 @@ static DEFINE_SPINLOCK(err_buf_lock);
 void __ntfs_warning(const char *function, const struct super_block *sb,
                 const char *fmt, ...)
 {
+        struct va_format vaf;
         va_list args;
         int flen = 0;
 
@@ -59,17 +53,15 @@ void __ntfs_warning(const char *function, const struct super_block *sb,
 #endif
         if (function)
                 flen = strlen(function);
-        spin_lock(&err_buf_lock);
         va_start(args, fmt);
-        vsnprintf(err_buf, sizeof(err_buf), fmt, args);
-        va_end(args);
+        vaf.fmt = fmt;
+        vaf.va = &args;
         if (sb)
-                printk(KERN_ERR "NTFS-fs warning (device %s): %s(): %s\n",
-                                sb->s_id, flen ? function : "", err_buf);
+                pr_warn("(device %s): %s(): %pV\n",
+                        sb->s_id, flen ? function : "", &vaf);
         else
-                printk(KERN_ERR "NTFS-fs warning: %s(): %s\n",
-                                flen ? function : "", err_buf);
-        spin_unlock(&err_buf_lock);
+                pr_warn("%s(): %pV\n", flen ? function : "", &vaf);
+        va_end(args);
 }
 
 /**
@@ -94,6 +86,7 @@ void __ntfs_warning(const char *function, const struct super_block *sb,
 void __ntfs_error(const char *function, const struct super_block *sb,
                 const char *fmt, ...)
 {
+        struct va_format vaf;
         va_list args;
         int flen = 0;
 
@@ -103,17 +96,15 @@ void __ntfs_error(const char *function, const struct super_block *sb,
 #endif
         if (function)
                 flen = strlen(function);
-        spin_lock(&err_buf_lock);
         va_start(args, fmt);
-        vsnprintf(err_buf, sizeof(err_buf), fmt, args);
-        va_end(args);
+        vaf.fmt = fmt;
+        vaf.va = &args;
         if (sb)
-                printk(KERN_ERR "NTFS-fs error (device %s): %s(): %s\n",
-                                sb->s_id, flen ? function : "", err_buf);
+                pr_err("(device %s): %s(): %pV\n",
+                       sb->s_id, flen ? function : "", &vaf);
         else
-                printk(KERN_ERR "NTFS-fs error: %s(): %s\n",
-                                flen ? function : "", err_buf);
-        spin_unlock(&err_buf_lock);
+                pr_err("%s(): %pV\n", flen ? function : "", &vaf);
+        va_end(args);
 }
 
 #ifdef DEBUG
@@ -124,6 +115,7 @@ int debug_msgs = 0;
 void __ntfs_debug (const char *file, int line, const char *function,
                 const char *fmt, ...)
 {
+        struct va_format vaf;
         va_list args;
         int flen = 0;
 
@@ -131,13 +123,11 @@ void __ntfs_debug (const char *file, int line, const char *function,
                 return;
         if (function)
                 flen = strlen(function);
-        spin_lock(&err_buf_lock);
         va_start(args, fmt);
-        vsnprintf(err_buf, sizeof(err_buf), fmt, args);
+        vaf.fmt = fmt;
+        vaf.va = &args;
+        pr_debug("(%s, %d): %s(): %pV", file, line, flen ? function : "", &vaf);
         va_end(args);
-        printk(KERN_DEBUG "NTFS-fs DEBUG (%s, %d): %s(): %s\n", file, line,
-                        flen ? function : "", err_buf);
-        spin_unlock(&err_buf_lock);
 }
 
 /* Dump a runlist. Caller has to provide synchronisation for @rl. */
@@ -149,12 +139,12 @@ void ntfs_debug_dump_runlist(const runlist_element *rl)
 
         if (!debug_msgs)
                 return;
-        printk(KERN_DEBUG "NTFS-fs DEBUG: Dumping runlist (values in hex):\n");
+        pr_debug("Dumping runlist (values in hex):\n");
         if (!rl) {
-                printk(KERN_DEBUG "Run list not present.\n");
+                pr_debug("Run list not present.\n");
                 return;
         }
-        printk(KERN_DEBUG "VCN              LCN               Run length\n");
+        pr_debug("VCN              LCN               Run length\n");
         for (i = 0; ; i++) {
                 LCN lcn = (rl + i)->lcn;
 
@@ -163,13 +153,13 @@ void ntfs_debug_dump_runlist(const runlist_element *rl)
 
                         if (index > -LCN_ENOENT - 1)
                                 index = 3;
-                        printk(KERN_DEBUG "%-16Lx %s %-16Lx%s\n",
+                        pr_debug("%-16Lx %s %-16Lx%s\n",
                                         (long long)(rl + i)->vcn, lcn_str[index],
                                         (long long)(rl + i)->length,
                                         (rl + i)->length ? "" :
                                                 " (runlist end)");
                 } else
-                        printk(KERN_DEBUG "%-16Lx %-16Lx  %-16Lx%s\n",
+                        pr_debug("%-16Lx %-16Lx  %-16Lx%s\n",
                                         (long long)(rl + i)->vcn,
                                         (long long)(rl + i)->lcn,
                                         (long long)(rl + i)->length,
diff --git a/fs/ntfs/debug.h b/fs/ntfs/debug.h
index 53c27eaf2307..61bf091e32a8 100644
--- a/fs/ntfs/debug.h
+++ b/fs/ntfs/debug.h
@@ -48,7 +48,12 @@ extern void ntfs_debug_dump_runlist(const runlist_element *rl);
 
 #else   /* !DEBUG */
 
-#define ntfs_debug(f, a...)             do {} while (0)
+#define ntfs_debug(fmt, ...)                                            \
+do {                                                                    \
+        if (0)                                                          \
+                no_printk(fmt, ##__VA_ARGS__);                          \
+} while (0)
+
 #define ntfs_debug_dump_runlist(rl)     do {} while (0)
 
 #endif  /* !DEBUG */
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index bd5610d48242..9de2491f2926 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -19,6 +19,7 @@
  * distribution in the file COPYING); if not, write to the Free Software
  * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/stddef.h>
 #include <linux/init.h>
@@ -1896,7 +1897,7 @@ get_ctx_vol_failed:
         vol->minor_ver = vi->minor_ver;
         ntfs_attr_put_search_ctx(ctx);
         unmap_mft_record(NTFS_I(vol->vol_ino));
-        printk(KERN_INFO "NTFS volume version %i.%i.\n", vol->major_ver,
+        pr_info("volume version %i.%i.\n", vol->major_ver,
                         vol->minor_ver);
         if (vol->major_ver < 3 && NVolSparseEnabled(vol)) {
                 ntfs_warning(vol->sb, "Disabling sparse support due to NTFS "
@@ -3095,7 +3096,7 @@ static int __init init_ntfs_fs(void)
         int err = 0;
 
         /* This may be ugly but it results in pretty output so who cares. (-8 */
-        printk(KERN_INFO "NTFS driver " NTFS_VERSION " [Flags: R/"
+        pr_info("driver " NTFS_VERSION " [Flags: R/"
 #ifdef NTFS_RW
                         "W"
 #else
@@ -3115,16 +3116,15 @@ static int __init init_ntfs_fs(void)
                         sizeof(ntfs_index_context), 0 /* offset */,
                         SLAB_HWCACHE_ALIGN, NULL /* ctor */);
         if (!ntfs_index_ctx_cache) {
-                printk(KERN_CRIT "NTFS: Failed to create %s!\n",
-                                ntfs_index_ctx_cache_name);
+                pr_crit("Failed to create %s!\n", ntfs_index_ctx_cache_name);
                 goto ictx_err_out;
         }
         ntfs_attr_ctx_cache = kmem_cache_create(ntfs_attr_ctx_cache_name,
                         sizeof(ntfs_attr_search_ctx), 0 /* offset */,
                         SLAB_HWCACHE_ALIGN, NULL /* ctor */);
         if (!ntfs_attr_ctx_cache) {
-                printk(KERN_CRIT "NTFS: Failed to create %s!\n",
-                                ntfs_attr_ctx_cache_name);
+                pr_crit("NTFS: Failed to create %s!\n",
+                        ntfs_attr_ctx_cache_name);
                 goto actx_err_out;
         }
 
@@ -3132,8 +3132,7 @@ static int __init init_ntfs_fs(void)
                         (NTFS_MAX_NAME_LEN+1) * sizeof(ntfschar), 0,
                         SLAB_HWCACHE_ALIGN, NULL);
         if (!ntfs_name_cache) {
-                printk(KERN_CRIT "NTFS: Failed to create %s!\n",
-                                ntfs_name_cache_name);
+                pr_crit("Failed to create %s!\n", ntfs_name_cache_name);
                 goto name_err_out;
         }
 
@@ -3141,8 +3140,7 @@ static int __init init_ntfs_fs(void)
                         sizeof(ntfs_inode), 0,
                         SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL);
         if (!ntfs_inode_cache) {
-                printk(KERN_CRIT "NTFS: Failed to create %s!\n",
-                                ntfs_inode_cache_name);
+                pr_crit("Failed to create %s!\n", ntfs_inode_cache_name);
                 goto inode_err_out;
         }
 
@@ -3151,15 +3149,14 @@ static int __init init_ntfs_fs(void)
                         SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
                         ntfs_big_inode_init_once);
         if (!ntfs_big_inode_cache) {
-                printk(KERN_CRIT "NTFS: Failed to create %s!\n",
-                                ntfs_big_inode_cache_name);
+                pr_crit("Failed to create %s!\n", ntfs_big_inode_cache_name);
                 goto big_inode_err_out;
         }
 
         /* Register the ntfs sysctls. */
         err = ntfs_sysctl(1);
         if (err) {
-                printk(KERN_CRIT "NTFS: Failed to register NTFS sysctls!\n");
+                pr_crit("Failed to register NTFS sysctls!\n");
                 goto sysctl_err_out;
         }
 
@@ -3168,7 +3165,7 @@ static int __init init_ntfs_fs(void)
                 ntfs_debug("NTFS driver registered successfully.");
                 return 0; /* Success! */
         }
-        printk(KERN_CRIT "NTFS: Failed to register NTFS filesystem driver!\n");
+        pr_crit("Failed to register NTFS filesystem driver!\n");
 
         /* Unregister the ntfs sysctls. */
         ntfs_sysctl(0);
@@ -3184,8 +3181,7 @@ actx_err_out:
         kmem_cache_destroy(ntfs_index_ctx_cache);
 ictx_err_out:
         if (!err) {
-                printk(KERN_CRIT "NTFS: Aborting NTFS filesystem driver "
-                                "registration...\n");
+                pr_crit("Aborting NTFS filesystem driver registration...\n");
                 err = -ENOMEM;
         }
         return err;