1 files changed, 40 insertions, 35 deletions

diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index da20b48d350f..479923456a54 100644
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -31,15 +31,13 @@
 #include <asm/byteorder.h>
 #include "sysv.h"
 
-/* This is only called on sync() and umount(), when s_dirt=1. */
-static void sysv_write_super(struct super_block *sb)
+static int sysv_sync_fs(struct super_block *sb, int wait)
 {
         struct sysv_sb_info *sbi = SYSV_SB(sb);
         unsigned long time = get_seconds(), old_time;
 
+        lock_super(sb);
         lock_kernel();
-        if (sb->s_flags & MS_RDONLY)
-                goto clean;
 
         /*
          * If we are going to write out the super block,
@@ -53,18 +51,30 @@ static void sysv_write_super(struct super_block *sb)
                 *sbi->s_sb_time = cpu_to_fs32(sbi, time);
                 mark_buffer_dirty(sbi->s_bh2);
         }
-clean:
-        sb->s_dirt = 0;
+
         unlock_kernel();
+        unlock_super(sb);
+
+        return 0;
+}
+
+static void sysv_write_super(struct super_block *sb)
+{
+        if (!(sb->s_flags & MS_RDONLY))
+                sysv_sync_fs(sb, 1);
+        else
+                sb->s_dirt = 0;
 }
 
 static int sysv_remount(struct super_block *sb, int *flags, char *data)
 {
         struct sysv_sb_info *sbi = SYSV_SB(sb);
+        lock_super(sb);
         if (sbi->s_forced_ro)
                 *flags |= MS_RDONLY;
         if (!(*flags & MS_RDONLY))
                 sb->s_dirt = 1;
+        unlock_super(sb);
         return 0;
 }
 
@@ -72,6 +82,11 @@ static void sysv_put_super(struct super_block *sb)
 {
         struct sysv_sb_info *sbi = SYSV_SB(sb);
 
+        lock_kernel();
+
+        if (sb->s_dirt)
+                sysv_write_super(sb);
+
         if (!(sb->s_flags & MS_RDONLY)) {
                 /* XXX ext2 also updates the state here */
                 mark_buffer_dirty(sbi->s_bh1);
@@ -84,6 +99,8 @@ static void sysv_put_super(struct super_block *sb)
                 brelse(sbi->s_bh2);
 
         kfree(sbi);
+
+        unlock_kernel();
 }
 
 static int sysv_statfs(struct dentry *dentry, struct kstatfs *buf)
@@ -236,7 +253,7 @@ bad_inode:
         return ERR_PTR(-EIO);
 }
 
-static struct buffer_head * sysv_update_inode(struct inode * inode)
+int sysv_write_inode(struct inode *inode, int wait)
 {
         struct super_block * sb = inode->i_sb;
         struct sysv_sb_info * sbi = SYSV_SB(sb);
@@ -244,19 +261,21 @@ static struct buffer_head * sysv_update_inode(struct inode * inode)
         struct sysv_inode * raw_inode;
         struct sysv_inode_info * si;
         unsigned int ino, block;
+        int err = 0;
 
         ino = inode->i_ino;
         if (!ino || ino > sbi->s_ninodes) {
                 printk("Bad inode number on dev %s: %d is out of range\n",
                        inode->i_sb->s_id, ino);
-                return NULL;
+                return -EIO;
         }
         raw_inode = sysv_raw_inode(sb, ino, &bh);
         if (!raw_inode) {
                 printk("unable to read i-node block\n");
-                return NULL;
+                return -EIO;
         }
 
+        lock_kernel();
         raw_inode->i_mode = cpu_to_fs16(sbi, inode->i_mode);
         raw_inode->i_uid = cpu_to_fs16(sbi, fs_high2lowuid(inode->i_uid));
         raw_inode->i_gid = cpu_to_fs16(sbi, fs_high2lowgid(inode->i_gid));
@@ -272,38 +291,23 @@ static struct buffer_head * sysv_update_inode(struct inode * inode)
         for (block = 0; block < 10+1+1+1; block++)
                 write3byte(sbi, (u8 *)&si->i_data[block],
                         &raw_inode->i_data[3*block]);
+        unlock_kernel();
         mark_buffer_dirty(bh);
-        return bh;
-}
-
-int sysv_write_inode(struct inode * inode, int wait)
-{
-        struct buffer_head *bh;
-        lock_kernel();
-        bh = sysv_update_inode(inode);
+        if (wait) {
+                sync_dirty_buffer(bh);
+                if (buffer_req(bh) && !buffer_uptodate(bh)) {
+                        printk ("IO error syncing sysv inode [%s:%08x]\n",
+                                sb->s_id, ino);
+                        err = -EIO;
+                }
+        }
         brelse(bh);
-        unlock_kernel();
         return 0;
 }
 
-int sysv_sync_inode(struct inode * inode)
+int sysv_sync_inode(struct inode *inode)
 {
-        int err = 0;
-        struct buffer_head *bh;
-
-        bh = sysv_update_inode(inode);
-        if (bh && buffer_dirty(bh)) {
-                sync_dirty_buffer(bh);
-                if (buffer_req(bh) && !buffer_uptodate(bh)) {
-                        printk ("IO error syncing sysv inode [%s:%08lx]\n",
-                                inode->i_sb->s_id, inode->i_ino);
-                        err = -1;
-                }
-        }
-        else if (!bh)
-                err = -1;
-        brelse (bh);
-        return err;
+        return sysv_write_inode(inode, 1);
 }
 
 static void sysv_delete_inode(struct inode *inode)
@@ -347,6 +351,7 @@ const struct super_operations sysv_sops = {
         .delete_inode   = sysv_delete_inode,
         .put_super      = sysv_put_super,
         .write_super    = sysv_write_super,
+        .sync_fs        = sysv_sync_fs,
         .remount_fs     = sysv_remount,
         .statfs         = sysv_statfs,
 };