1 files changed, 39 insertions, 15 deletions

diff --git a/fs/affs/super.c b/fs/affs/super.c
index 63f5183f263b..104fdcb3a7fc 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -16,6 +16,7 @@
 #include <linux/parser.h>
 #include <linux/magic.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include "affs.h"
 
 extern struct timezone sys_tz;
@@ -24,49 +25,67 @@ static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
 static int affs_remount (struct super_block *sb, int *flags, char *data);
 
 static void
+affs_commit_super(struct super_block *sb, int clean)
+{
+        struct affs_sb_info *sbi = AFFS_SB(sb);
+        struct buffer_head *bh = sbi->s_root_bh;
+        struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh);
+
+        tail->bm_flag = cpu_to_be32(clean);
+        secs_to_datestamp(get_seconds(), &tail->disk_change);
+        affs_fix_checksum(sb, bh);
+        mark_buffer_dirty(bh);
+}
+
+static void
 affs_put_super(struct super_block *sb)
 {
         struct affs_sb_info *sbi = AFFS_SB(sb);
         pr_debug("AFFS: put_super()\n");
 
-        if (!(sb->s_flags & MS_RDONLY)) {
-                AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag = cpu_to_be32(1);
-                secs_to_datestamp(get_seconds(),
-                                  &AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->disk_change);
-                affs_fix_checksum(sb, sbi->s_root_bh);
-                mark_buffer_dirty(sbi->s_root_bh);
-        }
+        lock_kernel();
+
+        if (!(sb->s_flags & MS_RDONLY))
+                affs_commit_super(sb, 1);
 
         kfree(sbi->s_prefix);
         affs_free_bitmap(sb);
         affs_brelse(sbi->s_root_bh);
         kfree(sbi);
         sb->s_fs_info = NULL;
-        return;
+
+        unlock_kernel();
 }
 
 static void
 affs_write_super(struct super_block *sb)
 {
         int clean = 2;
-        struct affs_sb_info *sbi = AFFS_SB(sb);
 
+        lock_super(sb);
         if (!(sb->s_flags & MS_RDONLY)) {
                 //      if (sbi->s_bitmap[i].bm_bh) {
                 //              if (buffer_dirty(sbi->s_bitmap[i].bm_bh)) {
                 //                      clean = 0;
-                AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag = cpu_to_be32(clean);
-                secs_to_datestamp(get_seconds(),
-                                  &AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->disk_change);
-                affs_fix_checksum(sb, sbi->s_root_bh);
-                mark_buffer_dirty(sbi->s_root_bh);
+                affs_commit_super(sb, clean);
                 sb->s_dirt = !clean;    /* redo until bitmap synced */
         } else
                 sb->s_dirt = 0;
+        unlock_super(sb);
 
         pr_debug("AFFS: write_super() at %lu, clean=%d\n", get_seconds(), clean);
 }
 
+static int
+affs_sync_fs(struct super_block *sb, int wait)
+{
+        lock_super(sb);
+        affs_commit_super(sb, 2);
+        sb->s_dirt = 0;
+        unlock_super(sb);
+        return 0;
+}
+
 static struct kmem_cache * affs_inode_cachep;
 
 static struct inode *affs_alloc_inode(struct super_block *sb)
@@ -124,6 +143,7 @@ static const struct super_operations affs_sops = {
         .clear_inode    = affs_clear_inode,
         .put_super      = affs_put_super,
         .write_super    = affs_write_super,
+        .sync_fs        = affs_sync_fs,
         .statfs         = affs_statfs,
         .remount_fs     = affs_remount,
         .show_options   = generic_show_options,
@@ -507,6 +527,7 @@ affs_remount(struct super_block *sb, int *flags, char *data)
                 kfree(new_opts);
                 return -EINVAL;
         }
+        lock_kernel();
         replace_mount_options(sb, new_opts);
 
         sbi->s_flags = mount_flags;
@@ -514,8 +535,10 @@ affs_remount(struct super_block *sb, int *flags, char *data)
         sbi->s_uid   = uid;
         sbi->s_gid   = gid;
 
-        if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
+        if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
+                unlock_kernel();
                 return 0;
+        }
         if (*flags & MS_RDONLY) {
                 sb->s_dirt = 1;
                 while (sb->s_dirt)
@@ -524,6 +547,7 @@ affs_remount(struct super_block *sb, int *flags, char *data)
         } else
                 res = affs_init_bitmap(sb, flags);
 
+        unlock_kernel();
         return res;
 }