intelfb: prepare for i9xx support.

[safe/jmp/linux-2.6] / fs / super.c

diff --git a/fs/super.c b/fs/super.c
index 3029421..a66f66b 100644 (file)
--- a/fs/super.c
+++ b/fs/super.c
@@ -37,6 +37,7 @@
 #include <linux/writeback.h>           /* for the emergency remount stuff */
 #include <linux/idr.h>
 #include <linux/kobject.h>
+#include <linux/mutex.h>
 #include <asm/uaccess.h>
 
 
@@ -55,11 +56,10 @@ DEFINE_SPINLOCK(sb_lock);
  */
 static struct super_block *alloc_super(void)
 {
-       struct super_block *s = kmalloc(sizeof(struct super_block),  GFP_USER);
+       struct super_block *s = kzalloc(sizeof(struct super_block),  GFP_USER);
        static struct super_operations default_op;
 
        if (s) {
-               memset(s, 0, sizeof(struct super_block));
                if (security_sb_alloc(s)) {
                        kfree(s);
                        s = NULL;
@@ -76,9 +76,9 @@ static struct super_block *alloc_super(void)
                down_write(&s->s_umount);
                s->s_count = S_BIAS;
                atomic_set(&s->s_active, 1);
-               sema_init(&s->s_vfs_rename_sem,1);
-               sema_init(&s->s_dquot.dqio_sem, 1);
-               sema_init(&s->s_dquot.dqonoff_sem, 1);
+               mutex_init(&s->s_vfs_rename_mutex);
+               mutex_init(&s->s_dquot.dqio_mutex);
+               mutex_init(&s->s_dquot.dqonoff_mutex);
                init_rwsem(&s->s_dquot.dqptr_sem);
                init_waitqueue_head(&s->s_wait_unfrozen);
                s->s_maxbytes = MAX_NON_LFS;
@@ -381,9 +381,9 @@ restart:
 void sync_filesystems(int wait)
 {
        struct super_block *sb;
-       static DECLARE_MUTEX(mutex);
+       static DEFINE_MUTEX(mutex);
 
-       down(&mutex);           /* Could be down_interruptible */
+       mutex_lock(&mutex);             /* Could be down_interruptible */
        spin_lock(&sb_lock);
        list_for_each_entry(sb, &super_blocks, s_list) {
                if (!sb->s_op->sync_fs)
@@ -412,7 +412,7 @@ restart:
                        goto restart;
        }
        spin_unlock(&sb_lock);
-       up(&mutex);
+       mutex_unlock(&mutex);
 }
 
 /**
@@ -666,6 +666,16 @@ static int test_bdev_super(struct super_block *s, void *data)
        return (void *)s->s_bdev == data;
 }
 
+static void bdev_uevent(struct block_device *bdev, enum kobject_action action)
+{
+       if (bdev->bd_disk) {
+               if (bdev->bd_part)
+                       kobject_uevent(&bdev->bd_part->kobj, action);
+               else
+                       kobject_uevent(&bdev->bd_disk->kobj, action);
+       }
+}
+
 struct super_block *get_sb_bdev(struct file_system_type *fs_type,
        int flags, const char *dev_name, void *data,
        int (*fill_super)(struct super_block *, void *, int))
@@ -683,9 +693,9 @@ struct super_block *get_sb_bdev(struct file_system_type *fs_type,
         * will protect the lockfs code from trying to start a snapshot
         * while we are mounting
         */
-       down(&bdev->bd_mount_sem);
+       mutex_lock(&bdev->bd_mount_mutex);
        s = sget(fs_type, test_bdev_super, set_bdev_super, bdev);
-       up(&bdev->bd_mount_sem);
+       mutex_unlock(&bdev->bd_mount_mutex);
        if (IS_ERR(s))
                goto out;
 
@@ -702,13 +712,15 @@ struct super_block *get_sb_bdev(struct file_system_type *fs_type,
                s->s_flags = flags;
                strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
                sb_set_blocksize(s, block_size(bdev));
-               error = fill_super(s, data, flags & MS_VERBOSE ? 1 : 0);
+               error = fill_super(s, data, flags & MS_SILENT ? 1 : 0);
                if (error) {
                        up_write(&s->s_umount);
                        deactivate_super(s);
                        s = ERR_PTR(error);
-               } else
+               } else {
                        s->s_flags |= MS_ACTIVE;
+                       bdev_uevent(bdev, KOBJ_MOUNT);
+               }
        }
 
        return s;
@@ -724,6 +736,7 @@ void kill_block_super(struct super_block *sb)
 {
        struct block_device *bdev = sb->s_bdev;
 
+       bdev_uevent(bdev, KOBJ_UMOUNT);
        generic_shutdown_super(sb);
        sync_blockdev(bdev);
        close_bdev_excl(bdev);
@@ -743,7 +756,7 @@ struct super_block *get_sb_nodev(struct file_system_type *fs_type,
 
        s->s_flags = flags;
 
-       error = fill_super(s, data, flags & MS_VERBOSE ? 1 : 0);
+       error = fill_super(s, data, flags & MS_SILENT ? 1 : 0);
        if (error) {
                up_write(&s->s_umount);
                deactivate_super(s);
@@ -772,7 +785,7 @@ struct super_block *get_sb_single(struct file_system_type *fs_type,
                return s;
        if (!s->s_root) {
                s->s_flags = flags;
-               error = fill_super(s, data, flags & MS_VERBOSE ? 1 : 0);
+               error = fill_super(s, data, flags & MS_SILENT ? 1 : 0);
                if (error) {
                        up_write(&s->s_umount);
                        deactivate_super(s);