VFS: Unexport do_kern_mount() and clean up simple_pin_fs()

[linux-2.6-omap-h63xx.git] / fs / libfs.c

diff --git a/fs/libfs.c b/fs/libfs.c
index 71fd08fa410301deef23dcc563f9232c92081fa9..4a3ec9ad8bed354b2d4db49bb4adf9ba454dc466 100644 (file)
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -7,6 +7,8 @@
 #include <linux/pagemap.h>
 #include <linux/mount.h>
 #include <linux/vfs.h>
+#include <linux/mutex.h>
+
 #include <asm/uaccess.h>
 
 int simple_getattr(struct vfsmount *mnt, struct dentry *dentry,
@@ -177,7 +179,7 @@ ssize_t generic_read_dir(struct file *filp, char __user *buf, size_t siz, loff_t
        return -EISDIR;
 }
 
-struct file_operations simple_dir_operations = {
+const struct file_operations simple_dir_operations = {
        .open           = dcache_dir_open,
        .release        = dcache_dir_close,
        .llseek         = dcache_dir_lseek,
@@ -422,13 +424,13 @@ out:
 
 static DEFINE_SPINLOCK(pin_fs_lock);
 
-int simple_pin_fs(char *name, struct vfsmount **mount, int *count)
+int simple_pin_fs(struct file_system_type *type, struct vfsmount **mount, int *count)
 {
        struct vfsmount *mnt = NULL;
        spin_lock(&pin_fs_lock);
        if (unlikely(!*mount)) {
                spin_unlock(&pin_fs_lock);
-               mnt = do_kern_mount(name, 0, name, NULL);
+               mnt = vfs_kern_mount(type, 0, type->name, NULL);
                if (IS_ERR(mnt))
                        return PTR_ERR(mnt);
                spin_lock(&pin_fs_lock);
@@ -530,7 +532,7 @@ struct simple_attr {
        char set_buf[24];
        void *data;
        const char *fmt;        /* format for read operation */
-       struct semaphore sem;   /* protects access to these buffers */
+       struct mutex mutex;     /* protects access to these buffers */
 };
 
 /* simple_attr_open is called by an actual attribute open file operation
@@ -549,7 +551,7 @@ int simple_attr_open(struct inode *inode, struct file *file,
        attr->set = set;
        attr->data = inode->u.generic_ip;
        attr->fmt = fmt;
-       init_MUTEX(&attr->sem);
+       mutex_init(&attr->mutex);
 
        file->private_data = attr;
 
@@ -575,7 +577,7 @@ ssize_t simple_attr_read(struct file *file, char __user *buf,
        if (!attr->get)
                return -EACCES;
 
-       down(&attr->sem);
+       mutex_lock(&attr->mutex);
        if (*ppos) /* continued read */
                size = strlen(attr->get_buf);
        else      /* first read */
@@ -584,7 +586,7 @@ ssize_t simple_attr_read(struct file *file, char __user *buf,
                                 (unsigned long long)attr->get(attr->data));
 
        ret = simple_read_from_buffer(buf, len, ppos, attr->get_buf, size);
-       up(&attr->sem);
+       mutex_unlock(&attr->mutex);
        return ret;
 }
 
@@ -602,7 +604,7 @@ ssize_t simple_attr_write(struct file *file, const char __user *buf,
        if (!attr->set)
                return -EACCES;
 
-       down(&attr->sem);
+       mutex_lock(&attr->mutex);
        ret = -EFAULT;
        size = min(sizeof(attr->set_buf) - 1, len);
        if (copy_from_user(attr->set_buf, buf, size))
@@ -613,7 +615,7 @@ ssize_t simple_attr_write(struct file *file, const char __user *buf,
        val = simple_strtol(attr->set_buf, NULL, 0);
        attr->set(attr->data, val);
 out:
-       up(&attr->sem);
+       mutex_unlock(&attr->mutex);
        return ret;
 }