Add <sys/types.h> to headers included for userspace in <linux/input.h>

[pandora-kernel.git] / fs / libfs.c

diff --git a/fs/libfs.c b/fs/libfs.c
index 9c50523..7145ba7 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,
@@ -74,7 +76,7 @@ int dcache_dir_close(struct inode *inode, struct file *file)
 
 loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
 {
-       down(&file->f_dentry->d_inode->i_sem);
+       mutex_lock(&file->f_dentry->d_inode->i_mutex);
        switch (origin) {
                case 1:
                        offset += file->f_pos;
@@ -82,7 +84,7 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
                        if (offset >= 0)
                                break;
                default:
-                       up(&file->f_dentry->d_inode->i_sem);
+                       mutex_unlock(&file->f_dentry->d_inode->i_mutex);
                        return -EINVAL;
        }
        if (offset != file->f_pos) {
@@ -106,7 +108,7 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
                        spin_unlock(&dcache_lock);
                }
        }
-       up(&file->f_dentry->d_inode->i_sem);
+       mutex_unlock(&file->f_dentry->d_inode->i_mutex);
        return offset;
 }
 
@@ -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,
@@ -356,7 +358,7 @@ int simple_commit_write(struct file *file, struct page *page,
 
        /*
         * No need to use i_size_read() here, the i_size
-        * cannot change under us because we hold the i_sem.
+        * cannot change under us because we hold the i_mutex.
         */
        if (pos > inode->i_size)
                i_size_write(inode, pos);
@@ -388,6 +390,7 @@ int simple_fill_super(struct super_block *s, int magic, struct tree_descr *files
        inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
        inode->i_op = &simple_dir_inode_operations;
        inode->i_fop = &simple_dir_operations;
+       inode->i_nlink = 2;
        root = d_alloc_root(inode);
        if (!root) {
                iput(inode);
@@ -529,7 +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
@@ -548,7 +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;
 
@@ -574,7 +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 */
@@ -583,7 +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;
 }
 
@@ -601,7 +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))
@@ -612,7 +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;
 }