bci: some more code for testing

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

diff --git a/fs/read_write.c b/fs/read_write.c
index f0d1240..9ba495d 100644 (file)
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -31,12 +31,12 @@ const struct file_operations generic_ro_fops = {
 
 EXPORT_SYMBOL(generic_ro_fops);
 
-loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
+loff_t
+generic_file_llseek_unlocked(struct file *file, loff_t offset, int origin)
 {
        loff_t retval;
        struct inode *inode = file->f_mapping->host;
 
-       mutex_lock(&inode->i_mutex);
        switch (origin) {
                case SEEK_END:
                        offset += inode->i_size;
@@ -46,42 +46,26 @@ loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
        }
        retval = -EINVAL;
        if (offset>=0 && offset<=inode->i_sb->s_maxbytes) {
+               /* Special lock needed here? */
                if (offset != file->f_pos) {
                        file->f_pos = offset;
                        file->f_version = 0;
                }
                retval = offset;
        }
-       mutex_unlock(&inode->i_mutex);
        return retval;
 }
+EXPORT_SYMBOL(generic_file_llseek_unlocked);
 
-EXPORT_SYMBOL(generic_file_llseek);
-
-loff_t remote_llseek(struct file *file, loff_t offset, int origin)
+loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
 {
-       loff_t retval;
-
-       lock_kernel();
-       switch (origin) {
-               case SEEK_END:
-                       offset += i_size_read(file->f_path.dentry->d_inode);
-                       break;
-               case SEEK_CUR:
-                       offset += file->f_pos;
-       }
-       retval = -EINVAL;
-       if (offset>=0 && offset<=file->f_path.dentry->d_inode->i_sb->s_maxbytes) {
-               if (offset != file->f_pos) {
-                       file->f_pos = offset;
-                       file->f_version = 0;
-               }
-               retval = offset;
-       }
-       unlock_kernel();
-       return retval;
+       loff_t n;
+       mutex_lock(&file->f_dentry->d_inode->i_mutex);
+       n = generic_file_llseek_unlocked(file, offset, origin);
+       mutex_unlock(&file->f_dentry->d_inode->i_mutex);
+       return n;
 }
-EXPORT_SYMBOL(remote_llseek);
+EXPORT_SYMBOL(generic_file_llseek);
 
 loff_t no_llseek(struct file *file, loff_t offset, int origin)
 {