diff options
Diffstat (limited to 'fs/read_write.c')
| -rw-r--r-- | fs/read_write.c | 38 |
1 files changed, 11 insertions, 27 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index f0d1240a5c69..9ba495d5a29b 100644 --- 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) { |