diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fs.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 133f0640fb24..86b50271b4f7 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2566,6 +2566,12 @@ static inline int deny_write_access(struct file *file) struct inode *inode = file_inode(file); return atomic_dec_unless_positive(&inode->i_writecount) ? 0 : -ETXTBSY; } +static inline int exclusive_deny_write_access(struct file *file) +{ + int old = 0; + struct inode *inode = file_inode(file); + return atomic_try_cmpxchg(&inode->i_writecount, &old, -1) ? 0 : -ETXTBSY; +} static inline void put_write_access(struct inode * inode) { atomic_dec(&inode->i_writecount); |