static inline void i_size_write(struct inode *inode, loff_t i_size)
{
#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
+ preempt_disable();
write_seqcount_begin(&inode->i_size_seqcount);
inode->i_size = i_size;
write_seqcount_end(&inode->i_size_seqcount);
+ preempt_enable();
#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT)
preempt_disable();
inode->i_size = i_size;
__sb_start_write(file_inode(file)->i_sb, SB_FREEZE_WRITE, true);
}
+static inline bool file_start_write_trylock(struct file *file)
+{
+ if (!S_ISREG(file_inode(file)->i_mode))
+ return true;
+ return __sb_start_write(file_inode(file)->i_sb, SB_FREEZE_WRITE, false);
+}
+
static inline void file_end_write(struct file *file)
{
if (!S_ISREG(file_inode(file)->i_mode))