patch-2.4.0-test3 linux/fs/buffer.c

• Lines: 120
• Date: Thu Jun 29 16:26:02 2000
• Orig file: v2.4.0-test2/linux/fs/buffer.c
• Orig date: Tue May 23 15:31:35 2000

diff -u --recursive --new-file v2.4.0-test2/linux/fs/buffer.c linux/fs/buffer.c
@@ -323,7 +323,7 @@
  *	filp may be NULL if called via the msync of a vma.
  */
  
-int file_fsync(struct file *filp, struct dentry *dentry)
+int file_fsync(struct file *filp, struct dentry *dentry, int datasync)
 {
 	struct inode * inode = dentry->d_inode;
 	struct super_block * sb;
@@ -332,7 +332,7 @@
 
 	lock_kernel();
 	/* sync the inode to buffers */
-	write_inode_now(inode);
+	write_inode_now(inode, 0);
 
 	/* sync the superblock to buffers */
 	sb = inode->i_sb;
@@ -360,12 +360,7 @@
 		goto out;
 
 	dentry = file->f_dentry;
-	if (!dentry)
-		goto out_putf;
-
 	inode = dentry->d_inode;
-	if (!inode)
-		goto out_putf;
 
 	err = -EINVAL;
 	if (!file->f_op || !file->f_op->fsync)
@@ -373,7 +368,7 @@
 
 	/* We need to protect against concurrent writers.. */
 	down(&inode->i_sem);
-	err = file->f_op->fsync(file, dentry);
+	err = file->f_op->fsync(file, dentry, 0);
 	up(&inode->i_sem);
 
 out_putf:
@@ -395,20 +390,14 @@
 		goto out;
 
 	dentry = file->f_dentry;
-	if (!dentry)
-		goto out_putf;
-
 	inode = dentry->d_inode;
-	if (!inode)
-		goto out_putf;
 
 	err = -EINVAL;
 	if (!file->f_op || !file->f_op->fsync)
 		goto out_putf;
 
-	/* this needs further work, at the moment it is identical to fsync() */
 	down(&inode->i_sem);
-	err = file->f_op->fsync(file, dentry);
+	err = file->f_op->fsync(file, dentry, 1);
 	up(&inode->i_sem);
 
 out_putf:
@@ -2101,6 +2090,7 @@
 	spin_unlock(&free_list[isize].lock);
 
 	page->buffers = bh;
+	page->flags &= ~(1 << PG_referenced);
 	lru_cache_add(page);
 	atomic_inc(&buffermem_pages);
 	return 1;
@@ -2499,7 +2489,7 @@
  * the syscall above, but now we launch it ourselves internally with
  * kernel_thread(...)  directly after the first thread in init/main.c
  */
-int bdflush(void * unused) 
+int bdflush(void *sem)
 {
 	struct task_struct *tsk = current;
 	int flushed;
@@ -2521,6 +2511,8 @@
 	recalc_sigpending(tsk);
 	spin_unlock_irq(&tsk->sigmask_lock);
 
+	up((struct semaphore *)sem);
+
 	for (;;) {
 		CHECK_EMERGENCY_SYNC
 
@@ -2555,7 +2547,7 @@
  * You don't need to change your userspace configuration since
  * the userspace `update` will do_exit(0) at the first sys_bdflush().
  */
-int kupdate(void * unused) 
+int kupdate(void *sem)
 {
 	struct task_struct * tsk = current;
 	int interval;
@@ -2571,6 +2563,8 @@
 	recalc_sigpending(tsk);
 	spin_unlock_irq(&tsk->sigmask_lock);
 
+	up((struct semaphore *)sem);
+
 	for (;;) {
 		/* update interval */
 		interval = bdf_prm.b_un.interval;
@@ -2604,8 +2598,11 @@
 
 static int __init bdflush_init(void)
 {
-	kernel_thread(bdflush, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
-	kernel_thread(kupdate, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
+	DECLARE_MUTEX_LOCKED(sem);
+	kernel_thread(bdflush, &sem, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
+	down(&sem);
+	kernel_thread(kupdate, &sem, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
+	down(&sem);
 	return 0;
 }