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Subject[PATCH 12/13] autofs4 - change may_umount* functions to boolean
This patch changes the functions may_umount and may_umount_tree
to boolean functions to aid code readability.

Signed-off-by: Ian Kent <raven@themaw.net>


--- linux-2.6.15-mm4/fs/namespace.c.may_umount-to-boolean 2006-01-15 16:06:59.000000000 +0800
+++ linux-2.6.15-mm4/fs/namespace.c 2006-01-15 16:08:36.000000000 +0800
@@ -421,9 +421,9 @@ int may_umount_tree(struct vfsmount *mnt
spin_unlock(&vfsmount_lock);

if (actual_refs > minimum_refs)
- return -EBUSY;
+ return 0;

- return 0;
+ return 1;
}

EXPORT_SYMBOL(may_umount_tree);
@@ -443,10 +443,10 @@ EXPORT_SYMBOL(may_umount_tree);
*/
int may_umount(struct vfsmount *mnt)
{
- int ret = 0;
+ int ret = 1;
spin_lock(&vfsmount_lock);
if (propagate_mount_busy(mnt, 2))
- ret = -EBUSY;
+ ret = 0;
spin_unlock(&vfsmount_lock);
return ret;
}
--- linux-2.6.15-mm4/fs/autofs4/root.c.may_umount-to-boolean 2006-01-15 16:10:22.000000000 +0800
+++ linux-2.6.15-mm4/fs/autofs4/root.c 2006-01-15 16:11:35.000000000 +0800
@@ -699,7 +699,7 @@ static inline int autofs4_ask_umount(str
{
int status = 0;

- if (may_umount(mnt) == 0)
+ if (may_umount(mnt))
status = 1;

DPRINTK("returning %d", status);
--- linux-2.6.15-mm4/fs/autofs4/expire.c.may_umount-to-boolean 2006-01-15 16:10:34.000000000 +0800
+++ linux-2.6.15-mm4/fs/autofs4/expire.c 2006-01-15 16:10:54.000000000 +0800
@@ -64,7 +64,7 @@ static int autofs4_mount_busy(struct vfs
goto done;

/* Update the expiry counter if fs is busy */
- if (may_umount_tree(mnt)) {
+ if (!may_umount_tree(mnt)) {
struct autofs_info *ino = autofs4_dentry_ino(top);
ino->last_used = jiffies;
goto done;
--- linux-2.6.15-mm4/fs/autofs/dirhash.c.may_umount-to-boolean 2006-01-15 16:09:08.000000000 +0800
+++ linux-2.6.15-mm4/fs/autofs/dirhash.c 2006-01-15 16:09:46.000000000 +0800
@@ -92,7 +92,7 @@ struct autofs_dir_ent *autofs_expire(str
;
dput(dentry);

- if ( may_umount(mnt) == 0 ) {
+ if ( may_umount(mnt) ) {
mntput(mnt);
DPRINTK(("autofs: signaling expire on %s\n", ent->name));
return ent; /* Expirable! */
-
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