replace ->follow_link() with new method that could stay in RCU mode
new method: ->get_link(); replacement of ->follow_link(). The differences
are:
* inode and dentry are passed separately
* might be called both in RCU and non-RCU mode;
the former is indicated by passing it a NULL dentry.
* when called that way it isn't allowed to block
and should return ERR_PTR(-ECHILD) if it needs to be called
in non-RCU mode.
It's a flagday change - the old method is gone, all in-tree instances
converted. Conversion isn't hard; said that, so far very few instances
do not immediately bail out when called in RCU mode. That'll change
in the next commits.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/libfs.c b/fs/libfs.c
index c7cbfb0..8dc37fc 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -1092,14 +1092,15 @@
}
EXPORT_SYMBOL(simple_nosetlease);
-const char *simple_follow_link(struct dentry *dentry, void **cookie)
+const char *simple_get_link(struct dentry *dentry, struct inode *inode,
+ void **cookie)
{
- return d_inode(dentry)->i_link;
+ return inode->i_link;
}
-EXPORT_SYMBOL(simple_follow_link);
+EXPORT_SYMBOL(simple_get_link);
const struct inode_operations simple_symlink_inode_operations = {
- .follow_link = simple_follow_link,
+ .get_link = simple_get_link,
.readlink = generic_readlink
};
EXPORT_SYMBOL(simple_symlink_inode_operations);