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fold generic_readlink() into its only caller 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
hifive-unleashed-5.1
Al Viro 2018-07-19 17:35:51 -04:00
parent 69448867ab
commit f2df5da662
1 changed files with 12 additions and 24 deletions
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36
fs/namei.c
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@ -4712,29 +4712,6 @@ out:
return len;
}
/*
* A helper for ->readlink(). This should be used *ONLY* for symlinks that
* have ->get_link() not calling nd_jump_link(). Using (or not using) it
* for any given inode is up to filesystem.
*/
static int generic_readlink(struct dentry *dentry, char __user *buffer,
int buflen)
{
DEFINE_DELAYED_CALL(done);
struct inode *inode = d_inode(dentry);
const char *link = inode->i_link;
int res;
if (!link) {
link = inode->i_op->get_link(dentry, inode, &done);
if (IS_ERR(link))
return PTR_ERR(link);
}
res = readlink_copy(buffer, buflen, link);
do_delayed_call(&done);
return res;
}
/**
* vfs_readlink - copy symlink body into userspace buffer
* @dentry: dentry on which to get symbolic link
@ -4748,6 +4725,9 @@ static int generic_readlink(struct dentry *dentry, char __user *buffer,
int vfs_readlink(struct dentry *dentry, char __user *buffer, int buflen)
{
struct inode *inode = d_inode(dentry);
DEFINE_DELAYED_CALL(done);
const char *link;
int res;
if (unlikely(!(inode->i_opflags & IOP_DEFAULT_READLINK))) {
if (unlikely(inode->i_op->readlink))
@ -4761,7 +4741,15 @@ int vfs_readlink(struct dentry *dentry, char __user *buffer, int buflen)
spin_unlock(&inode->i_lock);
}
return generic_readlink(dentry, buffer, buflen);
link = inode->i_link;
if (!link) {
link = inode->i_op->get_link(dentry, inode, &done);
if (IS_ERR(link))
return PTR_ERR(link);
}
res = readlink_copy(buffer, buflen, link);
do_delayed_call(&done);
return res;
}
EXPORT_SYMBOL(vfs_readlink);