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proc_sys_fill_cache(): switch to d_alloc_parallel()

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make it usable with directory locked shared

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-04-20 16:36:09 -04:00
parent 3781764b5c
commit 76aab3ab61
1 changed files with 8 additions and 7 deletions
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15
fs/proc/proc_sysctl.c
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@ -627,18 +627,19 @@ static bool proc_sys_fill_cache(struct file *file,
child = d_lookup(dir, &qname);
if (!child) {
child = d_alloc(dir, &qname);
if (child) {
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
child = d_alloc_parallel(dir, &qname, &wq);
if (IS_ERR(child))
return false;
if (d_in_lookup(child)) {
inode = proc_sys_make_inode(dir->d_sb, head, table);
if (!inode) {
d_lookup_done(child);
dput(child);
return false;
} else {
d_set_d_op(child, &proc_sys_dentry_operations);
d_add(child, inode);
}
} else {
return false;
d_set_d_op(child, &proc_sys_dentry_operations);
d_add(child, inode);
}
}
inode = d_inode(child);