[PATCH v1] fs: proc: Fix error checking for d_hash_and_lookup()

[Yan Zhen <yanzhen@xxxxxxxx>]

The d_hash_and_lookup() function returns either an error pointer or NULL.

It might be more appropriate to check error using IS_ERR_OR_NULL().

Signed-off-by: Yan Zhen <yanzhen@xxxxxxxx>
---
 fs/proc/base.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/proc/base.c b/fs/proc/base.c
index f83d41bf155d..e08b36dd4766 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2123,7 +2123,7 @@ bool proc_fill_cache(struct file *file, struct dir_context *ctx,
 	ino_t ino = 1;
 
 	child = d_hash_and_lookup(dir, &qname);
-	if (!child) {
+	if (IS_ERR_OR_NULL(child)) {
 		DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
 		child = d_alloc_parallel(dir, &qname, &wq);
 		if (IS_ERR(child))
-- 
2.34.1