linux-kernel - [PATCH 7/9] XArray: the NULL xa_node condition is handled in xas

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Message-Id: <20200330123643.17120-8-richard.weiyang@gmail.com>
Date:   Mon, 30 Mar 2020 12:36:41 +0000
From:   Wei Yang <richard.weiyang@...il.com>
To:     willy@...radead.org
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Wei Yang <richard.weiyang@...il.com>
Subject: [PATCH 7/9] XArray: the NULL xa_node condition is handled in xas_top

>From the last if/else check, it handles the NULL/non-NULL xa_node
mutually exclusively. While the NULL xa_node case is handled in the
first condition xas_top().

Just remove the redundant handling for NULL xa_node.

Signed-off-by: Wei Yang <richard.weiyang@...il.com>
---
 lib/xarray.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/lib/xarray.c b/lib/xarray.c
index 0c5b44def3aa..82570bbbf2a5 100644
--- a/lib/xarray.c
+++ b/lib/xarray.c
@@ -650,16 +650,12 @@ static void *xas_create(struct xa_state *xas, bool allow_root)
 		slot = &xa->xa_head;
 	} else if (xas_error(xas)) {
 		return NULL;
-	} else if (node) {
+	} else {
 		unsigned int offset = xas->xa_offset;
 
 		shift = node->shift;
 		entry = xa_entry_locked(xa, node, offset);
 		slot = &node->slots[offset];
-	} else {
-		shift = 0;
-		entry = xa_head_locked(xa);
-		slot = &xa->xa_head;
 	}
 
 	while (shift > order) {
-- 
2.23.0