linux-kernel - [PATCH 01/23] xarray: Remove stale comment

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Message-Id: <20200422150256.23473-2-jack@suse.cz>
Date:   Wed, 22 Apr 2020 17:02:34 +0200
From:   Jan Kara <jack@...e.cz>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     <linux-fsdevel@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, Jan Kara <jack@...e.cz>
Subject: [PATCH 01/23] xarray: Remove stale comment

Since commit 7e934cf5ace1 "xarray: Fix early termination of
xas_for_each_marked" the comment is no longer relevant since
xas_for_each_marked() can cope with marked NULL entries. Remove the
comment.

Signed-off-by: Jan Kara <jack@...e.cz>
---
 lib/xarray.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/lib/xarray.c b/lib/xarray.c
index e9e641d3c0c3..dae68dd13a02 100644
--- a/lib/xarray.c
+++ b/lib/xarray.c
@@ -803,13 +803,6 @@ void *xas_store(struct xa_state *xas, void *entry)
 		xas_init_marks(xas);
 
 	for (;;) {
-		/*
-		 * Must clear the marks before setting the entry to NULL,
-		 * otherwise xas_for_each_marked may find a NULL entry and
-		 * stop early.  rcu_assign_pointer contains a release barrier
-		 * so the mark clearing will appear to happen before the
-		 * entry is set to NULL.
-		 */
 		rcu_assign_pointer(*slot, entry);
 		if (xa_is_node(next) && (!node || node->shift))
 			xas_free_nodes(xas, xa_to_node(next));
-- 
2.16.4