From: Jan Kara <jack@suse.cz>
To: Matthew Wilcox <willy@infradead.org>
Cc: <linux-fsdevel@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>, Jan Kara <jack@suse.cz>
Subject: [PATCH 01/23] xarray: Remove stale comment
Date: Wed, 22 Apr 2020 17:02:34 +0200 [thread overview]
Message-ID: <20200422150256.23473-2-jack@suse.cz> (raw)
In-Reply-To: <20200422150256.23473-1-jack@suse.cz>
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@suse.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
next prev parent reply other threads:[~2020-04-22 15:06 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-22 15:02 [PATCH 0/23 v2] mm: Speedup page cache truncation Jan Kara
2020-04-22 15:02 ` Jan Kara [this message]
2020-04-22 15:02 ` [PATCH 02/23] xarray: Provide xas_erase() and xas_store_noinit() helpers Jan Kara
2020-04-22 15:02 ` [PATCH 03/23] xarray: Use xas_store_noinit() in __xa_store, __xa_insert, __xa_alloc Jan Kara
2020-04-22 15:02 ` [PATCH 04/23] xarray: Switch xa_store_range() to use xas_store_noinit() Jan Kara
2020-04-22 15:02 ` [PATCH 05/23] xarray: Use xas_erase() in __xa_erase() Jan Kara
2020-04-22 15:02 ` [PATCH 06/23] xarray: Explicitely set XA_FREE_MARK in __xa_cmpxchg() Jan Kara
2020-04-22 15:02 ` [PATCH 07/23] xarray: Switch __xa_cmpxchg() to use xas_store_noinit() Jan Kara
2020-04-22 15:02 ` [PATCH 08/23] dax: Use xas_erase() in __dax_invalidate_entry() Jan Kara
2020-04-22 15:02 ` [PATCH 09/23] dax: Use dax_store_noinit() in grab_mapping_entry() Jan Kara
2020-04-22 15:02 ` [PATCH 10/23] dax: Convert xas_store() to xas_store_noinit() Jan Kara
2020-04-22 15:02 ` [PATCH 11/23] mm: Use xas_erase() in page_cache_delete_batch() Jan Kara
2020-04-22 15:02 ` [PATCH 12/23] mm: Use xas_erase() in collapse_file() Jan Kara
2020-04-22 15:02 ` [PATCH 13/23] mm: Use xas_store_noinit() when storing non-NULL Jan Kara
2020-04-22 15:02 ` [PATCH 14/23] workingset: Use xas_store_noinit() to clear shadow entry Jan Kara
2020-04-22 15:02 ` [PATCH 15/23] swap: Use xas_erase() when removing page from swap cache Jan Kara
2020-04-22 15:02 ` [PATCH 16/23] idr: Use xas_erase() in ida_destroy() Jan Kara
2020-04-22 15:02 ` [PATCH 17/23] idr: Use xas_erase() in ida_free() Jan Kara
2020-04-22 15:02 ` [PATCH 18/23] idr: Convert xas_store() to xas_store_noinit() Jan Kara
2020-04-22 15:02 ` [PATCH 19/23] testing: Use xas_erase() to remove entries from xarray Jan Kara
2020-04-22 15:02 ` [PATCH 20/23] testing: Use xas_store_noinit() for non-NULL entries Jan Kara
2020-04-22 15:02 ` [PATCH 21/23] testing: Introduce xa_erase_order() and use it Jan Kara
2020-04-22 15:02 ` [PATCH 22/23] testing: Switch xa_store_order() to xas_store_noinit() Jan Kara
2020-04-22 15:02 ` [PATCH 23/23] xarray: Remove xas_store() Jan Kara
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