From: tipbot@zytor.com (tip-bot for Paul E. McKenney)
To: linux-security-module@vger.kernel.org
Subject: [tip:core/rcu] keyring: Remove now-redundant smp_read_barrier_depends()
Date: Wed, 3 Jan 2018 08:05:45 -0800 [thread overview]
Message-ID: <tip-d963007c7210deebef48c5e57aa4ca4cf9c059cd@git.kernel.org> (raw)
Commit-ID: d963007c7210deebef48c5e57aa4ca4cf9c059cd
Gitweb: https://git.kernel.org/tip/d963007c7210deebef48c5e57aa4ca4cf9c059cd
Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
AuthorDate: Mon, 9 Oct 2017 12:19:27 -0700
Committer: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
CommitDate: Mon, 4 Dec 2017 10:53:14 -0800
keyring: Remove now-redundant smp_read_barrier_depends()
Now that the associative-array library properly heads dependency chains,
the various smp_read_barrier_depends() calls in security/keys/keyring.c
are no longer needed. This commit therefore removes them.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: <keyrings@vger.kernel.org>
Cc: <linux-security-module@vger.kernel.org>
Reviewed-by: James Morris <james.l.morris@oracle.com>
---
security/keys/keyring.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/security/keys/keyring.c b/security/keys/keyring.c
index d0bcceb..41bcf57 100644
--- a/security/keys/keyring.c
+++ b/security/keys/keyring.c
@@ -713,7 +713,6 @@ descend_to_keyring:
* doesn't contain any keyring pointers.
*/
shortcut = assoc_array_ptr_to_shortcut(ptr);
- smp_read_barrier_depends();
if ((shortcut->index_key[0] & ASSOC_ARRAY_FAN_MASK) != 0)
goto not_this_keyring;
@@ -723,8 +722,6 @@ descend_to_keyring:
}
node = assoc_array_ptr_to_node(ptr);
- smp_read_barrier_depends();
-
ptr = node->slots[0];
if (!assoc_array_ptr_is_meta(ptr))
goto begin_node;
@@ -736,7 +733,6 @@ descend_to_node:
kdebug("descend");
if (assoc_array_ptr_is_shortcut(ptr)) {
shortcut = assoc_array_ptr_to_shortcut(ptr);
- smp_read_barrier_depends();
ptr = READ_ONCE(shortcut->next_node);
BUG_ON(!assoc_array_ptr_is_node(ptr));
}
@@ -744,7 +740,6 @@ descend_to_node:
begin_node:
kdebug("begin_node");
- smp_read_barrier_depends();
slot = 0;
ascend_to_node:
/* Go through the slots in a node */
@@ -792,14 +787,12 @@ ascend_to_node:
if (ptr && assoc_array_ptr_is_shortcut(ptr)) {
shortcut = assoc_array_ptr_to_shortcut(ptr);
- smp_read_barrier_depends();
ptr = READ_ONCE(shortcut->back_pointer);
slot = shortcut->parent_slot;
}
if (!ptr)
goto not_this_keyring;
node = assoc_array_ptr_to_node(ptr);
- smp_read_barrier_depends();
slot++;
/* If we've ascended to the root (zero backpointer), we must have just
--
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reply other threads:[~2018-01-03 16:05 UTC|newest]
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