linux-kernel - [PATCH v5 4/7] llist: simplify __llist_del

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230118154450.73842-4-andrzej.hajda@intel.com>
Date:   Wed, 18 Jan 2023 16:44:47 +0100
From:   Andrzej Hajda <andrzej.hajda@...el.com>
To:     linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-snps-arc@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-hexagon@...r.kernel.org, linux-ia64@...r.kernel.org,
        loongarch@...ts.linux.dev, linux-m68k@...ts.linux-m68k.org,
        linux-mips@...r.kernel.org, openrisc@...ts.librecores.org,
        linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
        linux-sh@...r.kernel.org, sparclinux@...r.kernel.org,
        linux-xtensa@...ux-xtensa.org, intel-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Cc:     Andrzej Hajda <andrzej.hajda@...el.com>,
        Arnd Bergmann <arnd@...db.de>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH v5 4/7] llist: simplify __llist_del_all

llist_del_all uses xchg, let's use __xchg here.

Signed-off-by: Andrzej Hajda <andrzej.hajda@...el.com>
---
 include/linux/llist.h | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/include/linux/llist.h b/include/linux/llist.h
index 85bda2d02d65be..4dc1d185ea98ab 100644
--- a/include/linux/llist.h
+++ b/include/linux/llist.h
@@ -50,6 +50,7 @@
 
 #include <linux/atomic.h>
 #include <linux/container_of.h>
+#include <linux/non-atomic/xchg.h>
 #include <linux/stddef.h>
 #include <linux/types.h>
 
@@ -241,10 +242,7 @@ static inline struct llist_node *llist_del_all(struct llist_head *head)
 
 static inline struct llist_node *__llist_del_all(struct llist_head *head)
 {
-	struct llist_node *first = head->first;
-
-	head->first = NULL;
-	return first;
+	return __xchg(&head->first, NULL);
 }
 
 extern struct llist_node *llist_del_first(struct llist_head *head);
-- 
2.34.1