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From: Andrzej Hajda <andrzej.hajda@intel.com>
To: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-snps-arc@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org,
	loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org,
	linux-mips@vger.kernel.org, openrisc@lists.librecores.org,
	linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org,
	linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
	linux-xtensa@linux-xtensa.org, intel-gfx@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org
Cc: Andrzej Hajda <andrzej.hajda@intel.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Rodrigo Vivi <rodrigo.vivi@intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Boqun Feng <boqun.feng@gmail.com>,
	Mark Rutland <mark.rutland@arm.com>
Subject: [PATCH v5 4/7] llist: simplify __llist_del_all
Date: Wed, 18 Jan 2023 15:44:47 +0000	[thread overview]
Message-ID: <20230118154450.73842-4-andrzej.hajda@intel.com> (raw)
In-Reply-To: <20230118154450.73842-1-andrzej.hajda@intel.com>

llist_del_all uses xchg, let's use __xchg here.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.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

  parent reply	other threads:[~2023-01-18 15:44 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-18 15:35 [PATCH v5 0/7] Introduce __xchg, non-atomic xchg Andrzej Hajda
2023-01-18 15:44 ` [PATCH v5 1/7] arch: rename all internal names __xchg to __arch_xchg Andrzej Hajda
2023-01-18 15:44   ` [PATCH v5 2/7] linux/include: add non-atomic version of xchg Andrzej Hajda
2023-02-27  9:53     ` [Intel-gfx] " Andi Shyti
2023-01-18 15:44   ` [PATCH v5 3/7] arch/*/uprobes: simplify arch_uretprobe_hijack_return_addr Andrzej Hajda
2023-02-27  9:54     ` [Intel-gfx] " Andi Shyti
2023-01-18 15:44   ` Andrzej Hajda [this message]
2023-02-27  9:55     ` [Intel-gfx] [PATCH v5 4/7] llist: simplify __llist_del_all Andi Shyti
2023-01-18 15:44   ` [PATCH v5 5/7] io_uring: use __xchg if possible Andrzej Hajda
2023-02-27  9:59     ` [Intel-gfx] " Andi Shyti
2023-01-18 15:44   ` [PATCH v5 6/7] qed: " Andrzej Hajda
2023-02-27  9:56     ` [Intel-gfx] " Andi Shyti
2023-01-18 15:44   ` [PATCH v5 7/7] drm/i915/gt: use __xchg instead of internal helper Andrzej Hajda
2023-02-27  9:58     ` [Intel-gfx] " Andi Shyti
2023-02-27  9:53   ` [Intel-gfx] [PATCH v5 1/7] arch: rename all internal names __xchg to __arch_xchg Andi Shyti
2023-02-22 10:36 ` [Intel-gfx] [PATCH v5 0/7] Introduce __xchg, non-atomic xchg Andrzej Hajda
2023-02-22 17:04 ` Peter Zijlstra
2023-02-23 21:24   ` [Intel-gfx] " Andrzej Hajda
2023-02-27 13:49     ` Peter Zijlstra
2024-04-05 14:47       ` Jani Nikula
2024-04-05 16:20         ` Andrzej Hajda

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