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[Qemu-devel] [PULL 37/74] rcu_queue: remove barrier from QLIST_EMPTY_RCU
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PULL 37/74] rcu_queue: remove barrier from QLIST_EMPTY_RCU |
Date: |
Tue, 21 Aug 2018 19:02:09 +0200 |
From: "Emilio G. Cota" <address@hidden>
It's unnecessary because the pointer isn't dereferenced.
Signed-off-by: Emilio G. Cota <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
include/qemu/rcu_queue.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/qemu/rcu_queue.h b/include/qemu/rcu_queue.h
index dd7b3be..6881ea5 100644
--- a/include/qemu/rcu_queue.h
+++ b/include/qemu/rcu_queue.h
@@ -36,7 +36,7 @@ extern "C" {
/*
* List access methods.
*/
-#define QLIST_EMPTY_RCU(head) (atomic_rcu_read(&(head)->lh_first) == NULL)
+#define QLIST_EMPTY_RCU(head) (atomic_read(&(head)->lh_first) == NULL)
#define QLIST_FIRST_RCU(head) (atomic_rcu_read(&(head)->lh_first))
#define QLIST_NEXT_RCU(elm, field) (atomic_rcu_read(&(elm)->field.le_next))
--
1.8.3.1
- [Qemu-devel] [PULL 36/74] rcu_queue: use atomic_set in QLIST_REMOVE_RCU, (continued)
- [Qemu-devel] [PULL 36/74] rcu_queue: use atomic_set in QLIST_REMOVE_RCU, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 33/74] build-sys: remove glib_subprocess check, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 18/74] qsp: QEMU's Synchronization Profiler, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 48/74] qemu-guest-agent: freeze-hook to ignore dpkg files as well, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 21/74] qsp: support call site coalescing, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 32/74] kvm: add call to qemu_add_opts() for -overcommit option, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 25/74] hmp-commands: add sync-profile, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 47/74] hw/intc/apic: Switch away from old_mmio, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 28/74] update-linux-headers.sh: add qemu_fw_cfg.h, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 34/74] target-i386: Fix lcall/ljmp to call gate in IA-32e mode, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 37/74] rcu_queue: remove barrier from QLIST_EMPTY_RCU,
Paolo Bonzini <=
- [Qemu-devel] [PULL 17/74] seqlock: constify seqlock_read_begin, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 43/74] tests: add test-list-simpleq, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 44/74] tests: add test-rcu-tailq, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 49/74] module: Use QEMU_MODULE_DIR as a search path, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 51/74] seqlock: add QemuLockable support, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 41/74] test-rcu-list: access counters with atomics, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 39/74] rcu_queue: add RCU QTAILQ, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 46/74] qom: convert the CPU list to RCU, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 23/74] tests/atomic_add-bench: add -p to enable sync profiler, Paolo Bonzini, 2018/08/21
- [Qemu-devel] [PULL 52/74] cpus: protect TimerState writes with a spinlock, Paolo Bonzini, 2018/08/21