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[PULL 17/17] cpus-common: stop using mb_set/mb_read
From: |
Paolo Bonzini |
Subject: |
[PULL 17/17] cpus-common: stop using mb_set/mb_read |
Date: |
Sat, 29 Apr 2023 14:16:36 +0200 |
Use a store-release at the end of the work item, and a load-acquire when
waiting for the item to be completed. This is the standard message passing
pattern and is both enough and clearer than mb_read/mb_set.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
cpus-common.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/cpus-common.c b/cpus-common.c
index b0047e456f93..a53716deb437 100644
--- a/cpus-common.c
+++ b/cpus-common.c
@@ -157,7 +157,7 @@ void do_run_on_cpu(CPUState *cpu, run_on_cpu_func func,
run_on_cpu_data data,
wi.exclusive = false;
queue_work_on_cpu(cpu, &wi);
- while (!qatomic_mb_read(&wi.done)) {
+ while (!qatomic_load_acquire(&wi.done)) {
CPUState *self_cpu = current_cpu;
qemu_cond_wait(&qemu_work_cond, mutex);
@@ -363,7 +363,7 @@ void process_queued_cpu_work(CPUState *cpu)
if (wi->free) {
g_free(wi);
} else {
- qatomic_mb_set(&wi->done, true);
+ qatomic_store_release(&wi->done, true);
}
}
qemu_mutex_unlock(&cpu->work_mutex);
--
2.40.0
- [PULL 07/17] target/i386: Add support for AVX-IFMA in CPUID enumeration, (continued)
- [PULL 07/17] target/i386: Add support for AVX-IFMA in CPUID enumeration, Paolo Bonzini, 2023/04/29
- [PULL 08/17] target/i386: Add support for AVX-VNNI-INT8 in CPUID enumeration, Paolo Bonzini, 2023/04/29
- [PULL 10/17] target/i386: Add support for PREFETCHIT0/1 in CPUID enumeration, Paolo Bonzini, 2023/04/29
- [PULL 09/17] target/i386: Add support for AVX-NE-CONVERT in CPUID enumeration, Paolo Bonzini, 2023/04/29
- [PULL 12/17] update-linux-headers.sh: Add missing kernel headers., Paolo Bonzini, 2023/04/29
- [PULL 13/17] Update linux headers to v6.3rc5, Paolo Bonzini, 2023/04/29
- [PULL 14/17] tests: vhost-user-test: release mutex on protocol violation, Paolo Bonzini, 2023/04/29
- [PULL 16/17] async: Suppress GCC13 false positive in aio_bh_poll(), Paolo Bonzini, 2023/04/29
- [PULL 11/17] Fix libvhost-user.c compilation., Paolo Bonzini, 2023/04/29
- [PULL 15/17] target/hexagon: fix = vs. == mishap, Paolo Bonzini, 2023/04/29
- [PULL 17/17] cpus-common: stop using mb_set/mb_read,
Paolo Bonzini <=