diff mbox series

[v10,1/7] system/physmem: Replace qemu_mutex_lock() calls with QEMU_LOCK_GUARD

Message ID 20240507143431.464382-2-mnissler@rivosinc.com (mailing list archive)
State New, archived
Headers show
Series Support message-based DMA in vfio-user server | expand

Commit Message

Mattias Nissler May 7, 2024, 2:34 p.m. UTC 
From: Philippe Mathieu-Daudé <philmd@linaro.org>

From: Philippe Mathieu-Daudé <philmd@linaro.org>

Simplify cpu_[un]register_map_client() and cpu_notify_map_clients()
by replacing the pair of qemu_mutex_lock/qemu_mutex_unlock calls by
the WITH_QEMU_LOCK_GUARD() macro.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Mattias Nissler <mnissler@rivosinc.com>
Reviewed-by: Mattias Nissler <mnissler@rivosinc.com>
---
 system/physmem.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

Comments

Peter Xu May 7, 2024, 8:02 p.m. UTC | #1 
On Tue, May 07, 2024 at 07:34:25AM -0700, Mattias Nissler wrote:
> From: Philippe Mathieu-Daudé <philmd@linaro.org>
> 
> From: Philippe Mathieu-Daudé <philmd@linaro.org>
> 
> Simplify cpu_[un]register_map_client() and cpu_notify_map_clients()
> by replacing the pair of qemu_mutex_lock/qemu_mutex_unlock calls by
> the WITH_QEMU_LOCK_GUARD() macro.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> Signed-off-by: Mattias Nissler <mnissler@rivosinc.com>
> Reviewed-by: Mattias Nissler <mnissler@rivosinc.com>

Reviewed-by: Peter Xu <peterx@redhat.com>
diff mbox series

Patch

diff --git a/system/physmem.c b/system/physmem.c
index d3a3d8a45c..5486014cf2 100644
--- a/system/physmem.c
+++ b/system/physmem.c
@@ -3086,7 +3086,7 @@  void cpu_register_map_client(QEMUBH *bh)
 {
     MapClient *client = g_malloc(sizeof(*client));
 
-    qemu_mutex_lock(&map_client_list_lock);
+    QEMU_LOCK_GUARD(&map_client_list_lock);
     client->bh = bh;
     QLIST_INSERT_HEAD(&map_client_list, client, link);
     /* Write map_client_list before reading in_use.  */
@@ -3094,7 +3094,6 @@  void cpu_register_map_client(QEMUBH *bh)
     if (!qatomic_read(&bounce.in_use)) {
         cpu_notify_map_clients_locked();
     }
-    qemu_mutex_unlock(&map_client_list_lock);
 }
 
 void cpu_exec_init_all(void)
@@ -3117,21 +3116,19 @@  void cpu_unregister_map_client(QEMUBH *bh)
 {
     MapClient *client;
 
-    qemu_mutex_lock(&map_client_list_lock);
+    QEMU_LOCK_GUARD(&map_client_list_lock);
     QLIST_FOREACH(client, &map_client_list, link) {
         if (client->bh == bh) {
             cpu_unregister_map_client_do(client);
             break;
         }
     }
-    qemu_mutex_unlock(&map_client_list_lock);
 }
 
 static void cpu_notify_map_clients(void)
 {
-    qemu_mutex_lock(&map_client_list_lock);
+    QEMU_LOCK_GUARD(&map_client_list_lock);
     cpu_notify_map_clients_locked();
-    qemu_mutex_unlock(&map_client_list_lock);
 }
 
 static bool flatview_access_valid(FlatView *fv, hwaddr addr, hwaddr len,