[Qemu-devel] [PATCH 02/18] aio: rename bh_lock to list_lock

[Paolo Bonzini]

This will be used for AioHandlers too.  There is going to be little
or no contention, so it is better to reuse the same lock.

Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
 async.c             | 16 ++++++++--------
 include/block/aio.h |  2 +-
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/async.c b/async.c
index f992914..7e97614 100644
--- a/async.c
+++ b/async.c
@@ -50,12 +50,12 @@ QEMUBH *aio_bh_new(AioContext *ctx, QEMUBHFunc *cb, void 
*opaque)
         .cb = cb,
         .opaque = opaque,
     };
-    qemu_mutex_lock(&ctx->bh_lock);
+    qemu_mutex_lock(&ctx->list_lock);
     bh->next = ctx->first_bh;
     /* Make sure that the members are ready before putting bh into list */
     smp_wmb();
     ctx->first_bh = bh;
-    qemu_mutex_unlock(&ctx->bh_lock);
+    qemu_mutex_unlock(&ctx->list_lock);
     return bh;
 }
 
@@ -92,7 +92,7 @@ int aio_bh_poll(AioContext *ctx)
 
     /* remove deleted bhs */
     if (!ctx->walking_bh) {
-        qemu_mutex_lock(&ctx->bh_lock);
+        qemu_mutex_lock(&ctx->list_lock);
         bhp = &ctx->first_bh;
         while (*bhp) {
             bh = *bhp;
@@ -103,7 +103,7 @@ int aio_bh_poll(AioContext *ctx)
                 bhp = &bh->next;
             }
         }
-        qemu_mutex_unlock(&ctx->bh_lock);
+        qemu_mutex_unlock(&ctx->list_lock);
     }
 
     return ret;
@@ -234,7 +234,7 @@ aio_ctx_finalize(GSource     *source)
 
     thread_pool_free(ctx->thread_pool);
 
-    qemu_mutex_lock(&ctx->bh_lock);
+    qemu_mutex_lock(&ctx->list_lock);
     while (ctx->first_bh) {
         QEMUBH *next = ctx->first_bh->next;
 
@@ -244,12 +244,12 @@ aio_ctx_finalize(GSource     *source)
         g_free(ctx->first_bh);
         ctx->first_bh = next;
     }
-    qemu_mutex_unlock(&ctx->bh_lock);
+    qemu_mutex_unlock(&ctx->list_lock);
 
     aio_set_event_notifier(ctx, &ctx->notifier, NULL);
     event_notifier_cleanup(&ctx->notifier);
     rfifolock_destroy(&ctx->lock);
-    qemu_mutex_destroy(&ctx->bh_lock);
+    qemu_mutex_destroy(&ctx->list_lock);
     timerlistgroup_deinit(&ctx->tlg);
 }
 
@@ -318,7 +318,7 @@ AioContext *aio_context_new(Error **errp)
                            (EventNotifierHandler *)
                            event_notifier_dummy_cb);
     ctx->thread_pool = NULL;
-    qemu_mutex_init(&ctx->bh_lock);
+    qemu_mutex_init(&ctx->list_lock);
     rfifolock_init(&ctx->lock, NULL, NULL);
     timerlistgroup_init(&ctx->tlg, aio_timerlist_notify, ctx);
 
diff --git a/include/block/aio.h b/include/block/aio.h
index 9dd32e0..026f6c1 100644
--- a/include/block/aio.h
+++ b/include/block/aio.h
@@ -89,7 +89,7 @@ struct AioContext {
     uint32_t notify_me;
 
     /* lock to protect between bh's adders and deleter */
-    QemuMutex bh_lock;
+    QemuMutex list_lock;
 
     /* Anchor of the list of Bottom Halves belonging to the context */
     struct QEMUBH *first_bh;
-- 
2.4.3