[PULL 9/9] migration: Replaced qemu_mutex_lock calls with QEMU_LOCK_GUARD

["Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>]

From: Mahmoud Mandour <ma.mandourr@gmail.com>

Replaced various qemu_mutex_lock calls and their respective
qemu_mutex_unlock calls with QEMU_LOCK_GUARD macro. This simplifies
the code by eliminating the respective qemu_mutex_unlock calls.

Signed-off-by: Mahmoud Mandour <ma.mandourr@gmail.com>
Message-Id: <20210311031538.5325-7-ma.mandourr@gmail.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 migration/migration.c | 6 ++----
 migration/ram.c       | 6 ++----
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/migration/migration.c b/migration/migration.c
index a5ddf43559..36768391b6 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -323,7 +323,7 @@ static int migrate_send_rp_message(MigrationIncomingState *mis,
     int ret = 0;
 
     trace_migrate_send_rp_message((int)message_type, len);
-    qemu_mutex_lock(&mis->rp_mutex);
+    QEMU_LOCK_GUARD(&mis->rp_mutex);
 
     /*
      * It's possible that the file handle got lost due to network
@@ -331,7 +331,7 @@ static int migrate_send_rp_message(MigrationIncomingState *mis,
      */
     if (!mis->to_src_file) {
         ret = -EIO;
-        goto error;
+        return ret;
     }
 
     qemu_put_be16(mis->to_src_file, (unsigned int)message_type);
@@ -342,8 +342,6 @@ static int migrate_send_rp_message(MigrationIncomingState *mis,
     /* It's possible that qemu file got error during sending */
     ret = qemu_file_get_error(mis->to_src_file);
 
-error:
-    qemu_mutex_unlock(&mis->rp_mutex);
     return ret;
 }
 
diff --git a/migration/ram.c b/migration/ram.c
index 72143da0ac..52537f14ac 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -819,7 +819,7 @@ static inline bool migration_bitmap_clear_dirty(RAMState *rs,
 {
     bool ret;
 
-    qemu_mutex_lock(&rs->bitmap_mutex);
+    QEMU_LOCK_GUARD(&rs->bitmap_mutex);
 
     /*
      * Clear dirty bitmap if needed.  This _must_ be called before we
@@ -852,7 +852,6 @@ static inline bool migration_bitmap_clear_dirty(RAMState *rs,
     if (ret) {
         rs->migration_dirty_pages--;
     }
-    qemu_mutex_unlock(&rs->bitmap_mutex);
 
     return ret;
 }
@@ -3275,7 +3274,7 @@ static void decompress_data_with_multi_threads(QEMUFile *f,
     int idx, thread_count;
 
     thread_count = migrate_decompress_threads();
-    qemu_mutex_lock(&decomp_done_lock);
+    QEMU_LOCK_GUARD(&decomp_done_lock);
     while (true) {
         for (idx = 0; idx < thread_count; idx++) {
             if (decomp_param[idx].done) {
@@ -3295,7 +3294,6 @@ static void decompress_data_with_multi_threads(QEMUFile *f,
             qemu_cond_wait(&decomp_done_cond, &decomp_done_lock);
         }
     }
-    qemu_mutex_unlock(&decomp_done_lock);
 }
 
  /*
-- 
2.30.2