kvm tools: Use more readable name for ioport mutex

This patch renames the mutex in iport.c to 'ioport_mutex' and documents which
data it is used to protect.

Signed-off-by: Pekka Enberg <penberg@kernel.org>

diff --git a/tools/kvm/ioport.c b/tools/kvm/ioport.c
index 492ce1642ae157f8526b1eb7802ccd686ed6f43e..d0a1aa8655f7eebb58afaefbc7983688b3b1110d 100644 (file)
--- a/tools/kvm/ioport.c
+++ b/tools/kvm/ioport.c
@@ -17,19 +17,21 @@
 
 #define ioport_node(n) rb_entry(n, struct ioport, node)
 
-static u16 free_io_port_idx;
-DEFINE_MUTEX(free_io_port_idx_lock);
-static struct rb_root ioport_tree = RB_ROOT;
-bool ioport_debug;
+DEFINE_MUTEX(ioport_mutex);
+
+static u16                     free_io_port_idx; /* protected by ioport_mutex */
+
+static struct rb_root          ioport_tree = RB_ROOT;
+bool                           ioport_debug;
 
 static u16 ioport__find_free_port(void)
 {
        u16 free_port;
 
-       mutex_lock(&free_io_port_idx_lock);
+       mutex_lock(&ioport_mutex);
        free_port = IOPORT_START + free_io_port_idx * IOPORT_SIZE;
        free_io_port_idx++;
-       mutex_unlock(&free_io_port_idx_lock);
+       mutex_unlock(&ioport_mutex);
 
        return free_port;
 }