commit d805d8a2c70d73fc5a1f29b70296e74a012e865b
author Stefan Hajnoczi <stefanha@redhat.com> Thu Mar 09 14:08:52 2023 -0500
committer Kevin Wolf <kwolf@redhat.com> Tue Apr 25 13:17:28 2023 +0200
tree 721ff4d2901bdbacec30ab50e2d0355eae94ec8d
parent e5568a6603073884fb66e71bd133f082de763af9

block: convert bdrv_graph_wrlock() to AIO_WAIT_WHILE_UNLOCKED()

The following conversion is safe and does not change behavior:

     GLOBAL_STATE_CODE();
     ...
  -  AIO_WAIT_WHILE(qemu_get_aio_context(), ...);
  +  AIO_WAIT_WHILE_UNLOCKED(NULL, ...);

Since we're in GLOBAL_STATE_CODE(), qemu_get_aio_context() is our home
thread's AioContext. Thus AIO_WAIT_WHILE() does not unlock the
AioContext:

  if (ctx_ && in_aio_context_home_thread(ctx_)) {                \
      while ((cond)) {                                           \
          aio_poll(ctx_, true);                                  \
          waited_ = true;                                        \
      }                                                          \

And that means AIO_WAIT_WHILE_UNLOCKED(NULL, ...) can be substituted.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230309190855.414275-4-stefanha@redhat.com>
Reviewed-by: Wilfred Mallawa <wilfred.mallawa@wdc.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>