iscsi: do not use aio_context_acquire/release
Now that all bottom halves and callbacks take care of taking the AioContext lock, we can migrate some users away from it and to a specific QemuMutex or CoMutex. Protect libiscsi calls with a QemuMutex. Callbacks are invoked using bottom halves, so we don't even have to drop it around callback invocations. Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Message-id: 20170222180725.28611-4-pbonzini@redhat.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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