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async: Remove AsyncContext

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The purpose of AsyncContexts was to protect qcow and qcow2 against reentrancy
during an emulated bdrv_read/write (which includes a qemu_aio_wait() call and
can run AIO callbacks of different requests if it weren't for AsyncContexts).

Now both qcow and qcow2 are protected by CoMutexes and AsyncContexts can be
removed.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2011-07-15 16:36:40 +02:00
parent 52b8eb6013
commit 384acbf46b
7 changed files with 11 additions and 169 deletions
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4
qemu-common.h
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@ -115,10 +115,6 @@ int qemu_main(int argc, char **argv, char **envp);
/* bottom halves */
typedef void QEMUBHFunc(void *opaque);
void async_context_push(void);
void async_context_pop(void);
int get_async_context_id(void);
QEMUBH *qemu_bh_new(QEMUBHFunc *cb, void *opaque);
void qemu_bh_schedule(QEMUBH *bh);
/* Bottom halfs that are scheduled from a bottom half handler are instantly