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aio-wait: draw equivalence between AIO_WAIT_WHILE() and AIO_WAIT_WHILE_UNLOCKED() 

Now that the AioContext lock no longer exists, AIO_WAIT_WHILE() and
AIO_WAIT_WHILE_UNLOCKED() are equivalent.

A future patch will get rid of AIO_WAIT_WHILE_UNLOCKED().

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-ID: <20231205182011.1976568-10-stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
master
Stefan Hajnoczi 2023-12-05 13:20:06 -05:00 committed by Kevin Wolf
parent 4f36b13847
commit 95bbddf9ad
1 changed files with 4 additions and 12 deletions
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16
include/block/aio-wait.h
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@ -63,9 +63,6 @@ extern AioWait global_aio_wait;
* @ctx: the aio context, or NULL if multiple aio contexts (for which the
* caller does not hold a lock) are involved in the polling condition.
* @cond: wait while this conditional expression is true
* @unlock: whether to unlock and then lock again @ctx. This applies
* only when waiting for another AioContext from the main loop.
* Otherwise it's ignored.
*
* Wait while a condition is true. Use this to implement synchronous
* operations that require event loop activity.
@ -78,7 +75,7 @@ extern AioWait global_aio_wait;
* wait on conditions between two IOThreads since that could lead to deadlock,
* go via the main loop instead.
*/
#define AIO_WAIT_WHILE_INTERNAL(ctx, cond, unlock) ({ \
#define AIO_WAIT_WHILE_INTERNAL(ctx, cond) ({ \
bool waited_ = false; \
AioWait *wait_ = &global_aio_wait; \
AioContext *ctx_ = (ctx); \
@ -95,13 +92,7 @@ extern AioWait global_aio_wait;
assert(qemu_get_current_aio_context() == \
qemu_get_aio_context()); \
while ((cond)) { \
if (unlock && ctx_) { \
aio_context_release(ctx_); \
} \
aio_poll(qemu_get_aio_context(), true); \
if (unlock && ctx_) { \
aio_context_acquire(ctx_); \
} \
waited_ = true; \
} \
} \
@ -109,10 +100,11 @@ extern AioWait global_aio_wait;
waited_; })
#define AIO_WAIT_WHILE(ctx, cond) \
AIO_WAIT_WHILE_INTERNAL(ctx, cond, true)
AIO_WAIT_WHILE_INTERNAL(ctx, cond)
/* TODO replace this with AIO_WAIT_WHILE() in a future patch */
#define AIO_WAIT_WHILE_UNLOCKED(ctx, cond) \
AIO_WAIT_WHILE_INTERNAL(ctx, cond, false)
AIO_WAIT_WHILE_INTERNAL(ctx, cond)
/**
* aio_wait_kick: