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coroutine: move entry argument to qemu_coroutine_create

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In practice the entry argument is always known at creation time, and
it is confusing that sometimes qemu_coroutine_enter is used with a
non-NULL argument to re-enter a coroutine (this happens in
block/sheepdog.c and tests/test-coroutine.c).  So pass the opaque value
at creation time, for consistency with e.g. aio_bh_new.

Mostly done with the following semantic patch:

@ entry1 @
expression entry, arg, co;
@@
- co = qemu_coroutine_create(entry);
+ co = qemu_coroutine_create(entry, arg);
  ...
- qemu_coroutine_enter(co, arg);
+ qemu_coroutine_enter(co);

@ entry2 @
expression entry, arg;
identifier co;
@@
- Coroutine *co = qemu_coroutine_create(entry);
+ Coroutine *co = qemu_coroutine_create(entry, arg);
  ...
- qemu_coroutine_enter(co, arg);
+ qemu_coroutine_enter(co);

@ entry3 @
expression entry, arg;
@@
- qemu_coroutine_enter(qemu_coroutine_create(entry), arg);
+ qemu_coroutine_enter(qemu_coroutine_create(entry, arg));

@ reentry @
expression co;
@@
- qemu_coroutine_enter(co, NULL);
+ qemu_coroutine_enter(co);

except for the aforementioned few places where the semantic patch
stumbled (as expected) and for test_co_queue, which would otherwise
produce an uninitialized variable warning.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-07-04 19:10:01 +02:00 • committed by Kevin Wolf
parent 7e70cdba9f
commit 0b8b8753e4
37 changed files with 130 additions and 131 deletions
Download patch file Download diff file Expand all files Collapse all files

8
block/block-backend.c
View file

@ -836,8 +836,8 @@ static int blk_prw(BlockBackend *blk, int64_t offset, uint8_t *buf,
.ret = NOT_DONE,
};
co = qemu_coroutine_create(co_entry);
qemu_coroutine_enter(co, &rwco);
co = qemu_coroutine_create(co_entry, &rwco);
qemu_coroutine_enter(co);
aio_context = blk_get_aio_context(blk);
while (rwco.ret == NOT_DONE) {
@ -950,8 +950,8 @@ static BlockAIOCB *blk_aio_prwv(BlockBackend *blk, int64_t offset, int bytes,
acb->bh = NULL;
acb->has_returned = false;
co = qemu_coroutine_create(co_entry);
qemu_coroutine_enter(co, acb);
co = qemu_coroutine_create(co_entry, acb);
qemu_coroutine_enter(co);
acb->has_returned = true;
if (acb->rwco.ret != NOT_DONE) {