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docs: filesystems: caching/backend-api.rst: fix an object withdrawn API

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There's no fscache_are_objects_withdrawn() helper at all to test if
cookie withdrawal is completed currently. The cache backend is using
fscache_wait_for_objects() to wait all objects to be withdrawn.

Signed-off-by: Yue Hu <huyue2@coolpad.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-cachefs@redhat.com
Link: https://listman.redhat.com/archives/linux-cachefs/2022-April/006705.html # v1
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Yue Hu 2022-04-07 19:02:39 +08:00 committed by David Howells
parent c54eead2a6
commit 5d3d5b9645
1 changed files with 2 additions and 2 deletions
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Documentation/filesystems/caching/backend-api.rst
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@ -110,9 +110,9 @@ to withdraw them, calling::
on the cookie that each object belongs to. This schedules the specified cookie
for withdrawal. This gets offloaded to a workqueue. The cache backend can
test for completion by calling::
wait for completion by calling::
bool fscache_are_objects_withdrawn(struct fscache_cookie *cache);
void fscache_wait_for_objects(struct fscache_cache *cache);
Once all the cookies are withdrawn, a cache backend can withdraw all the
volumes, calling::