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linuxkpi: Add a few wait_bit functions

Description

linuxkpi: Add a few wait_bit functions

The linux function does a lot more than that as multiple waitqueue could be fetch
from a static table based on the hash of the argument but since in DRM it's only used
in one place just add a single variable.
We will probably need to change that in the futur but it's ok with DRM even with current
linux.

Reviewed by: hselasky
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26054

Details

Provenance
manuAuthored on Aug 14 2020, 8:48 AM
Parents
rG967fbfd9e2b7: Properly disable LUA_USE_DLOPEN for bootstrap flua
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