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| author |   David Woodhouse <dwmw@amazon.co.uk> | 2020-10-27 13:55:21 +0000 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2020-11-15 09:49:10 -0500 |
| commit | 28f1326710555bbe666f64452d08f2d7dd657cae (patch) | |
| tree | 0500d5c7ff66eda5051b0221b04c73b28c8d8942 /tools/perf/scripts/python | |
| parent | kvm/eventfd: Use priority waitqueue to catch events before userspace (diff) | |
| download | linux-dev-28f1326710555bbe666f64452d08f2d7dd657cae.tar.xz linux-dev-28f1326710555bbe666f64452d08f2d7dd657cae.zip | |
eventfd: Export eventfd_ctx_do_read()
Where events are consumed in the kernel, for example by KVM's
irqfd_wakeup() and VFIO's virqfd_wakeup(), they currently lack a
mechanism to drain the eventfd's counter.
Since the wait queue is already locked while the wakeup functions are
invoked, all they really need to do is call eventfd_ctx_do_read().
Add a check for the lock, and export it for them.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20201027135523.646811-2-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions