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Drivers: hv: util: Make hv_poll_channel() a little more efficient 

The current code unconditionally sends an IPI. If we are running on the
correct CPU and are in interrupt level, we don't need an IPI.
Make this adjustment.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan 2017-04-30 16:21:17 -07:00 committed by Greg Kroah-Hartman
parent 48f4ccdfc4
commit 1e052a16eb
1 changed files with 4 additions and 0 deletions
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4
drivers/hv/hyperv_vmbus.h
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@ -411,6 +411,10 @@ static inline void hv_poll_channel(struct vmbus_channel *channel,
if (!channel)
return;
if (in_interrupt() && (channel->target_cpu == smp_processor_id())) {
cb(channel);
return;
}
smp_call_function_single(channel->target_cpu, cb, channel, true);
}