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vmbus: use kernel bitops for traversing interrupt mask

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Use standard kernel operations for find first set bit to traverse
the channel bit array. This has added benefit of speeding up
lookup on 64 bit and because it uses find first set instruction.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stephen Hemminger
2017-02-05 17:20:31 -07:00
committed by Greg Kroah-Hartman
parent bb6a4db92f
commit 5c1bec61fd
4 changed files with 29 additions and 54 deletions
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8
drivers/hv/channel.c
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@@ -47,12 +47,8 @@ void vmbus_setevent(struct vmbus_channel *channel)
* For channels marked as in "low latency" mode
* bypass the monitor page mechanism.
*/
if ((channel->offermsg.monitor_allocated) &&
(!channel->low_latency)) {
/* Each u32 represents 32 channels */
sync_set_bit(channel->offermsg.child_relid & 31,
(unsigned long *) vmbus_connection.send_int_page +
(channel->offermsg.child_relid >> 5));
if (channel->offermsg.monitor_allocated && !channel->low_latency) {
vmbus_send_interrupt(channel->offermsg.child_relid);
/* Get the child to parent monitor page */
monitorpage = vmbus_connection.monitor_pages[1];