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Code Issues Releases Activity

hyperv/vmbus: Use atomic_testandclear

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Prepare to use unsigned long for event channel bit array.

Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D6382
This commit is contained in:
Sepherosa Ziehau 2016-05-16 08:50:32 +00:00
parent 653d2f366d
commit 81ccfbbc2e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=299927
1 changed files with 4 additions and 3 deletions
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7
sys/dev/hyperv/vmbus/hv_connection.c
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@ -33,6 +33,7 @@
#include <sys/lock.h>
#include <sys/mutex.h>
#include <machine/bus.h>
#include <machine/atomic.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
@ -313,7 +314,7 @@ hv_vmbus_on_events(int cpu)
/*
* receive size is 1/2 page and divide that by 4 bytes
*/
if (synch_test_and_clear_bit(0, &event->flags32[0])) {
if (atomic_testandclear_int(&event->flags32[0], 0)) {
recv_interrupt_page =
hv_vmbus_g_connection.recv_interrupt_page;
} else {
@ -337,8 +338,8 @@ hv_vmbus_on_events(int cpu)
continue;
for (bit = 0; bit < HV_CHANNEL_DWORD_LEN; bit++) {
if (synch_test_and_clear_bit(bit,
(uint32_t *)&recv_interrupt_page[dword])) {
if (atomic_testandclear_int(
&recv_interrupt_page[dword], bit)) {
struct hv_vmbus_channel *channel;
rel_id = (dword << 5) + bit;