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| author | Olaf Hering <olaf@aepfle.de> | 2011-03-21 14:41:37 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-04-04 21:33:25 -0700 |
| commit | 22356585712d1ff08fbfed152edd8b386873b238 (patch) | |
| tree | aeb0a6192077d4865d06f6b35cdbf789b390ca99 /drivers/staging/hv/channel.c | |
| parent | 75e4fb221babbe329c1aba8c34092d29034f1545 (diff) | |
| download | op-kernel-dev-22356585712d1ff08fbfed152edd8b386873b238.zip op-kernel-dev-22356585712d1ff08fbfed152edd8b386873b238.tar.gz | |
staging: hv: use sync_bitops when interacting with the hypervisor
Locking is required when tweaking bits located in a shared page, use the
sync_ version of bitops. Without this change vmbus_on_event() will miss
events and as a result, vmbus_isr() will not schedule the receive tasklet.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Cc: stable <stable@kernel.org>
Acked-by: Haiyang Zhang <haiyangz@microsoft.com>
Acked-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/hv/channel.c')
| -rw-r--r-- | drivers/staging/hv/channel.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/staging/hv/channel.c b/drivers/staging/hv/channel.c index 775a52a..f7ce7d2 100644 --- a/drivers/staging/hv/channel.c +++ b/drivers/staging/hv/channel.c @@ -81,14 +81,14 @@ static void vmbus_setevent(struct vmbus_channel *channel) if (channel->offermsg.monitor_allocated) { /* Each u32 represents 32 channels */ - set_bit(channel->offermsg.child_relid & 31, + sync_set_bit(channel->offermsg.child_relid & 31, (unsigned long *) vmbus_connection.send_int_page + (channel->offermsg.child_relid >> 5)); monitorpage = vmbus_connection.monitor_pages; monitorpage++; /* Get the child to parent monitor page */ - set_bit(channel->monitor_bit, + sync_set_bit(channel->monitor_bit, (unsigned long *)&monitorpage->trigger_group [channel->monitor_grp].pending); @@ -104,7 +104,7 @@ static void VmbusChannelClearEvent(struct vmbus_channel *channel) if (Channel->offermsg.monitor_allocated) { /* Each u32 represents 32 channels */ - clear_bit(Channel->offermsg.child_relid & 31, + sync_clear_bit(Channel->offermsg.child_relid & 31, (unsigned long *)vmbus_connection.send_int_page + (Channel->offermsg.child_relid >> 5)); @@ -112,7 +112,7 @@ static void VmbusChannelClearEvent(struct vmbus_channel *channel) vmbus_connection.monitor_pages; monitorPage++; /* Get the child to parent monitor page */ - clear_bit(Channel->monitor_bit, + sync_clear_bit(Channel->monitor_bit, (unsigned long *)&monitorPage->trigger_group [Channel->monitor_grp].Pending); } |
