summaryrefslogtreecommitdiffstats
path: root/drivers/hv
diff options
context:
space:
mode:
authorK. Y. Srinivasan <kys@microsoft.com>2017-01-19 11:51:50 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-20 14:48:03 +0100
commite810e48c0c9a1a1ebb90cfe966bce6dc80ce08e7 (patch)
tree8fbbcdd8b1297e8968c78bb5f697f058923a4401 /drivers/hv
parent73638cddaad861a5ebb2b119d8b318d4bded8f8d (diff)
downloadlinux-e810e48c0c9a1a1ebb90cfe966bce6dc80ce08e7.tar.bz2
Drivers: hv: vmbus: Move the code to signal end of message
As part of the effort to separate out architecture specific code, move the code for signaling end of message. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/channel_mgmt.c1
-rw-r--r--drivers/hv/hyperv_vmbus.h35
2 files changed, 1 insertions, 35 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 0af7e39006c8..49d77be90ca4 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -31,6 +31,7 @@
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/hyperv.h>
+#include <asm/mshyperv.h>
#include "hyperv_vmbus.h"
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index 59eb28c45ff5..e9f5d2c2fb6b 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -521,41 +521,6 @@ struct vmbus_channel_message_table_entry {
extern struct vmbus_channel_message_table_entry
channel_message_table[CHANNELMSG_COUNT];
-/* Free the message slot and signal end-of-message if required */
-static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type)
-{
- /*
- * On crash we're reading some other CPU's message page and we need
- * to be careful: this other CPU may already had cleared the header
- * and the host may already had delivered some other message there.
- * In case we blindly write msg->header.message_type we're going
- * to lose it. We can still lose a message of the same type but
- * we count on the fact that there can only be one
- * CHANNELMSG_UNLOAD_RESPONSE and we don't care about other messages
- * on crash.
- */
- if (cmpxchg(&msg->header.message_type, old_msg_type,
- HVMSG_NONE) != old_msg_type)
- return;
-
- /*
- * Make sure the write to MessageType (ie set to
- * HVMSG_NONE) happens before we read the
- * MessagePending and EOMing. Otherwise, the EOMing
- * will not deliver any more messages since there is
- * no empty slot
- */
- mb();
-
- if (msg->header.message_flags.msg_pending) {
- /*
- * This will cause message queue rescan to
- * possibly deliver another msg from the
- * hypervisor
- */
- wrmsrl(HV_X64_MSR_EOM, 0);
- }
-}
/* General vmbus interface */