From: Vitaly Kuznetsov <[email protected]> Message header is modified by the hypervisor and we read it in a loop, we need to prevent compilers from optimizing accesses. There are no such optimizations at this moment, this is just a future proof.
Suggested-by: Radim Krcmar <[email protected]> Signed-off-by: Vitaly Kuznetsov <[email protected]> Reviewed-by: Radim Kr.má<[email protected]> Signed-off-by: K. Y. Srinivasan <[email protected]> --- drivers/hv/channel_mgmt.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index 73a17be..38b682ba 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -605,7 +605,7 @@ static void vmbus_wait_for_unload(void) bool unloaded = false; while (1) { - if (msg->header.message_type == HVMSG_NONE) { + if (READ_ONCE(msg->header.message_type) == HVMSG_NONE) { mdelay(10); continue; } -- 1.7.4.1 _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
