On Mon, Mar 30, 2020 at 02:14:18PM +0200, gregkh@linuxfoundation.org wrote:
The patch below does not apply to the 5.5-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 749da8ca978f19710aba496208c480ad42d37f79 Mon Sep 17 00:00:00 2001 From: Yubo Xie yuboxie@microsoft.com Date: Thu, 26 Mar 2020 19:11:59 -0700 Subject: [PATCH] clocksource/drivers/hyper-v: Make sched clock return nanoseconds correctly
The sched clock read functions return the HV clock (100ns granularity) without converting it to nanoseconds.
Add the missing conversion.
Fixes: bd00cd52d5be ("clocksource/drivers/hyperv: Add Hyper-V specific sched clock function") Signed-off-by: Yubo Xie yuboxie@microsoft.com Signed-off-by: Tianyu Lan Tianyu.Lan@microsoft.com Signed-off-by: Thomas Gleixner tglx@linutronix.de Reviewed-by: Vitaly Kuznetsov vkuznets@redhat.com Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20200327021159.31429-1-Tianyu.Lan@microsoft.com
We don't have 0af3e137c144 ("clocksource/drivers/hyper-v: Untangle stimers and timesync from clocksources") on 5.5 and older. I've adjusted this patch and queued it for 5.5 and 5.4.