2023-06-29 19:06:06

by Sasha Levin

Subject: [PATCH AUTOSEL 6.3 07/17] arm64/hyperv: Use CPUHP_AP_HYPERV_ONLINE state to fix CPU online sequencing

From: Michael Kelley <[email protected]>

[ Upstream commit 52ae076c3a9b366b6fa9f7c7e67aed8b28716ed9 ]

State CPUHP_AP_HYPERV_ONLINE has been introduced to correctly sequence the
initialization of hyperv_pcpu_input_arg. Use this new state for Hyper-V
initialization so that hyperv_pcpu_input_arg is allocated early enough.

Signed-off-by: Michael Kelley <[email protected]>
Reviewed-by: Dexuan Cui <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Wei Liu <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
arch/arm64/hyperv/mshyperv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c
index a406454578f07..f1b8a04ee9f26 100644
--- a/arch/arm64/hyperv/mshyperv.c
+++ b/arch/arm64/hyperv/mshyperv.c
@@ -67,7 +67,7 @@ static int __init hyperv_init(void)
if (ret)
return ret;

- ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "arm64/hyperv_init:online",
+ ret = cpuhp_setup_state(CPUHP_AP_HYPERV_ONLINE, "arm64/hyperv_init:online",
hv_common_cpu_init, hv_common_cpu_die);
if (ret < 0) {
hv_common_free();
--
2.39.2

2023-06-29 22:25:26

by Michael Kelley (LINUX)

Subject: RE: [PATCH AUTOSEL 6.3 07/17] arm64/hyperv: Use CPUHP_AP_HYPERV_ONLINE state to fix CPU online sequencing

From: Sasha Levin <[email protected]> Sent: Thursday, June 29, 2023 12:01 PM
>
> From: Michael Kelley <[email protected]>
>
> [ Upstream commit 52ae076c3a9b366b6fa9f7c7e67aed8b28716ed9 ]
>
> State CPUHP_AP_HYPERV_ONLINE has been introduced to correctly sequence the
> initialization of hyperv_pcpu_input_arg. Use this new state for Hyper-V
> initialization so that hyperv_pcpu_input_arg is allocated early enough.
>

State CPUHP_AP_HYPERV_ONLINE was introduced in 6.4. There's no need
to backport this patch to stable releases.

Michael