ACK: [J/linux-riscv][PATCH] UBUNTU: [Config] Disable VMAP_STACK due to CPU stalls on EFI

[Tim Gardner]

Acked-by: Tim Gardner <tim.gardner at canonical.com>

On 4/7/22 05:50, Dimitri John Ledkov wrote:
> BugLink: https://bugs.launchpad.net/bugs/1967130
> 
> When booting with EFI, VMAP_STACK causes CPU stalls. Disable this
> config option, until a fix exists that allows using VMAP_STACK
> together with EFI. VMAP_STACK on RISC-V was first added in v5.14
> kernels, thus this option has not yet shipped in any stable
> series. EFI support is new in Jammy as well.
> 
> Signed-off-by: Dimitri John Ledkov <dimitri.ledkov at canonical.com>
> ---
>   debian.riscv/config/config.common.ubuntu | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/debian.riscv/config/config.common.ubuntu b/debian.riscv/config/config.common.ubuntu
> index 2eac551e14..34a6c3f6b6 100644
> --- a/debian.riscv/config/config.common.ubuntu
> +++ b/debian.riscv/config/config.common.ubuntu
> @@ -8228,7 +8228,7 @@ CONFIG_VL6180=m
>   CONFIG_VLAN_8021Q=m
>   CONFIG_VLAN_8021Q_GVRP=y
>   CONFIG_VLAN_8021Q_MVRP=y
> -CONFIG_VMAP_STACK=y
> +# CONFIG_VMAP_STACK is not set
>   CONFIG_VME_BUS=y
>   CONFIG_VME_FAKE=m
>   CONFIG_VME_TSI148=m

-- 
-----------
Tim Gardner
Canonical, Inc