Re: FAILED: patch "[PATCH] riscv: Ensure isa-ext static keys are writable" failed to apply to 5.19-stable tree

[<Conor.Dooley@microchip.com>]

Hey Greg,
On 21/08/2022 14:43, gregkh@linuxfoundation.org wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> The patch below does not apply to the 5.19-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>.

I don't think this needs backporting. The original/fixed commit only
showed up in Palmer's first "5.20" PR & is a feature addition:
https://lore.kernel.org/linux-riscv/mhng-1cbba637-6dd2-456a-859b-9d3f8be6bab7@palmer-mbp2014/
Thanks,
Conor.

> 
> thanks,
> 
> greg k-h
> 
> ------------------ original commit in Linus's tree ------------------
> 
> From eb6354e116305afbfde196be5120bfa8669fdc6a Mon Sep 17 00:00:00 2001
> From: Andrew Jones <ajones@ventanamicro.com>
> Date: Tue, 16 Aug 2022 18:30:58 +0200
> Subject: [PATCH] riscv: Ensure isa-ext static keys are writable
> 
> riscv_isa_ext_keys[] is an array of static keys used in the unified
> ISA extension framework. The keys added to this array may be used
> anywhere, including in modules. Ensure the keys remain writable by
> placing them in the data section.
> 
> The need to change riscv_isa_ext_keys[]'s section was found when the
> kvm module started failing to load. Commit 8eb060e10185 ("arch/riscv:
> add Zihintpause support") adds a static branch check for a newly
> added isa-ext key to cpu_relax(), which kvm uses.
> 
> Fixes: c360cbec3511 ("riscv: introduce unified static key mechanism for ISA extensions")
> Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
> Cc: stable@vger.kernel.org
> Reported-by: Ron Economos <re@w6rz.net>
> Reported-by: Anup Patel <apatel@ventanamicro.com>
> Reported-by: Conor Dooley <conor.dooley@microchip.com>
> Tested-by: Atish Patra <atishp@rivosinc.com>
> Link: https://lore.kernel.org/r/20220816163058.3004536-1-ajones@ventanamicro.com
> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
> 
> diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
> index 553d755483ed..3b5583db9d80 100644
> --- a/arch/riscv/kernel/cpufeature.c
> +++ b/arch/riscv/kernel/cpufeature.c
> @@ -28,7 +28,7 @@ unsigned long elf_hwcap __read_mostly;
>  /* Host ISA bitmap */
>  static DECLARE_BITMAP(riscv_isa, RISCV_ISA_EXT_MAX) __read_mostly;
> 
> -__ro_after_init DEFINE_STATIC_KEY_ARRAY_FALSE(riscv_isa_ext_keys, RISCV_ISA_EXT_KEY_MAX);
> +DEFINE_STATIC_KEY_ARRAY_FALSE(riscv_isa_ext_keys, RISCV_ISA_EXT_KEY_MAX);
>  EXPORT_SYMBOL(riscv_isa_ext_keys);
> 
>  /**
>