From: Anup Patel <anup@brainfault.org>
To: Vincent Chen <vincent.chen@sifive.com>
Cc: linux-riscv <linux-riscv@lists.infradead.org>,
Palmer Dabbelt <palmer@sifive.com>,
"linux-kernel@vger.kernel.org List"
<linux-kernel@vger.kernel.org>, Albert Ou <aou@eecs.berkeley.edu>,
Paul Walmsley <paul.walmsley@sifive.com>
Subject: Re: [PATCH 2/2] riscv: Make __fstate_clean() can work correctly.
Date: Thu, 8 Aug 2019 15:47:26 +0530 [thread overview]
Message-ID: <CAAhSdy0+FeZecT0Xppwq+fGu-BV7dp+zY141R73=0O=khKdOKQ@mail.gmail.com> (raw)
In-Reply-To: <1565251121-28490-3-git-send-email-vincent.chen@sifive.com>
On Thu, Aug 8, 2019 at 1:30 PM Vincent Chen <vincent.chen@sifive.com> wrote:
>
> Make the __fstate_clean() function can correctly set the
> state of sstatus.FS in pt_regs to SR_FS_CLEAN.
>
> Tested on both QEMU and HiFive Unleashed using BBL + Linux.
>
> Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
> ---
> arch/riscv/include/asm/switch_to.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/riscv/include/asm/switch_to.h b/arch/riscv/include/asm/switch_to.h
> index d5fe573..544f99a 100644
> --- a/arch/riscv/include/asm/switch_to.h
> +++ b/arch/riscv/include/asm/switch_to.h
> @@ -16,7 +16,7 @@ extern void __fstate_restore(struct task_struct *restore_from);
>
> static inline void __fstate_clean(struct pt_regs *regs)
> {
> - regs->sstatus |= (regs->sstatus & ~(SR_FS)) | SR_FS_CLEAN;
> + regs->sstatus = (regs->sstatus & ~(SR_FS)) | SR_FS_CLEAN;
> }
>
> static inline void fstate_off(struct task_struct *task,
> --
> 2.7.4
>
Looks good to me.
Reviewed-by: Anup Patel <anup@brainfault.org>
This should be a RC fix.
Please add "Fixes:" in your commit description and
CC stable kernel.
Regards,
Anup
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next prev parent reply other threads:[~2019-08-08 10:17 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-08 7:58 [PATCH 0/2] riscv: Correct the initialized flow of FP and __fstate_clean() Vincent Chen
2019-08-08 7:58 ` [PATCH 1/2] riscv: Correct the initialized flow of FP register Vincent Chen
2019-08-08 10:15 ` Anup Patel
2019-08-08 15:50 ` Paul Walmsley
2019-08-14 1:45 ` Vincent Chen
2019-08-14 3:51 ` Anup Patel
2019-08-12 14:58 ` Christoph Hellwig
2019-08-14 1:52 ` Vincent Chen
2019-08-08 7:58 ` [PATCH 2/2] riscv: Make __fstate_clean() can work correctly Vincent Chen
2019-08-08 10:17 ` Anup Patel [this message]
2019-08-14 1:55 ` Vincent Chen
2019-08-12 14:59 ` Christoph Hellwig
2019-08-14 1:55 ` Vincent Chen
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