On Thu, Aug 8, 2019 at 1:30 PM Vincent Chen <vincent.c...@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.c...@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 <a...@brainfault.org>
This should be a RC fix.
Please add "Fixes:" in your commit description and
CC stable kernel.
Regards,
Anup
