[PATCH] riscv: hibernation: Replace jalr with jr before suspend_restore_regs
JeeHeng Sia
jeeheng.sia at starfivetech.com
Fri May 19 03:51:01 PDT 2023
looks good to me.
Thanks
Regards
Jee Heng
> -----Original Message-----
> From: Song Shuai <suagrfillet at gmail.com>
> Sent: Friday, May 19, 2023 2:09 PM
> To: paul.walmsley at sifive.com; palmer at dabbelt.com; aou at eecs.berkeley.edu; JeeHeng Sia <jeeheng.sia at starfivetech.com>; Mason
> Huo <mason.huo at starfivetech.com>; conor.dooley at microchip.com
> Cc: linux-riscv at lists.infradead.org; linux-kernel at vger.kernel.org; Song Shuai <suagrfillet at gmail.com>
> Subject: [PATCH] riscv: hibernation: Replace jalr with jr before suspend_restore_regs
>
> No need to link the x1/ra reg via jalr before suspend_restore_regs
> So it's better to replace jalr with jr.
>
> Signed-off-by: Song Shuai <suagrfillet at gmail.com>
> ---
> arch/riscv/kernel/hibernate-asm.S | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/riscv/kernel/hibernate-asm.S b/arch/riscv/kernel/hibernate-asm.S
> index effaf5ca5da0..5c76671c7e15 100644
> --- a/arch/riscv/kernel/hibernate-asm.S
> +++ b/arch/riscv/kernel/hibernate-asm.S
> @@ -50,7 +50,7 @@ ENTRY(hibernate_restore_image)
> REG_L s4, restore_pblist
> REG_L a1, relocated_restore_code
>
> - jalr a1
> + jr a1
> END(hibernate_restore_image)
>
> /*
> @@ -73,5 +73,5 @@ ENTRY(hibernate_core_restore_code)
> REG_L s4, HIBERN_PBE_NEXT(s4)
> bnez s4, .Lcopy
>
> - jalr s2
> + jr s2
I am content with these changes, as they do not involve a return after the jump
> END(hibernate_core_restore_code)
> --
> 2.20.1
More information about the linux-riscv
mailing list