diff mbox

[05/15] ARM: head: use PC-relative insn sequence for __smp_alt

Message ID 20170805205222.19868-6-ard.biesheuvel@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Ard Biesheuvel Aug. 5, 2017, 8:52 p.m. UTC
Replace the open coded PC relative offset calculations with a pair
of adr_l invocations.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 arch/arm/kernel/head.S | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

Comments

Tony Lindgren Aug. 11, 2017, 3:13 p.m. UTC | #1
* Ard Biesheuvel <ard.biesheuvel@linaro.org> [170805 13:54]:
> Replace the open coded PC relative offset calculations with a pair
> of adr_l invocations.
> 
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> ---
>  arch/arm/kernel/head.S | 12 ++----------
>  1 file changed, 2 insertions(+), 10 deletions(-)
> 
> diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
> index 6e9df3663a57..aed341e0f530 100644
> --- a/arch/arm/kernel/head.S
> +++ b/arch/arm/kernel/head.S
> @@ -523,19 +523,11 @@ ARM_BE8(rev	r0, r0)			@ byteswap if big endian
>  	retne	lr
>  
>  __fixup_smp_on_up:
> -	adr	r0, 1f
> -	ldmia	r0, {r3 - r5}
> -	sub	r3, r0, r3
> -	add	r4, r4, r3
> -	add	r5, r5, r3
> +	adr_l	r4, __smpalt_begin
> +	adr_l	r5, __smpalt_end
>  	b	__do_fixup_smp_on_up
>  ENDPROC(__fixup_smp)
>  
> -	.align
> -1:	.word	.
> -	.word	__smpalt_begin
> -	.word	__smpalt_end
> -
>  	.pushsection .data
>  	.globl	smp_on_up
>  smp_on_up:

Ard, it's this one that cause boot to fail on omap3.
The rest of your set works for me with just this one
left out.

Regards,

Tony
diff mbox

Patch

diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 6e9df3663a57..aed341e0f530 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -523,19 +523,11 @@  ARM_BE8(rev	r0, r0)			@ byteswap if big endian
 	retne	lr
 
 __fixup_smp_on_up:
-	adr	r0, 1f
-	ldmia	r0, {r3 - r5}
-	sub	r3, r0, r3
-	add	r4, r4, r3
-	add	r5, r5, r3
+	adr_l	r4, __smpalt_begin
+	adr_l	r5, __smpalt_end
 	b	__do_fixup_smp_on_up
 ENDPROC(__fixup_smp)
 
-	.align
-1:	.word	.
-	.word	__smpalt_begin
-	.word	__smpalt_end
-
 	.pushsection .data
 	.globl	smp_on_up
 smp_on_up: