* [PATCH v2] ARM: OMAP2+: Add CFI type for omap4_finish_suspend
@ 2026-05-22 23:30 Mithil Bavishi
2026-05-23 1:17 ` Nathan Chancellor
0 siblings, 1 reply; 2+ messages in thread
From: Mithil Bavishi @ 2026-05-22 23:30 UTC (permalink / raw)
To: Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros,
Tony Lindgren, Russell King
Cc: Sami Tolvanen, Kees Cook, Nathan Chancellor, linux-arm-kernel,
linux-omap, llvm, linux-kernel, Mithil Bavishi
With CONFIG_CFI enabled, OMAP4 can trap in omap4_enter_lowpower()
because omap_pm_ops.finish_suspend points directly to the assembly
routine omap4_finish_suspend, which lacks the expected KCFI type
metadata.
Annotate omap4_finish_suspend with SYM_TYPED_FUNC_START so the assembly
routine carries the KCFI type metadata.
Signed-off-by: Mithil Bavishi <bavishimithil@gmail.com>
---
arch/arm/mach-omap2/sleep44xx.S | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/sleep44xx.S b/arch/arm/mach-omap2/sleep44xx.S
index f09c91978..0b48df6fc 100644
--- a/arch/arm/mach-omap2/sleep44xx.S
+++ b/arch/arm/mach-omap2/sleep44xx.S
@@ -58,7 +58,7 @@
* stack frame and it expects the caller to take care of it. Hence the entire
* stack frame is saved to avoid possible stack corruption.
*/
-ENTRY(omap4_finish_suspend)
+SYM_TYPED_FUNC_START(omap4_finish_suspend)
stmfd sp!, {r4-r12, lr}
cmp r0, #0x0
beq do_WFI @ No lowpower state, jump to WFI
@@ -223,7 +223,7 @@ skip_scu_gp_clear:
isb
dsb
ldmfd sp!, {r4-r12, pc}
-ENDPROC(omap4_finish_suspend)
+SYM_FUNC_END(omap4_finish_suspend)
/*
* ============================
--
2.43.0
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH v2] ARM: OMAP2+: Add CFI type for omap4_finish_suspend
2026-05-22 23:30 [PATCH v2] ARM: OMAP2+: Add CFI type for omap4_finish_suspend Mithil Bavishi
@ 2026-05-23 1:17 ` Nathan Chancellor
0 siblings, 0 replies; 2+ messages in thread
From: Nathan Chancellor @ 2026-05-23 1:17 UTC (permalink / raw)
To: Mithil Bavishi
Cc: Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros,
Tony Lindgren, Russell King, Sami Tolvanen, Kees Cook,
linux-arm-kernel, linux-omap, llvm, linux-kernel
On Fri, May 22, 2026 at 04:30:36PM -0700, Mithil Bavishi wrote:
> With CONFIG_CFI enabled, OMAP4 can trap in omap4_enter_lowpower()
> because omap_pm_ops.finish_suspend points directly to the assembly
> routine omap4_finish_suspend, which lacks the expected KCFI type
> metadata.
>
> Annotate omap4_finish_suspend with SYM_TYPED_FUNC_START so the assembly
> routine carries the KCFI type metadata.
>
> Signed-off-by: Mithil Bavishi <bavishimithil@gmail.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
> ---
> arch/arm/mach-omap2/sleep44xx.S | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/sleep44xx.S b/arch/arm/mach-omap2/sleep44xx.S
> index f09c91978..0b48df6fc 100644
> --- a/arch/arm/mach-omap2/sleep44xx.S
> +++ b/arch/arm/mach-omap2/sleep44xx.S
> @@ -58,7 +58,7 @@
> * stack frame and it expects the caller to take care of it. Hence the entire
> * stack frame is saved to avoid possible stack corruption.
> */
> -ENTRY(omap4_finish_suspend)
> +SYM_TYPED_FUNC_START(omap4_finish_suspend)
> stmfd sp!, {r4-r12, lr}
> cmp r0, #0x0
> beq do_WFI @ No lowpower state, jump to WFI
> @@ -223,7 +223,7 @@ skip_scu_gp_clear:
> isb
> dsb
> ldmfd sp!, {r4-r12, pc}
> -ENDPROC(omap4_finish_suspend)
> +SYM_FUNC_END(omap4_finish_suspend)
>
> /*
> * ============================
> --
> 2.43.0
>
--
Cheers,
Nathan
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