linux-kernel - Re: [PATCH v2] arch/powerpc: Remove unused cede related functions

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Date: Wed, 15 May 2024 10:53:42 +0530
From: Naveen N Rao <naveen@...nel.org>
To: Gautam Menghani <gautam@...ux.ibm.com>
Cc: mpe@...erman.id.au, npiggin@...il.com, christophe.leroy@...roup.eu, 
	aboorvad@...ux.vnet.ibm.com, linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] arch/powerpc: Remove unused cede related functions

On Tue, May 14, 2024 at 06:54:55PM GMT, Gautam Menghani wrote:
> Remove extended_cede_processor() and its helpers as
> extended_cede_processor() has no callers since
> commit 48f6e7f6d948("powerpc/pseries: remove cede offline state for CPUs")
> 
> Signed-off-by: Gautam Menghani <gautam@...ux.ibm.com>
> ---
> v1 -> v2:
> 1. Remove helpers of extended_cede_processor()

Acked-by: Naveen N Rao <naveen@...nel.org>

> 
>  arch/powerpc/include/asm/plpar_wrappers.h | 28 -----------------------
>  1 file changed, 28 deletions(-)
> 
> diff --git a/arch/powerpc/include/asm/plpar_wrappers.h b/arch/powerpc/include/asm/plpar_wrappers.h
> index b3ee44a40c2f..71648c126970 100644
> --- a/arch/powerpc/include/asm/plpar_wrappers.h
> +++ b/arch/powerpc/include/asm/plpar_wrappers.h
> @@ -18,16 +18,6 @@ static inline long poll_pending(void)
>  	return plpar_hcall_norets(H_POLL_PENDING);
>  }
>  
> -static inline u8 get_cede_latency_hint(void)
> -{
> -	return get_lppaca()->cede_latency_hint;
> -}
> -
> -static inline void set_cede_latency_hint(u8 latency_hint)
> -{
> -	get_lppaca()->cede_latency_hint = latency_hint;
> -}
> -
>  static inline long cede_processor(void)
>  {
>  	/*
> @@ -37,24 +27,6 @@ static inline long cede_processor(void)
>  	return plpar_hcall_norets_notrace(H_CEDE);
>  }
>  
> -static inline long extended_cede_processor(unsigned long latency_hint)
> -{
> -	long rc;
> -	u8 old_latency_hint = get_cede_latency_hint();
> -
> -	set_cede_latency_hint(latency_hint);
> -
> -	rc = cede_processor();
> -
> -	/* Ensure that H_CEDE returns with IRQs on */
> -	if (WARN_ON(IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG) && !(mfmsr() & MSR_EE)))
> -		__hard_irq_enable();
> -
> -	set_cede_latency_hint(old_latency_hint);
> -
> -	return rc;
> -}
> -
>  static inline long vpa_call(unsigned long flags, unsigned long cpu,
>  		unsigned long vpa)
>  {
> -- 
> 2.45.0
>