From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH V6 2/7] perf/amd/iommu: Modify functions to query max
	banks and counters
Date: Wed, 4 Jan 2017 15:48:53 +0100
Message-ID: <20170104144853.GE10632@8bytes.org>
References: <1482500330-5606-1-git-send-email-Suravee.Suthikulpanit@amd.com>
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To: Suravee Suthikulpanit <Suravee.Suthikulpanit-5C7GfCeVMHo@public.gmane.org>
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On Fri, Dec 23, 2016 at 08:38:45PM +0700, Suravee Suthikulpanit wrote:
> --- a/arch/x86/events/amd/iommu.h
> +++ b/arch/x86/events/amd/iommu.h
> @@ -24,15 +24,12 @@
>  #define PC_MAX_SPEC_BNKS			64
>  #define PC_MAX_SPEC_CNTRS			16
>  
> -/* iommu pc reg masks*/
> -#define IOMMU_BASE_DEVID			0x0000
> -
>  /* amd_iommu_init.c external support functions */
>  extern bool amd_iommu_pc_supported(void);
>  
> -extern u8 amd_iommu_pc_get_max_banks(u16 devid);
> +extern u8 amd_iommu_pc_get_max_banks(uint devid);
>  
> -extern u8 amd_iommu_pc_get_max_counters(u16 devid);
> +extern u8 amd_iommu_pc_get_max_counters(uint devid);

The parameters are now iommu-indexes and not device-ids anymore. You
should reflect that in the prototypes here too.

> diff --git a/drivers/iommu/amd_iommu_proto.h b/drivers/iommu/amd_iommu_proto.h
> index 7eb60c1..1f10b3f 100644
> --- a/drivers/iommu/amd_iommu_proto.h
> +++ b/drivers/iommu/amd_iommu_proto.h
> @@ -58,8 +58,8 @@ extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid,
>  
>  /* IOMMU Performance Counter functions */
>  extern bool amd_iommu_pc_supported(void);
> -extern u8 amd_iommu_pc_get_max_banks(u16 devid);
> -extern u8 amd_iommu_pc_get_max_counters(u16 devid);
> +extern u8 amd_iommu_pc_get_max_banks(uint devid);
> +extern u8 amd_iommu_pc_get_max_counters(uint devid);

Same here, and why do you need to declare the prototypes in two
different header files?