linux-kernel - RE: [PATCH] X86/UAPI: Use __u64 instead of u64 in hyperv.h

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Date:   Tue, 20 Feb 2018 16:48:50 +0000
From:   KY Srinivasan <kys@...rosoft.com>
To:     KarimAllah Ahmed <karahmed@...zon.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "x86@...nel.org" <x86@...nel.org>
CC:     Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>
Subject: RE: [PATCH] X86/UAPI: Use __u64 instead of u64 in hyperv.h



> -----Original Message-----
> From: KarimAllah Ahmed <karahmed@...zon.de>
> Sent: Monday, February 19, 2018 11:40 PM
> To: linux-kernel@...r.kernel.org; devel@...uxdriverproject.org;
> x86@...nel.org
> Cc: KarimAllah Ahmed <karahmed@...zon.de>; KY Srinivasan
> <kys@...rosoft.com>; Haiyang Zhang <haiyangz@...rosoft.com>; Stephen
> Hemminger <sthemmin@...rosoft.com>; Thomas Gleixner
> <tglx@...utronix.de>; Ingo Molnar <mingo@...hat.com>; H . Peter Anvin
> <hpa@...or.com>
> Subject: [PATCH] X86/UAPI: Use __u64 instead of u64 in hyperv.h
> 
> ... since u64 has a hidden header dependency that was not there before
> using it (i.e. it breaks our VMM build). Also, __u64 is the right way to
> expose the data type through UAPI.
> 
> Fixes: 93286261 ("x86/hyperv: Reenlightenment notifications support")
> Signed-off-by: KarimAllah Ahmed <karahmed@...zon.de>
> Cc: K. Y. Srinivasan <kys@...rosoft.com>
> Cc: Haiyang Zhang <haiyangz@...rosoft.com>
> Cc: Stephen Hemminger <sthemmin@...rosoft.com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: H. Peter Anvin <hpa@...or.com>
> Cc: x86@...nel.org
> Cc: devel@...uxdriverproject.org
> Cc: linux-kernel@...r.kernel.org

Acked-by: K. Y. Srinivasan <kys@...rosoft.com>
> ---
>  arch/x86/include/uapi/asm/hyperv.h | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/x86/include/uapi/asm/hyperv.h
> b/arch/x86/include/uapi/asm/hyperv.h
> index 197c2e6..0994143 100644
> --- a/arch/x86/include/uapi/asm/hyperv.h
> +++ b/arch/x86/include/uapi/asm/hyperv.h
> @@ -241,24 +241,24 @@
>  #define HV_X64_MSR_REENLIGHTENMENT_CONTROL	0x40000106
> 
>  struct hv_reenlightenment_control {
> -	u64 vector:8;
> -	u64 reserved1:8;
> -	u64 enabled:1;
> -	u64 reserved2:15;
> -	u64 target_vp:32;
> +	__u64 vector:8;
> +	__u64 reserved1:8;
> +	__u64 enabled:1;
> +	__u64 reserved2:15;
> +	__u64 target_vp:32;
>  };
> 
>  #define HV_X64_MSR_TSC_EMULATION_CONTROL	0x40000107
>  #define HV_X64_MSR_TSC_EMULATION_STATUS		0x40000108
> 
>  struct hv_tsc_emulation_control {
> -	u64 enabled:1;
> -	u64 reserved:63;
> +	__u64 enabled:1;
> +	__u64 reserved:63;
>  };
> 
>  struct hv_tsc_emulation_status {
> -	u64 inprogress:1;
> -	u64 reserved:63;
> +	__u64 inprogress:1;
> +	__u64 reserved:63;
>  };
> 
>  #define HV_X64_MSR_HYPERCALL_ENABLE		0x00000001
> --
> 2.7.4