Re: [PATCH] x86/Hyper-V: Fix definition HV_MAX_FLUSH_REP_COUNT

[Paolo Bonzini <pbonzini@redhat.com>]

On 22/02/19 11:48, lantianyu1986@gmail.com wrote:
> From: Lan Tianyu <Tianyu.Lan@microsoft.com>
> 
> The max flush rep count of HvFlushGuestPhysicalAddressList hypercall
> is equal with how many entries of union hv_gpa_page_range can be populated
> into the input parameter page. The origin code lacks parenthesis around
> PAGE_SIZE - 2 * sizeof(u64). This patch is to fix it.
> 
> Cc: <stable@vger.kernel.org>
> Fixs: cc4edae4b9(x86/hyper-v: Add HvFlushGuestAddressList hypercall support)
> Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
> ---
>  arch/x86/include/asm/hyperv-tlfs.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
> index 705dafc2d11a..2bdbbbcfa393 100644
> --- a/arch/x86/include/asm/hyperv-tlfs.h
> +++ b/arch/x86/include/asm/hyperv-tlfs.h
> @@ -841,7 +841,7 @@ union hv_gpa_page_range {
>   * count is equal with how many entries of union hv_gpa_page_range can
>   * be populated into the input parameter page.
>   */
> -#define HV_MAX_FLUSH_REP_COUNT (PAGE_SIZE - 2 * sizeof(u64) /	\
> +#define HV_MAX_FLUSH_REP_COUNT ((PAGE_SIZE - 2 * sizeof(u64)) /	\
>  				sizeof(union hv_gpa_page_range))
>  
>  struct hv_guest_mapping_flush_list {
> 

Queued for after he merge window, with the fixed "Fixes" tag.

Paolo