From: David Vrabel <david.vrabel@citrix.com>
To: Jan Beulich <JBeulich@suse.com>, Juergen Gross <JGross@suse.com>
Cc: xen-devel <xen-devel@lists.xenproject.org>,
<boris.ostrovsky@oracle.com>, <david.vrabel@citrix.com>,
<linux-kernel@vger.kernel.org>
Subject: Re: [Xen-devel] [PATCH 3/3] xen: use correct type for physical addresses
Date: Fri, 9 Jan 2015 12:51:35 +0000 [thread overview]
Message-ID: <54AFCED7.7040407@citrix.com> (raw)
In-Reply-To: <54AFB410020000780005306E@mail.emea.novell.com>
On 09/01/15 09:57, Jan Beulich wrote:
>>>> On 08.01.15 at 18:01, <JGross@suse.com> wrote:
>> --- a/arch/x86/xen/setup.c
>> +++ b/arch/x86/xen/setup.c
>> @@ -140,7 +140,7 @@ static void __init xen_del_extra_mem(u64 start, u64 size)
>> unsigned long __ref xen_chk_extra_mem(unsigned long pfn)
>> {
>> int i;
>> - unsigned long addr = PFN_PHYS(pfn);
>> + u64 addr = PFN_PHYS(pfn);
>
> Isn't phys_addr_t the type to use here?
Agreed.
>> @@ -284,7 +286,7 @@ static void __init xen_update_mem_tables(unsigned long pfn, unsigned long mfn)
>> }
>>
>> /* Update kernel mapping, but not for highmem. */
>> - if ((pfn << PAGE_SHIFT) >= __pa(high_memory))
>> + if (PFN_PHYS(pfn) >= (u64)(__pa(high_memory)))
>
> I don't think you really need the cast on the right side - __pa()
> should be returning a value of suitable type (and unsigned long
> would be sufficient for anything up to and including high_memory).
I'd prefer:
if (pfn >= PFN_DOWN(__pa(high_memory))
David
next prev parent reply other threads:[~2015-01-09 12:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-08 17:01 [PATCH 0/3] xen: correct several bugs in new p2m list setup Juergen Gross
2015-01-08 17:01 ` [PATCH 1/3] xen: correct error for building p2m list on 32 bits Juergen Gross
2015-01-08 17:01 ` [PATCH 2/3] xen: correct race in alloc_p2m_pmd() Juergen Gross
2015-01-09 15:09 ` David Vrabel
2015-01-09 15:17 ` Juergen Gross
2015-01-08 17:01 ` [PATCH 3/3] xen: use correct type for physical addresses Juergen Gross
2015-01-09 9:57 ` [Xen-devel] " Jan Beulich
2015-01-09 12:51 ` David Vrabel [this message]
2015-01-09 12:56 ` Jan Beulich
2015-01-09 15:10 ` David Vrabel
2015-01-09 12:51 ` David Vrabel
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