Re: [Xen-devel] [PATCH v2 1/2] XEN, X86: Improve semantic support for pagetable_reserve PVOPS

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Wed, 15 Aug 2012, Attilio Rao wrote:
> On 15/08/12 18:46, Stefano Stabellini wrote:
> > On Wed, 15 Aug 2012, Attilio Rao wrote:
> >    
> >> On 15/08/12 18:25, Stefano Stabellini wrote:
> >>      
> >>> On Tue, 14 Aug 2012, Attilio Rao wrote:
> >>>
> >>>        
> >>>> - Allow xen_mapping_pagetable_reserve() to handle a start different from
> >>>>     pgt_buf_start, but still bigger than it.
> >>>> - Add checks to xen_mapping_pagetable_reserve() and 
> >>>> native_pagetable_reserve()
> >>>>     for verifying start and end are contained in the range
> >>>>     [pgt_buf_start, pgt_buf_top].
> >>>> - In xen_mapping_pagetable_reserve(), change printk into pr_debug.
> >>>> - In xen_mapping_pagetable_reserve(), print out diagnostic only if there 
> >>>> is
> >>>>     an actual need to do that (or, in other words, if there are actually 
> >>>> some
> >>>>     pages going to switch from RO to RW).
> >>>>
> >>>> Signed-off-by: Attilio Rao<attilio.rao@xxxxxxxxxx>
> >>>> ---
> >>>>    arch/x86/mm/init.c |    4 ++++
> >>>>    arch/x86/xen/mmu.c |   22 ++++++++++++++++++++--
> >>>>    2 files changed, 24 insertions(+), 2 deletions(-)
> >>>>
> >>>> diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
> >>>> index e0e6990..c5849b6 100644
> >>>> --- a/arch/x86/mm/init.c
> >>>> +++ b/arch/x86/mm/init.c
> >>>> @@ -92,6 +92,10 @@ static void __init find_early_table_space(struct 
> >>>> map_range *mr, unsigned long en
> >>>>
> >>>>    void __init native_pagetable_reserve(u64 start, u64 end)
> >>>>    {
> >>>> +        if (start<   PFN_PHYS(pgt_buf_start) || end>   
> >>>> PFN_PHYS(pgt_buf_top))
> >>>> +                panic("Invalid address range: [%llu - %llu] should be a 
> >>>> subset of [%llu - %llu]\n"
> >>>>
> >>>>          
> >>> code style (you can check whether your patch breaks the code style with
> >>> scripts/checkpatch.pl)
> >>>
> >>>        
> >> I actually did before to submit, it reported 0 errors/warning.
> >>      
> > strange, that really looks like a line over 80 chars
> >
> >    
> 
> Actually code style explicitely says to not break strings because they 
> want to retain the ability to grep. In FreeBSD this is the same and I 
> think this is why checkpatch doesn't whine. I don't think there is a bug 
> here.
> 
> Can I submit the patch as it is, then?

it is ok for me

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