Messages in this thread | | | Date | Tue, 06 Nov 2012 12:41:33 -0500 (EST) | Subject | Re: [PATCH 15/16] mm: use vm_unmapped_area() on sparc32 architecture | From | David Miller <> |
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From: Rik van Riel <riel@redhat.com> Date: Tue, 06 Nov 2012 02:30:07 -0500
> On 11/05/2012 08:25 PM, David Miller wrote: >> From: Michel Lespinasse <walken@google.com> >> Date: Mon, 5 Nov 2012 14:47:12 -0800 >> >>> Update the sparc32 arch_get_unmapped_area function to make use of >>> vm_unmapped_area() instead of implementing a brute force search. >>> >>> Signed-off-by: Michel Lespinasse <walken@google.com> >> >> Hmmm... >> >>> - if (flags & MAP_SHARED) >>> - addr = COLOUR_ALIGN(addr); >>> - else >>> - addr = PAGE_ALIGN(addr); >> >> What part of vm_unmapped_area() is going to duplicate this special >> aligning logic we need on sparc? >> > > That would be this part: > > +found: > + /* We found a suitable gap. Clip it with the original low_limit. */ > + if (gap_start < info->low_limit) > + gap_start = info->low_limit; > + > + /* Adjust gap address to the desired alignment */ > + gap_start += (info->align_offset - gap_start) & info->align_mask; > + > + VM_BUG_ON(gap_start + info->length > info->high_limit); > + VM_BUG_ON(gap_start + info->length > gap_end); > + return gap_start; > +}
Ok, now I understand. Works for me:
Acked-by: David S. Miller <davem@davemloft.net>
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