From: Rik van Riel <riel@xxxxxxxxxx> Date: Tue, 06 Nov 2012 02:30:07 -0500 > On 11/05/2012 08:25 PM, David Miller wrote: >> From: Michel Lespinasse <walken@xxxxxxxxxx> >> 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@xxxxxxxxxx> >> >> 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@xxxxxxxxxxxxx>
