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;
+}
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