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generic, x86: fix add iommu_num_pages helper function

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This IOMMU helper function doesn't work for some architectures:

  http://marc.info/?l=linux-kernel&m=121699304403202&w=2

It also breaks POWER and SPARC builds:

  http://marc.info/?l=linux-kernel&m=121730388001890&w=2

Currently, only x86 IOMMUs use this so let's move it to x86 for
now.

Reported-by: Stephen Rothwell <[email protected]>
Signed-off-by: FUJITA Tomonori <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
FUJITA Tomonori 2008-07-29 13:38:53 +09:00 • committed by Ingo Molnar
commit 8978b74253
4 changed files with 10 additions and 9 deletions
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8
lib/iommu-helper.c
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@ -80,11 +80,3 @@ void iommu_area_free(unsigned long *map, unsigned long start, unsigned int nr)
}
}
EXPORT_SYMBOL(iommu_area_free);
unsigned long iommu_num_pages(unsigned long addr, unsigned long len)
{
unsigned long size = roundup((addr & ~PAGE_MASK) + len, PAGE_SIZE);
return size >> PAGE_SHIFT;
}
EXPORT_SYMBOL(iommu_num_pages);