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sh: Reject small mappings for PMB bolting.

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The minimum section size for the PMB is 16M, so just always error
out early if the specified size is too small. This permits us to
unconditionally call in to pmb_bolt_mapping() with variable sizes
without wasting a TLB and cache flush for the range.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2010-05-11 13:50:29 +09:00
parent 4bc277ac9c
commit dfbca89987
1 changed files with 2 additions and 0 deletions
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2
arch/sh/mm/pmb.c
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@ -341,6 +341,8 @@ int pmb_bolt_mapping(unsigned long vaddr, phys_addr_t phys,
unsigned long flags, pmb_flags;
int i, mapped;
if (size < SZ_16M)
return -EINVAL;
if (!pmb_addr_valid(vaddr, size))
return -EFAULT;
if (pmb_mapping_exists(vaddr, phys, size))