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Commit dfbca899 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Reject small mappings for PMB bolting. 



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: default avatarPaul Mundt <lethal@linux-sh.org>
parent 4bc277ac

arch/sh/mm/pmb.c

+2 −0
Original line number Diff line number Diff line
@@ -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))