ARM: 7067/1: mm: keep significant bits in pfn_valid

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When ARCH_HAS_HOLES_MEMORYMODEL is selected, pfn_valid calls
memblock_is_memory to test validity of a pfn:

> memblock_is_memory(pfn << PAGE_SHIFT);

On LPAE systems this cuts off the top bits, as the shift occurs before
the value is promoted to a phys_addr_t.

This patch replaces the shift with a call to __pfn_to_phys (which casts
pfn to phys_addr_t before shifting), preventing the loss of significant
bits.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Mark Rutland 2011-08-30 17:45:10 +01:00 • committed by Russell King

parent 9e79e3e9dd

commit fb492c9160

1 changed files with 1 additions and 1 deletions

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arch/arm/mm/init.c

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