tree ddccd8f32734a46e84ee08a4b905c9855a95582f
parent 9e79e3e9dd9672b37ac9412e9a926714306551fe
author Mark Rutland <mark.rutland@arm.com> 1314722710 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1315129803 +0100

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

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>