ARM: LPAE: use phys_addr_t in free_memmap()

The free_memmap() was mistakenly using unsigned long type to represent
physical addresses.  This breaks on PAE systems where memory could be placed
above the 32-bit addressible limit.

This patch fixes this function to properly use phys_addr_t instead.

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Subash Patel <subash.rp@samsung.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

arch/arm/mm/init.c

@@ -442,7 +442,7 @@ static inline void
 free_memmap(unsigned long start_pfn, unsigned long end_pfn)
 {
 	struct page *start_pg, *end_pg;
-	unsigned long pg, pgend;
+	phys_addr_t pg, pgend;
 
 	/*
 	 * Convert start_pfn/end_pfn to a struct page pointer.
@@ -454,8 +454,8 @@ free_memmap(unsigned long start_pfn, unsigned long end_pfn)
 	 * Convert to physical addresses, and
 	 * round start upwards and end downwards.
 	 */
-	pg = (unsigned long)PAGE_ALIGN(__pa(start_pg));
+	pg = PAGE_ALIGN(__pa(start_pg));
-	pgend = (unsigned long)__pa(end_pg) & PAGE_MASK;
+	pgend = __pa(end_pg) & PAGE_MASK;
 
 	/*
 	 * If there are free pages between these,