arm64/mm: Change protval as 'pteval_t' in map_range()

pgprot_t has been defined as an encapsulated structure with pteval_t as its
element. Hence it is prudent to use pteval_t as the type instead of via the
size based u64. Besides pteval_t type might be different size later on with
FEAT_D128.

Cc: Will Deacon <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Ryan Roberts <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Anshuman Khandual <[email protected]>
Reviewed-by: Gavin Shan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>

Author: Anshuman Khandual

arch/arm64/kernel/pi/map_range.c

@@ -30,7 +30,7 @@ void __init map_range(u64 *pte, u64 start, u64 end, u64 pa, pgprot_t prot,
 		      int level, pte_t *tbl, bool may_use_cont, u64 va_offset)
 {
 	u64 cmask = (level == 3) ? CONT_PTE_SIZE - 1 : U64_MAX;
-	u64 protval = pgprot_val(prot) & ~PTE_TYPE_MASK;
+	pteval_t protval = pgprot_val(prot) & ~PTE_TYPE_MASK;
 	int lshift = (3 - level) * (PAGE_SHIFT - 3);
 	u64 lmask = (PAGE_SIZE << lshift) - 1;