riscv: mm: use __pa_symbol for kernel symbols

__pa_symbol is the marcro that should be used for kernel symbols. It is
also a pre-requisite for DEBUG_VIRTUAL which will do bounds checking.
Signed-off-by: NZong Li <zong.li@sifive.com>
Reviewed-by: NAnup Patel <anup@brainfault.org>
Signed-off-by: NPaul Walmsley <paul.walmsley@sifive.com>

arch/riscv/mm/init.c

@@ -99,13 +99,13 @@ static void __init setup_initrd(void)
 		pr_info("initrd not found or empty");
 		goto disable;
 	}
-	if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
+	if (__pa_symbol(initrd_end) > PFN_PHYS(max_low_pfn)) {
 		pr_err("initrd extends beyond end of memory");
 		goto disable;
 	}
 
 	size = initrd_end - initrd_start;
-	memblock_reserve(__pa(initrd_start), size);
+	memblock_reserve(__pa_symbol(initrd_start), size);
 	initrd_below_start_ok = 1;
 
 	pr_info("Initial ramdisk at: 0x%p (%lu bytes)\n",
@@ -124,8 +124,8 @@ void __init setup_bootmem(void)
 {
 	struct memblock_region *reg;
 	phys_addr_t mem_size = 0;
-	phys_addr_t vmlinux_end = __pa(&_end);
-	phys_addr_t vmlinux_start = __pa(&_start);
+	phys_addr_t vmlinux_end = __pa_symbol(&_end);
+	phys_addr_t vmlinux_start = __pa_symbol(&_start);
 
 	/* Find the memory region containing the kernel */
 	for_each_memblock(memory, reg) {
@@ -445,7 +445,7 @@ static void __init setup_vm_final(void)
 
 	/* Setup swapper PGD for fixmap */
 	create_pgd_mapping(swapper_pg_dir, FIXADDR_START,
-			   __pa(fixmap_pgd_next),
+			   __pa_symbol(fixmap_pgd_next),
 			   PGDIR_SIZE, PAGE_TABLE);
 
 	/* Map all memory banks */
@@ -474,7 +474,7 @@ static void __init setup_vm_final(void)
 	clear_fixmap(FIX_PMD);
 
 	/* Move to swapper page table */
-	csr_write(CSR_SATP, PFN_DOWN(__pa(swapper_pg_dir)) | SATP_MODE);
+	csr_write(CSR_SATP, PFN_DOWN(__pa_symbol(swapper_pg_dir)) | SATP_MODE);
 	local_flush_tlb_all();
 }
 #else