riscv/mm: Use BUG_ON instead of if condition followed by BUG.

BUG_ON() uses unlikely in if(), which can be optimized at compile time.

Signed-off-by: zhouchuangao <[email protected]>
Signed-off-by: Palmer Dabbelt <[email protected]>

Author: zhouchuangao

arch/riscv/mm/init.c

@@ -232,8 +232,8 @@ static phys_addr_t alloc_pte_late(uintptr_t va)
 	unsigned long vaddr;
 
 	vaddr = __get_free_page(GFP_KERNEL);
-	if (!vaddr || !pgtable_pte_page_ctor(virt_to_page(vaddr)))
-		BUG();
+	BUG_ON(!vaddr || !pgtable_pte_page_ctor(virt_to_page(vaddr)));
+
 	return __pa(vaddr);
 }