riscv: add __init section marker to some functions

They are not needed after booting, so mark them as __init to move them
to the __init section.
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

arch/riscv/kernel/traps.c

@@ -195,6 +195,6 @@ int is_valid_bugaddr(unsigned long pc)
 #endif /* CONFIG_GENERIC_BUG */
 
 /* stvec & scratch is already set from head.S */
-void trap_init(void)
+void __init trap_init(void)
 {
 }

arch/riscv/mm/init.c

@@ -60,7 +60,7 @@ static void __init zone_sizes_init(void)
 	free_area_init(max_zone_pfns);
 }
 
-static void setup_zero_page(void)
+static void __init setup_zero_page(void)
 {
 	memset((void *)empty_zero_page, 0, PAGE_SIZE);
 }
@@ -78,7 +78,7 @@ static inline void print_mlm(char *name, unsigned long b, unsigned long t)
 		  (((t) - (b)) >> 20));
 }
 
-static void print_vm_layout(void)
+static void __init print_vm_layout(void)
 {
 	pr_notice("Virtual kernel memory layout:\n");
 	print_mlk("fixmap", (unsigned long)FIXADDR_START,
@@ -630,7 +630,7 @@ static inline void setup_vm_final(void)
 #endif /* CONFIG_MMU */
 
 #ifdef CONFIG_STRICT_KERNEL_RWX
-void protect_kernel_text_data(void)
+void __init protect_kernel_text_data(void)
 {
 	unsigned long text_start = (unsigned long)_start;
 	unsigned long init_text_start = (unsigned long)__init_text_begin;

arch/riscv/mm/kasan_init.c

@@ -48,7 +48,7 @@ asmlinkage void __init kasan_early_init(void)
 	local_flush_tlb_all();
 }
 
-static void kasan_populate_pte(pmd_t *pmd, unsigned long vaddr, unsigned long end)
+static void __init kasan_populate_pte(pmd_t *pmd, unsigned long vaddr, unsigned long end)
 {
 	phys_addr_t phys_addr;
 	pte_t *ptep, *base_pte;
@@ -70,7 +70,7 @@ static void kasan_populate_pte(pmd_t *pmd, unsigned long vaddr, unsigned long en
 	set_pmd(pmd, pfn_pmd(PFN_DOWN(__pa(base_pte)), PAGE_TABLE));
 }
 
-static void kasan_populate_pmd(pgd_t *pgd, unsigned long vaddr, unsigned long end)
+static void __init kasan_populate_pmd(pgd_t *pgd, unsigned long vaddr, unsigned long end)
 {
 	phys_addr_t phys_addr;
 	pmd_t *pmdp, *base_pmd;
@@ -105,7 +105,7 @@ static void kasan_populate_pmd(pgd_t *pgd, unsigned long vaddr, unsigned long en
 	set_pgd(pgd, pfn_pgd(PFN_DOWN(__pa(base_pmd)), PAGE_TABLE));
 }
 
-static void kasan_populate_pgd(unsigned long vaddr, unsigned long end)
+static void __init kasan_populate_pgd(unsigned long vaddr, unsigned long end)
 {
 	phys_addr_t phys_addr;
 	pgd_t *pgdp = pgd_offset_k(vaddr);

arch/riscv/mm/ptdump.c

@@ -358,7 +358,7 @@ static int ptdump_show(struct seq_file *m, void *v)
 
 DEFINE_SHOW_ATTRIBUTE(ptdump);
 
-static int ptdump_init(void)
+static int __init ptdump_init(void)
 {
 	unsigned int i, j;