arm64: 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 <Jisheng.Zhang@synaptics.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20210330135449.4dcffd7f@xhacker.debian
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Author: rvosk

arch/arm64/include/asm/ptdump.h

@@ -23,7 +23,7 @@ struct ptdump_info {
 
 void ptdump_walk(struct seq_file *s, struct ptdump_info *info);
 #ifdef CONFIG_PTDUMP_DEBUGFS
-void ptdump_debugfs_register(struct ptdump_info *info, const char *name);
+void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name);
 #else
 static inline void ptdump_debugfs_register(struct ptdump_info *info,
 					   const char *name) { }

arch/arm64/kernel/vdso.c

@@ -86,7 +86,7 @@ static int vdso_mremap(const struct vm_special_mapping *sm,
 	return 0;
 }
 
-static int __vdso_init(enum vdso_abi abi)
+static int __init __vdso_init(enum vdso_abi abi)
 {
 	int i;
 	struct page **vdso_pagelist;
@@ -326,7 +326,7 @@ static int aarch32_alloc_sigpage(void)
 	return 0;
 }
 
-static int __aarch32_alloc_vdso_pages(void)
+static int __init __aarch32_alloc_vdso_pages(void)
 {
 
 	if (!IS_ENABLED(CONFIG_COMPAT_VDSO))

arch/arm64/mm/ptdump.c

@@ -337,7 +337,7 @@ void ptdump_walk(struct seq_file *s, struct ptdump_info *info)
 	ptdump_walk_pgd(&st.ptdump, info->mm, NULL);
 }
 
-static void ptdump_initialize(void)
+static void __init ptdump_initialize(void)
 {
 	unsigned i, j;
 
@@ -381,7 +381,7 @@ void ptdump_check_wx(void)
 		pr_info("Checked W+X mappings: passed, no W+X pages found\n");
 }
 
-static int ptdump_init(void)
+static int __init ptdump_init(void)
 {
 	address_markers[PAGE_END_NR].start_address = PAGE_END;
 #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)

arch/arm64/mm/ptdump_debugfs.c

@@ -16,7 +16,7 @@ static int ptdump_show(struct seq_file *m, void *v)
 }
 DEFINE_SHOW_ATTRIBUTE(ptdump);
 
-void ptdump_debugfs_register(struct ptdump_info *info, const char *name)
+void __init ptdump_debugfs_register(struct ptdump_info *info, const char *name)
 {
 	debugfs_create_file(name, 0400, NULL, info, &ptdump_fops);
 }