powerpc/mm: Add __init attribute to eligible functions

Some functions defined in 'arch/powerpc/mm' are deserving of an
`__init` macro attribute. These functions are only called by other
initialization functions and therefore should inherit the attribute.
Also, change function declarations in header files to include `__init`.
Signed-off-by: Nick Child <nick.child@ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211216220035.605465-4-nick.child@ibm.com

arch/powerpc/include/asm/hugetlb.h

@@ -15,7 +15,7 @@
 
 extern bool hugetlb_disabled;
 
-void hugetlbpage_init_default(void);
+void __init hugetlbpage_init_default(void);
 
 int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
 			   unsigned long len);

arch/powerpc/include/asm/mmu_context.h

@@ -71,7 +71,7 @@ static inline void switch_mmu_context(struct mm_struct *prev,
 }
 
 extern int hash__alloc_context_id(void);
-extern void hash__reserve_context_id(int id);
+void __init hash__reserve_context_id(int id);
 extern void __destroy_context(int context_id);
 static inline void mmu_context_init(void) { }
 

arch/powerpc/mm/book3s32/mmu.c

@@ -76,7 +76,7 @@ unsigned long p_block_mapped(phys_addr_t pa)
 	return 0;
 }
 
-static int find_free_bat(void)
+static int __init find_free_bat(void)
 {
 	int b;
 	int n = mmu_has_feature(MMU_FTR_USE_HIGH_BATS) ? 8 : 4;

arch/powerpc/mm/book3s64/hash_utils.c

@@ -662,7 +662,7 @@ static int __init htab_dt_scan_hugepage_blocks(unsigned long node,
 }
 #endif /* CONFIG_HUGETLB_PAGE */
 
-static void mmu_psize_set_default_penc(void)
+static void __init mmu_psize_set_default_penc(void)
 {
 	int bpsize, apsize;
 	for (bpsize = 0; bpsize < MMU_PAGE_COUNT; bpsize++)
@@ -672,7 +672,7 @@ static void mmu_psize_set_default_penc(void)
 
 #ifdef CONFIG_PPC_64K_PAGES
 
-static bool might_have_hea(void)
+static bool __init might_have_hea(void)
 {
 	/*
 	 * The HEA ethernet adapter requires awareness of the
@@ -743,7 +743,7 @@ static void __init htab_scan_page_sizes(void)
  * low-order N bits as the encoding for the 2^(12+N) byte page size
  * (if it exists).
  */
-static void init_hpte_page_sizes(void)
+static void __init init_hpte_page_sizes(void)
 {
 	long int ap, bp;
 	long int shift, penc;

arch/powerpc/mm/book3s64/hugetlbpage.c

@@ -150,7 +150,7 @@ void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr
 	set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
 }
 
-void hugetlbpage_init_default(void)
+void __init hugetlbpage_init_default(void)
 {
 	/* Set default large page size. Currently, we pick 16M or 1M
 	 * depending on what is available

arch/powerpc/mm/book3s64/mmu_context.c

@@ -32,7 +32,7 @@ static int alloc_context_id(int min_id, int max_id)
 }
 
 #ifdef CONFIG_PPC_64S_HASH_MMU
-void hash__reserve_context_id(int id)
+void __init hash__reserve_context_id(int id)
 {
 	int result = ida_alloc_range(&mmu_context_ida, id, id, GFP_KERNEL);
 

arch/powerpc/mm/book3s64/pkeys.c

@@ -66,7 +66,7 @@ static int __init dt_scan_storage_keys(unsigned long node,
 	return 1;
 }
 
-static int scan_pkey_feature(void)
+static int __init scan_pkey_feature(void)
 {
 	int ret;
 	int pkeys_total = 0;

arch/powerpc/mm/book3s64/radix_pgtable.c

@@ -499,7 +499,7 @@ static int __init probe_memory_block_size(unsigned long node, const char *uname,
 	return 1;
 }
 
-static unsigned long radix_memory_block_size(void)
+static unsigned long __init radix_memory_block_size(void)
 {
 	unsigned long mem_block_size = MIN_MEMORY_BLOCK_SIZE;
 
@@ -517,7 +517,7 @@ static unsigned long radix_memory_block_size(void)
 
 #else   /* CONFIG_MEMORY_HOTPLUG */
 
-static unsigned long radix_memory_block_size(void)
+static unsigned long __init radix_memory_block_size(void)
 {
 	return 1UL * 1024 * 1024 * 1024;
 }

arch/powerpc/mm/nohash/44x.c

@@ -38,7 +38,7 @@ int icache_44x_need_flush;
 
 unsigned long tlb_47x_boltmap[1024/8];
 
-static void ppc44x_update_tlb_hwater(void)
+static void __init ppc44x_update_tlb_hwater(void)
 {
 	/* The TLB miss handlers hard codes the watermark in a cmpli
 	 * instruction to improve performances rather than loading it
@@ -122,7 +122,7 @@ static void __init ppc47x_update_boltmap(void)
 /*
  * "Pins" a 256MB TLB entry in AS0 for kernel lowmem for 47x type MMU
  */
-static void ppc47x_pin_tlb(unsigned int virt, unsigned int phys)
+static void __init ppc47x_pin_tlb(unsigned int virt, unsigned int phys)
 {
 	unsigned int rA;
 	int bolted;

arch/powerpc/mm/nohash/fsl_book3e.c

@@ -259,7 +259,7 @@ void __init MMU_init_hw(void)
 	flush_instruction_cache();
 }
 
-static unsigned long tlbcam_sz(int idx)
+static unsigned long __init tlbcam_sz(int idx)
 {
 	return tlbcam_addrs[idx].limit - tlbcam_addrs[idx].start + 1;
 }

arch/powerpc/mm/nohash/tlb.c

@@ -432,7 +432,7 @@ void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address)
 	}
 }
 
-static void setup_page_sizes(void)
+static void __init setup_page_sizes(void)
 {
 	unsigned int tlb0cfg;
 	unsigned int tlb0ps;
@@ -570,7 +570,7 @@ static void setup_page_sizes(void)
 	}
 }
 
-static void setup_mmu_htw(void)
+static void __init setup_mmu_htw(void)
 {
 	/*
 	 * If we want to use HW tablewalk, enable it by patching the TLB miss

arch/powerpc/mm/numa.c

@@ -134,7 +134,7 @@ static int __init fake_numa_create_new_node(unsigned long end_pfn,
 	return 0;
 }
 
-static void reset_numa_cpu_lookup_table(void)
+static void __init reset_numa_cpu_lookup_table(void)
 {
 	unsigned int cpu;
 
@@ -372,7 +372,7 @@ void update_numa_distance(struct device_node *node)
  * ibm,numa-lookup-index-table= {N, domainid1, domainid2, ..... domainidN}
  * ibm,numa-distance-table = { N, 1, 2, 4, 5, 1, 6, .... N elements}
  */
-static void initialize_form2_numa_distance_lookup_table(void)
+static void __init initialize_form2_numa_distance_lookup_table(void)
 {
 	int i, j;
 	struct device_node *root;
@@ -581,7 +581,7 @@ static int of_get_assoc_arrays(struct assoc_arrays *aa)
 	return 0;
 }
 
-static int get_nid_and_numa_distance(struct drmem_lmb *lmb)
+static int __init get_nid_and_numa_distance(struct drmem_lmb *lmb)
 {
 	struct assoc_arrays aa = { .arrays = NULL };
 	int default_nid = NUMA_NO_NODE;

arch/powerpc/mm/ptdump/ptdump.c

@@ -315,7 +315,7 @@ static int ptdump_show(struct seq_file *m, void *v)
 
 DEFINE_SHOW_ATTRIBUTE(ptdump);
 
-static void build_pgtable_complete_mask(void)
+static void __init build_pgtable_complete_mask(void)
 {
 	unsigned int i, j;