[PATCH] mm: remove __paginginit

[Pavel Tatashin]

__paginginit is the same thing as __meminit except for platforms without
sparsemem, there it is defined as __init.

Remove __paginginit and use __meminit. Use __ref in one single function
that merges __meminit and __init sections: setup_usemap().

Signed-off-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
---
 mm/internal.h   | 12 ------------
 mm/page_alloc.c | 19 ++++++++++---------
 2 files changed, 10 insertions(+), 21 deletions(-)

diff --git a/mm/internal.h b/mm/internal.h
index 33c22754d282..87256ae1bef8 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -389,18 +389,6 @@ static inline struct page *mem_map_next(struct page *iter,
 	return iter + 1;
 }
 
-/*
- * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node,
- * so all functions starting at paging_init should be marked __init
- * in those cases. SPARSEMEM, however, allows for memory hotplug,
- * and alloc_bootmem_node is not used.
- */
-#ifdef CONFIG_SPARSEMEM
-#define __paginginit __meminit
-#else
-#define __paginginit __init
-#endif
-
 /* Memory initialisation debug and verification */
 enum mminit_level {
 	MMINIT_WARNING,
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 02e4b84038f8..92abe3eb151d 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6122,7 +6122,7 @@ static unsigned long __init usemap_size(unsigned long zone_start_pfn, unsigned l
 	return usemapsize / 8;
 }
 
-static void __init setup_usemap(struct pglist_data *pgdat,
+static void __ref setup_usemap(struct pglist_data *pgdat,
 				struct zone *zone,
 				unsigned long zone_start_pfn,
 				unsigned long zonesize)
@@ -6142,7 +6142,7 @@ static inline void setup_usemap(struct pglist_data *pgdat, struct zone *zone,
 #ifdef CONFIG_HUGETLB_PAGE_SIZE_VARIABLE
 
 /* Initialise the number of pages represented by NR_PAGEBLOCK_BITS */
-void __paginginit set_pageblock_order(void)
+void __meminit set_pageblock_order(void)
 {
 	unsigned int order;
 
@@ -6170,14 +6170,14 @@ void __paginginit set_pageblock_order(void)
  * include/linux/pageblock-flags.h for the values of pageblock_order based on
  * the kernel config
  */
-void __paginginit set_pageblock_order(void)
+void __meminit set_pageblock_order(void)
 {
 }
 
 #endif /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */
 
-static unsigned long __paginginit calc_memmap_size(unsigned long spanned_pages,
-						   unsigned long present_pages)
+static unsigned long __meminit calc_memmap_size(unsigned long spanned_pages,
+						unsigned long present_pages)
 {
 	unsigned long pages = spanned_pages;
 
@@ -6204,7 +6204,7 @@ static unsigned long __paginginit calc_memmap_size(unsigned long spanned_pages,
  *
  * NOTE: pgdat should get zeroed by caller.
  */
-static void __paginginit free_area_init_core(struct pglist_data *pgdat)
+static void __meminit free_area_init_core(struct pglist_data *pgdat)
 {
 	enum zone_type j;
 	int nid = pgdat->node_id;
@@ -6344,8 +6344,9 @@ static void __ref alloc_node_mem_map(struct pglist_data *pgdat)
 static void __ref alloc_node_mem_map(struct pglist_data *pgdat) { }
 #endif /* CONFIG_FLAT_NODE_MEM_MAP */
 
-void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
-		unsigned long node_start_pfn, unsigned long *zholes_size)
+void __meminit free_area_init_node(int nid, unsigned long *zones_size,
+				   unsigned long node_start_pfn,
+				   unsigned long *zholes_size)
 {
 	pg_data_t *pgdat = NODE_DATA(nid);
 	unsigned long start_pfn = 0;
@@ -6390,7 +6391,7 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
  * may be accessed (for example page_to_pfn() on some configuration accesses
  * flags). We must explicitly zero those struct pages.
  */
-void __paginginit zero_resv_unavail(void)
+void __meminit zero_resv_unavail(void)
 {
 	phys_addr_t start, end;
 	unsigned long pfn;
-- 
2.18.0