linux-kernel - [PATCH v3 3/4] mm/sparse: Add a new parameter 'data_unit_size' for alloc_usemap_and

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Date:   Wed, 28 Feb 2018 11:26:56 +0800
From:   Baoquan He <bhe@...hat.com>
To:     linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
        dave.hansen@...el.com, pagupta@...hat.com
Cc:     linux-mm@...ck.org, kirill.shutemov@...ux.intel.com,
        Baoquan He <bhe@...hat.com>
Subject: [PATCH v3 3/4] mm/sparse: Add a new parameter 'data_unit_size' for alloc_usemap_and_memmap

It's used to pass the size of map data unit into alloc_usemap_and_memmap,
and is preparation for next patch.

Signed-off-by: Baoquan He <bhe@...hat.com>
---
 mm/sparse.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/mm/sparse.c b/mm/sparse.c
index 5769a0a79dc1..e1aa2f44530d 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -528,10 +528,12 @@ void __weak __meminit vmemmap_populate_print_last(void)
 /**
  *  alloc_usemap_and_memmap - memory alloction for pageblock flags and vmemmap
  *  @map: usemap_map for pageblock flags or mmap_map for vmemmap
+ *  @unit_size: size of map unit
  */
 static void __init alloc_usemap_and_memmap(void (*alloc_func)
 					(void *, unsigned long, unsigned long,
-					unsigned long, int), void *data)
+					unsigned long, int), void *data,
+					int data_unit_size)
 {
 	unsigned long pnum;
 	unsigned long map_count;
@@ -608,7 +610,8 @@ void __init sparse_init(void)
 	if (!usemap_map)
 		panic("can not allocate usemap_map\n");
 	alloc_usemap_and_memmap(sparse_early_usemaps_alloc_node,
-							(void *)usemap_map);
+				(void *)usemap_map,
+				sizeof(usemap_map[0]));
 
 #ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
 	size2 = sizeof(struct page *) * NR_MEM_SECTIONS;
@@ -616,7 +619,8 @@ void __init sparse_init(void)
 	if (!map_map)
 		panic("can not allocate map_map\n");
 	alloc_usemap_and_memmap(sparse_early_mem_maps_alloc_node,
-							(void *)map_map);
+				(void *)map_map,
+				sizeof(map_map[0]));
 #endif
 
 	for_each_present_section_nr(0, pnum) {
-- 
2.13.6