[PATCH v2 4/6] mm/page_ext: rename offset to index

[js1304]

From: Joonsoo Kim <iamjoonsoo....@lge.com>

Here, 'offset' means entry index in page_ext array. Following patch
will use 'offset' for field offset in each entry so rename current
'offset' to prevent confusion.

Signed-off-by: Joonsoo Kim <iamjoonsoo....@lge.com>
---
 mm/page_ext.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/page_ext.c b/mm/page_ext.c
index 44a4c02..1629282 100644
--- a/mm/page_ext.c
+++ b/mm/page_ext.c
@@ -102,7 +102,7 @@ void __meminit pgdat_page_ext_init(struct pglist_data 
*pgdat)
 struct page_ext *lookup_page_ext(struct page *page)
 {
        unsigned long pfn = page_to_pfn(page);
-       unsigned long offset;
+       unsigned long index;
        struct page_ext *base;
 
        base = NODE_DATA(page_to_nid(page))->node_page_ext;
@@ -119,9 +119,9 @@ struct page_ext *lookup_page_ext(struct page *page)
        if (unlikely(!base))
                return NULL;
 #endif
-       offset = pfn - round_down(node_start_pfn(page_to_nid(page)),
+       index = pfn - round_down(node_start_pfn(page_to_nid(page)),
                                        MAX_ORDER_NR_PAGES);
-       return base + offset;
+       return base + index;
 }
 
 static int __init alloc_node_page_ext(int nid)
-- 
1.9.1