[PATCH v9 mm-unstable 15/18] mm/zsmalloc: convert get_zspage() to take zpdesc

[Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx>]

Now that all users except get_next_page() (which will be removed in
later patch) use zpdesc, convert get_zspage() to take zpdesc instead
of page.

Signed-off-by: Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx>
Signed-off-by: Alex Shi <alexs@xxxxxxxxxx>
---
 mm/zsmalloc.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 19c1ca3957f2..a1a620192596 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -757,9 +757,9 @@ static int fix_fullness_group(struct size_class *class, struct zspage *zspage)
 	return newfg;
 }
 
-static struct zspage *get_zspage(struct page *page)
+static struct zspage *get_zspage(struct zpdesc *zpdesc)
 {
-	struct zspage *zspage = (struct zspage *)page_private(page);
+	struct zspage *zspage = zpdesc->zspage;
 
 	BUG_ON(zspage->magic != ZSPAGE_MAGIC);
 	return zspage;
@@ -767,7 +767,7 @@ static struct zspage *get_zspage(struct page *page)
 
 static struct page *get_next_page(struct page *page)
 {
-	struct zspage *zspage = get_zspage(page);
+	struct zspage *zspage = get_zspage(page_zpdesc(page));
 
 	if (unlikely(ZsHugePage(zspage)))
 		return NULL;
@@ -777,7 +777,7 @@ static struct page *get_next_page(struct page *page)
 
 static struct zpdesc *get_next_zpdesc(struct zpdesc *zpdesc)
 {
-	struct zspage *zspage = get_zspage(zpdesc_page(zpdesc));
+	struct zspage *zspage = get_zspage(zpdesc);
 
 	if (unlikely(ZsHugePage(zspage)))
 		return NULL;
@@ -827,7 +827,7 @@ static inline bool obj_allocated(struct zpdesc *zpdesc, void *obj,
 				 unsigned long *phandle)
 {
 	unsigned long handle;
-	struct zspage *zspage = get_zspage(zpdesc_page(zpdesc));
+	struct zspage *zspage = get_zspage(zpdesc);
 
 	if (unlikely(ZsHugePage(zspage))) {
 		VM_BUG_ON_PAGE(!is_first_zpdesc(zpdesc), zpdesc_page(zpdesc));
@@ -1232,7 +1232,7 @@ void *zs_map_object(struct zs_pool *pool, unsigned long handle,
 	read_lock(&pool->migrate_lock);
 	obj = handle_to_obj(handle);
 	obj_to_location(obj, &zpdesc, &obj_idx);
-	zspage = get_zspage(zpdesc_page(zpdesc));
+	zspage = get_zspage(zpdesc);
 
 	/*
 	 * migration cannot move any zpages in this zspage. Here, class->lock
@@ -1282,7 +1282,7 @@ void zs_unmap_object(struct zs_pool *pool, unsigned long handle)
 
 	obj = handle_to_obj(handle);
 	obj_to_location(obj, &zpdesc, &obj_idx);
-	zspage = get_zspage(zpdesc_page(zpdesc));
+	zspage = get_zspage(zpdesc);
 	class = zspage_class(pool, zspage);
 	off = offset_in_page(class->size * obj_idx);
 
@@ -1445,7 +1445,7 @@ static void obj_free(int class_size, unsigned long obj)
 
 	obj_to_location(obj, &f_zpdesc, &f_objidx);
 	f_offset = offset_in_page(class_size * f_objidx);
-	zspage = get_zspage(zpdesc_page(f_zpdesc));
+	zspage = get_zspage(f_zpdesc);
 
 	vaddr = kmap_local_zpdesc(f_zpdesc);
 	link = (struct link_free *)(vaddr + f_offset);
@@ -1479,7 +1479,7 @@ void zs_free(struct zs_pool *pool, unsigned long handle)
 	read_lock(&pool->migrate_lock);
 	obj = handle_to_obj(handle);
 	obj_to_zpdesc(obj, &f_zpdesc);
-	zspage = get_zspage(zpdesc_page(f_zpdesc));
+	zspage = get_zspage(f_zpdesc);
 	class = zspage_class(pool, zspage);
 	spin_lock(&class->lock);
 	read_unlock(&pool->migrate_lock);
@@ -1812,7 +1812,7 @@ static int zs_page_migrate(struct page *newpage, struct page *page,
 	__SetPageZsmalloc(zpdesc_page(newzpdesc));
 
 	/* The page is locked, so this pointer must remain valid */
-	zspage = get_zspage(zpdesc_page(zpdesc));
+	zspage = get_zspage(zpdesc);
 	pool = zspage->pool;
 
 	/*
-- 
2.43.5