[PATCH 32/62] mm/slub: Convert shuffle_freelist to struct slab

["Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>]

Improve type safety.

Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
 mm/slub.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index 75a411d6b76e..9a67dda37951 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1831,32 +1831,32 @@ static void *next_freelist_entry(struct kmem_cache *s, struct page *page,
 }
 
 /* Shuffle the single linked freelist based on a random pre-computed sequence */
-static bool shuffle_freelist(struct kmem_cache *s, struct page *page)
+static bool shuffle_freelist(struct kmem_cache *s, struct slab *slab)
 {
 	void *start;
 	void *cur;
 	void *next;
-	unsigned long idx, pos, page_limit, freelist_count;
+	unsigned long idx, pos, slab_limit, freelist_count;
 
-	if (page->objects < 2 || !s->random_seq)
+	if (slab->objects < 2 || !s->random_seq)
 		return false;
 
 	freelist_count = oo_objects(s->oo);
 	pos = get_random_int() % freelist_count;
 
-	page_limit = page->objects * s->size;
-	start = fixup_red_left(s, page_address(page));
+	slab_limit = slab->objects * s->size;
+	start = fixup_red_left(s, slab_address(slab));
 
 	/* First entry is used as the base of the freelist */
-	cur = next_freelist_entry(s, page, &pos, start, page_limit,
+	cur = next_freelist_entry(s, slab_page(slab), &pos, start, slab_limit,
 				freelist_count);
-	cur = setup_object(s, page, cur);
-	page->freelist = cur;
+	cur = setup_object(s, slab_page(slab), cur);
+	slab->freelist = cur;
 
-	for (idx = 1; idx < page->objects; idx++) {
-		next = next_freelist_entry(s, page, &pos, start, page_limit,
+	for (idx = 1; idx < slab->objects; idx++) {
+		next = next_freelist_entry(s, slab_page(slab), &pos, start, slab_limit,
 			freelist_count);
-		next = setup_object(s, page, next);
+		next = setup_object(s, slab_page(slab), next);
 		set_freepointer(s, cur, next);
 		cur = next;
 	}
@@ -1870,7 +1870,7 @@ static inline int init_cache_random_seq(struct kmem_cache *s)
 	return 0;
 }
 static inline void init_freelist_randomization(void) { }
-static inline bool shuffle_freelist(struct kmem_cache *s, struct page *page)
+static inline bool shuffle_freelist(struct kmem_cache *s, struct slab *slab)
 {
 	return false;
 }
@@ -1926,7 +1926,7 @@ static struct slab *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
 
 	setup_page_debug(s, slab_page(slab), start);
 
-	shuffle = shuffle_freelist(s, slab_page(slab));
+	shuffle = shuffle_freelist(s, slab);
 
 	if (!shuffle) {
 		start = fixup_red_left(s, start);
-- 
2.32.0