mm/slub: Convert print_page_info() to print_slab_info()

Improve the type safety and prepare for further conversion. For flags
access, convert to folio internally.

[ vbabka@suse.cz: access flags via folio_flags() ]

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>

diff --git a/mm/slub.c b/mm/slub.c
index 14550e7bee717ff5dbe7c90d809aa28e9775f6f8..d3e9e322b4e24c33e21539acbb72fb388552b76e 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -788,12 +788,13 @@ void print_tracking(struct kmem_cache *s, void *object)
        print_track("Freed", get_track(s, object, TRACK_FREE), pr_time);
 }
 
-static void print_page_info(struct page *page)
+static void print_slab_info(const struct slab *slab)
 {
-       pr_err("Slab 0x%p objects=%u used=%u fp=0x%p flags=%pGp\n",
-              page, page->objects, page->inuse, page->freelist,
-              &page->flags);
+       struct folio *folio = (struct folio *)slab_folio(slab);
 
+       pr_err("Slab 0x%p objects=%u used=%u fp=0x%p flags=%pGp\n",
+              slab, slab->objects, slab->inuse, slab->freelist,
+              folio_flags(folio, 0));
 }
 
 static void slab_bug(struct kmem_cache *s, char *fmt, ...)
@@ -833,7 +834,7 @@ static void print_trailer(struct kmem_cache *s, struct page *page, u8 *p)
 
        print_tracking(s, p);
 
-       print_page_info(page);
+       print_slab_info(page_slab(page));
 
        pr_err("Object 0x%p @offset=%tu fp=0x%p\n\n",
               p, p - addr, get_freepointer(s, p));
@@ -903,7 +904,7 @@ static __printf(3, 4) void slab_err(struct kmem_cache *s, struct page *page,
        vsnprintf(buf, sizeof(buf), fmt, args);
        va_end(args);
        slab_bug(s, "%s", buf);
-       print_page_info(page);
+       print_slab_info(page_slab(page));
        dump_stack();
        add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
 }