mm: rename kernel_init_free_pages to kernel_init_pages

Rename kernel_init_free_pages() to kernel_init_pages().  This function is
not only used for free pages but also for pages that were just allocated.

Link: https://lkml.kernel.org/r/1ecaffc0a9c1404d4d7cf52efe0b2dc8a0c681d8.1654798516.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/page_alloc.c

@@ -1296,7 +1296,7 @@ static inline bool should_skip_kasan_poison(struct page *page, fpi_t fpi_flags)
 	       PageSkipKASanPoison(page);
 }
 
-static void kernel_init_free_pages(struct page *page, int numpages)
+static void kernel_init_pages(struct page *page, int numpages)
 {
 	int i;
 
@@ -1396,7 +1396,7 @@ static __always_inline bool free_pages_prepare(struct page *page,
 			init = false;
 	}
 	if (init)
-		kernel_init_free_pages(page, 1 << order);
+		kernel_init_pages(page, 1 << order);
 
 	/*
 	 * arch_free_page() can make the page's contents inaccessible.  s390
@@ -2441,7 +2441,7 @@ inline void post_alloc_hook(struct page *page, unsigned int order,
 	}
 	/* If memory is still not initialized, do it now. */
 	if (init)
-		kernel_init_free_pages(page, 1 << order);
+		kernel_init_pages(page, 1 << order);
 	/* Propagate __GFP_SKIP_KASAN_POISON to page flags. */
 	if (kasan_hw_tags_enabled() && (gfp_flags & __GFP_SKIP_KASAN_POISON))
 		SetPageSkipKASanPoison(page);