linux-kernel - [RFC PATCH v1 06/15] mm/slab_common: cleanup kmalloc

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Date:   Tue,  8 Mar 2022 11:41:33 +0000
From:   Hyeonggon Yoo <42.hyeyoo@...il.com>
To:     linux-mm@...ck.org
Cc:     Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Marco Elver <elver@...gle.com>,
        Matthew WilCox <willy@...radead.org>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        linux-kernel@...r.kernel.org, 42.hyeyoo@...il.com
Subject: [RFC PATCH v1 06/15] mm/slab_common: cleanup kmalloc_large()

Now that kmalloc_large() and kmalloc_large_node() do same job,
make kmalloc_large() wrapper of kmalloc_large_node().

This makes slab allocators to use kmalloc_node tracepoint in
kmalloc_large().

Signed-off-by: Hyeonggon Yoo <42.hyeyoo@...il.com>
---
 include/linux/slab.h |  8 +++++---
 mm/slab_common.c     | 24 ------------------------
 2 files changed, 5 insertions(+), 27 deletions(-)

diff --git a/include/linux/slab.h b/include/linux/slab.h
index 60d27635c13d..8840b2d55567 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -467,12 +467,14 @@ extern void *kmem_cache_alloc_node_trace(struct kmem_cache *s, gfp_t gfpflags,
 					 int node, size_t size) __assume_slab_alignment
 								__alloc_size(4);
 
-extern void *kmalloc_large(size_t size, gfp_t flags) __assume_page_alignment
-						     __alloc_size(1);
-
 extern void *kmalloc_large_node(size_t size, gfp_t flags, int node)
 				__assume_page_alignment __alloc_size(1);
 
+static __always_inline void *kmalloc_large(size_t size, gfp_t flags)
+{
+	return kmalloc_large_node(size, flags, NUMA_NO_NODE);
+}
+
 /**
  * kmalloc - allocate memory
  * @size: how many bytes of memory are required.
diff --git a/mm/slab_common.c b/mm/slab_common.c
index f61ac7458829..1fe2f2a7326d 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -932,30 +932,6 @@ gfp_t kmalloc_fix_flags(gfp_t flags)
  * directly to the page allocator. We use __GFP_COMP, because we will need to
  * know the allocation order to free the pages properly in kfree.
  */
-void *kmalloc_large(size_t size, gfp_t flags)
-{
-	void *ret = NULL;
-	struct page *page;
-	unsigned int order = get_order(size);
-
-	if (unlikely(flags & GFP_SLAB_BUG_MASK))
-		flags = kmalloc_fix_flags(flags);
-
-	flags |= __GFP_COMP;
-	page = alloc_pages(flags, order);
-	if (likely(page)) {
-		ret = page_address(page);
-		mod_lruvec_page_state(page, NR_SLAB_UNRECLAIMABLE_B,
-				      PAGE_SIZE << order);
-	}
-	ret = kasan_kmalloc_large(ret, size, flags);
-	/* As ret might get tagged, call kmemleak hook after KASAN. */
-	kmemleak_alloc(ret, size, 1, flags);
-	trace_kmalloc(_RET_IP_, ret, size, PAGE_SIZE << order, flags);
-	return ret;
-}
-EXPORT_SYMBOL(kmalloc_large);
-
 void *kmalloc_large_node(size_t size, gfp_t flags, int node)
 {
 	struct page *page;
-- 
2.33.1