[RFC PATCH v1 08/15] mm/sl[auo]b: cleanup kmalloc()

[Hyeonggon Yoo]

Now that kmalloc() and kmalloc_node() do same job, make kmalloc()
wrapper of kmalloc_node().

Remove kmalloc_trace() that is now unused. This patch makes slab
allocator use kmalloc_node tracepoints in kmalloc().

Signed-off-by: Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx>
---
 include/linux/slab.h | 82 +++++++++++++++++---------------------------
 mm/slab.c            | 14 --------
 mm/slub.c            |  9 -----
 3 files changed, 31 insertions(+), 74 deletions(-)

diff --git a/include/linux/slab.h b/include/linux/slab.h
index 33d4260bce8b..dfcc8301d969 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -460,9 +460,6 @@ static __always_inline void kfree_bulk(size_t size, void **p)
 	kmem_cache_free_bulk(NULL, size, p);
 }
 
-extern void *kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t flags, size_t size)
-				   __assume_slab_alignment __alloc_size(3);
-
 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);
@@ -475,6 +472,36 @@ static __always_inline void *kmalloc_large(size_t size, gfp_t flags)
 	return kmalloc_large_node(size, flags, NUMA_NO_NODE);
 }
 
+#ifndef CONFIG_SLOB
+static __always_inline __alloc_size(1) void *kmalloc_node(size_t size, gfp_t flags, int node)
+{
+	if (__builtin_constant_p(size)) {
+		unsigned int index;
+
+		if (size > KMALLOC_MAX_CACHE_SIZE)
+			return kmalloc_large(size, flags);
+
+		index = kmalloc_index(size);
+
+		if (!index)
+			return ZERO_SIZE_PTR;
+
+		return kmem_cache_alloc_node_trace(
+				kmalloc_caches[kmalloc_type(flags)][index],
+						flags, node, size);
+	}
+	return __kmalloc_node(size, flags, node);
+}
+#else
+static __always_inline __alloc_size(1) void *kmalloc_node(size_t size, gfp_t flags, int node)
+{
+	if (__builtin_constant_p(size) && size > KMALLOC_MAX_CACHE_SIZE)
+		return kmalloc_large(size, flags);
+
+	return __kmalloc_node(size, flags, node);
+}
+#endif
+
 /**
  * kmalloc - allocate memory
  * @size: how many bytes of memory are required.
@@ -531,55 +558,8 @@ static __always_inline void *kmalloc_large(size_t size, gfp_t flags)
  */
 static __always_inline __alloc_size(1) void *kmalloc(size_t size, gfp_t flags)
 {
-	if (__builtin_constant_p(size)) {
-#ifndef CONFIG_SLOB
-		unsigned int index;
-#endif
-		if (size > KMALLOC_MAX_CACHE_SIZE)
-			return kmalloc_large(size, flags);
-#ifndef CONFIG_SLOB
-		index = kmalloc_index(size);
-
-		if (!index)
-			return ZERO_SIZE_PTR;
-
-		return kmem_cache_alloc_trace(
-				kmalloc_caches[kmalloc_type(flags)][index],
-				flags, size);
-#endif
-	}
-	return __kmalloc(size, flags);
-}
-
-#ifndef CONFIG_SLOB
-static __always_inline __alloc_size(1) void *kmalloc_node(size_t size, gfp_t flags, int node)
-{
-	if (__builtin_constant_p(size)) {
-		unsigned int index;
-
-		if (size > KMALLOC_MAX_CACHE_SIZE)
-			return kmalloc_large_node(size, flags, node);
-
-		index = kmalloc_index(size);
-
-		if (!index)
-			return ZERO_SIZE_PTR;
-
-		return kmem_cache_alloc_node_trace(
-				kmalloc_caches[kmalloc_type(flags)][i],
-						flags, node, size);
-	}
-	return __kmalloc_node(size, flags, node);
-}
-#else
-static __always_inline __alloc_size(1) void *kmalloc_node(size_t size, gfp_t flags, int node)
-{
-	if (__builtin_constant_p(size) && size > KMALLOC_MAX_CACHE_SIZE)
-		return kmalloc_large_node(size, flags, node);
-
-	return __kmalloc_node(size, flags, node);
+	return kmalloc_node(size, flags, NUMA_NO_NODE);
 }
-#endif
 
 /**
  * kmalloc_array - allocate memory for an array.
diff --git a/mm/slab.c b/mm/slab.c
index 1f3195344bdf..6ebf509bf2de 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3519,20 +3519,6 @@ int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size,
 }
 EXPORT_SYMBOL(kmem_cache_alloc_bulk);
 
-void *
-kmem_cache_alloc_trace(struct kmem_cache *cachep, gfp_t flags, size_t size)
-{
-	void *ret;
-
-	ret = slab_alloc(cachep, flags, size, _RET_IP_);
-
-	ret = kasan_kmalloc(cachep, ret, size, flags);
-	trace_kmalloc(_RET_IP_, ret,
-		      size, cachep->size, flags);
-	return ret;
-}
-EXPORT_SYMBOL(kmem_cache_alloc_trace);
-
 /**
  * kmem_cache_alloc_node - Allocate an object on the specified node
  * @cachep: The cache to allocate from.
diff --git a/mm/slub.c b/mm/slub.c
index cdbbf0e97637..d8fb987ff7e0 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3230,15 +3230,6 @@ static __always_inline void *slab_alloc(struct kmem_cache *s,
 	return slab_alloc_node(s, gfpflags, NUMA_NO_NODE, addr, orig_size);
 }
 
-void *kmem_cache_alloc_trace(struct kmem_cache *s, gfp_t gfpflags, size_t size)
-{
-	void *ret = slab_alloc(s, gfpflags, _RET_IP_, size);
-	trace_kmalloc(_RET_IP_, ret, size, s->size, gfpflags);
-	ret = kasan_kmalloc(s, ret, size, gfpflags);
-	return ret;
-}
-EXPORT_SYMBOL(kmem_cache_alloc_trace);
-
 void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node)
 {
 	void *ret = slab_alloc_node(s, gfpflags, node, _RET_IP_, s->object_size);
-- 
2.33.1