mempool: hook up to memory allocation profiling

This adds hooks to mempools for correctly annotating mempool-backed
allocations at the correct source line, so they show up correctly in
/sys/kernel/debug/allocations.

Various inline functions are converted to wrappers so that we can invoke
alloc_hooks() in fewer places.

[[e-mail]: undo _noprof additions in the documentation]
Link: https://lkml.kernel.org/r/[e-mail]
[[e-mail]: add missing mempool_create_node documentation]
Link: https://lkml.kernel.org/r/[e-mail]
Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Kent Overstreet <[e-mail]>
Signed-off-by: Suren Baghdasaryan <[e-mail]>
Tested-by: Kees Cook <[e-mail]>
Cc: Alexander Viro <[e-mail]>
Cc: Alex Gaynor <[e-mail]>
Cc: Alice Ryhl <[e-mail]>
Cc: Andreas Hindborg <[e-mail]>
Cc: Benno Lossin <[e-mail]>
Cc: "Björn Roy Baron" <[e-mail]>
Cc: Boqun Feng <[e-mail]>
Cc: Christoph Lameter <[e-mail]>
Cc: Dennis Zhou <[e-mail]>
Cc: Gary Guo <[e-mail]>
Cc: Miguel Ojeda <[e-mail]>
Cc: Pasha Tatashin <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Tejun Heo <[e-mail]>
Cc: Vlastimil Babka <[e-mail]>
Cc: Wedson Almeida Filho <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

include/linux/mempool.h

···
 #ifndef _LINUX_MEMPOOL_H
 #define _LINUX_MEMPOOL_H
 
+#include <linux/sched.h>
+#include <linux/alloc_tag.h>
 #include <linux/wait.h>
 #include <linux/compiler.h>
 
···
 int mempool_init_node(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
 		      mempool_free_t *free_fn, void *pool_data,
 		      gfp_t gfp_mask, int node_id);
-int mempool_init(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
+
+int mempool_init_noprof(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
 		 mempool_free_t *free_fn, void *pool_data);
+#define mempool_init(...)						\
+	alloc_hooks(mempool_init_noprof(__VA_ARGS__))
 
 extern mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
 			mempool_free_t *free_fn, void *pool_data);
-extern mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
+
+extern mempool_t *mempool_create_node_noprof(int min_nr, mempool_alloc_t *alloc_fn,
 			mempool_free_t *free_fn, void *pool_data,
 			gfp_t gfp_mask, int nid);
+#define mempool_create_node(...)					\
+	alloc_hooks(mempool_create_node_noprof(__VA_ARGS__))
+
+#define mempool_create(_min_nr, _alloc_fn, _free_fn, _pool_data)	\
+	mempool_create_node(_min_nr, _alloc_fn, _free_fn, _pool_data,	\
+			    GFP_KERNEL, NUMA_NO_NODE)
 
 extern int mempool_resize(mempool_t *pool, int new_min_nr);
 extern void mempool_destroy(mempool_t *pool);
-extern void *mempool_alloc(mempool_t *pool, gfp_t gfp_mask) __malloc;
+
+extern void *mempool_alloc_noprof(mempool_t *pool, gfp_t gfp_mask) __malloc;
+#define mempool_alloc(...)						\
+	alloc_hooks(mempool_alloc_noprof(__VA_ARGS__))
+
 extern void *mempool_alloc_preallocated(mempool_t *pool) __malloc;
 extern void mempool_free(void *element, mempool_t *pool);
 
···
 void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data);
 void mempool_free_slab(void *element, void *pool_data);
 
-static inline int
-mempool_init_slab_pool(mempool_t *pool, int min_nr, struct kmem_cache *kc)
-{
-	return mempool_init(pool, min_nr, mempool_alloc_slab,
-			    mempool_free_slab, (void *) kc);
-}
-
-static inline mempool_t *
-mempool_create_slab_pool(int min_nr, struct kmem_cache *kc)
-{
-	return mempool_create(min_nr, mempool_alloc_slab, mempool_free_slab,
-			      (void *) kc);
-}
+#define mempool_init_slab_pool(_pool, _min_nr, _kc)			\
+	mempool_init(_pool, (_min_nr), mempool_alloc_slab, mempool_free_slab, (void *)(_kc))
+#define mempool_create_slab_pool(_min_nr, _kc)			\
+	mempool_create((_min_nr), mempool_alloc_slab, mempool_free_slab, (void *)(_kc))
 
 /*
  * a mempool_alloc_t and a mempool_free_t to kmalloc and kfree the
···
 void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data);
 void mempool_kfree(void *element, void *pool_data);
 
-static inline int mempool_init_kmalloc_pool(mempool_t *pool, int min_nr, size_t size)
-{
-	return mempool_init(pool, min_nr, mempool_kmalloc,
-			    mempool_kfree, (void *) size);
-}
-
-static inline mempool_t *mempool_create_kmalloc_pool(int min_nr, size_t size)
-{
-	return mempool_create(min_nr, mempool_kmalloc, mempool_kfree,
-			      (void *) size);
-}
+#define mempool_init_kmalloc_pool(_pool, _min_nr, _size)		\
+	mempool_init(_pool, (_min_nr), mempool_kmalloc, mempool_kfree,	\
+		     (void *)(unsigned long)(_size))
+#define mempool_create_kmalloc_pool(_min_nr, _size)			\
+	mempool_create((_min_nr), mempool_kmalloc, mempool_kfree,	\
+		       (void *)(unsigned long)(_size))
 
 void *mempool_kvmalloc(gfp_t gfp_mask, void *pool_data);
 void mempool_kvfree(void *element, void *pool_data);
···
 void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data);
 void mempool_free_pages(void *element, void *pool_data);
 
-static inline int mempool_init_page_pool(mempool_t *pool, int min_nr, int order)
-{
-	return mempool_init(pool, min_nr, mempool_alloc_pages,
-			    mempool_free_pages, (void *)(long)order);
-}
-
-static inline mempool_t *mempool_create_page_pool(int min_nr, int order)
-{
-	return mempool_create(min_nr, mempool_alloc_pages, mempool_free_pages,
-			      (void *)(long)order);
-}
+#define mempool_init_page_pool(_pool, _min_nr, _order)			\
+	mempool_init(_pool, (_min_nr), mempool_alloc_pages,		\
+		     mempool_free_pages, (void *)(long)(_order))
+#define mempool_create_page_pool(_min_nr, _order)			\
+	mempool_create((_min_nr), mempool_alloc_pages,			\
+		       mempool_free_pages, (void *)(long)(_order))
 
 #endif /* _LINUX_MEMPOOL_H */

mm/mempool.c

···
  *
  * Return: %0 on success, negative error code otherwise.
  */
-int mempool_init(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
-		 mempool_free_t *free_fn, void *pool_data)
+int mempool_init_noprof(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
+			mempool_free_t *free_fn, void *pool_data)
 {
 	return mempool_init_node(pool, min_nr, alloc_fn, free_fn,
 				 pool_data, GFP_KERNEL, NUMA_NO_NODE);
 
 }
-EXPORT_SYMBOL(mempool_init);
+EXPORT_SYMBOL(mempool_init_noprof);
 
 /**
- * mempool_create - create a memory pool
+ * mempool_create_node - create a memory pool
  * @min_nr:    the minimum number of elements guaranteed to be
  *             allocated for this pool.
  * @alloc_fn:  user-defined element-allocation function.
  * @free_fn:   user-defined element-freeing function.
  * @pool_data: optional private data available to the user-defined functions.
+ * @gfp_mask:  memory allocation flags
+ * @node_id:   numa node to allocate on
  *
  * this function creates and allocates a guaranteed size, preallocated
  * memory pool. The pool can be used from the mempool_alloc() and mempool_free()
···
  *
  * Return: pointer to the created memory pool object or %NULL on error.
  */
-mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
-				mempool_free_t *free_fn, void *pool_data)
-{
-	return mempool_create_node(min_nr, alloc_fn, free_fn, pool_data,
-				   GFP_KERNEL, NUMA_NO_NODE);
-}
-EXPORT_SYMBOL(mempool_create);
-
-mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
-			       mempool_free_t *free_fn, void *pool_data,
-			       gfp_t gfp_mask, int node_id)
+mempool_t *mempool_create_node_noprof(int min_nr, mempool_alloc_t *alloc_fn,
+				      mempool_free_t *free_fn, void *pool_data,
+				      gfp_t gfp_mask, int node_id)
 {
 	mempool_t *pool;
 
···
 
 	return pool;
 }
-EXPORT_SYMBOL(mempool_create_node);
+EXPORT_SYMBOL(mempool_create_node_noprof);
 
 /**
  * mempool_resize - resize an existing memory pool
···
  *
  * Return: pointer to the allocated element or %NULL on error.
  */
-void *mempool_alloc(mempool_t *pool, gfp_t gfp_mask)
+void *mempool_alloc_noprof(mempool_t *pool, gfp_t gfp_mask)
 {
 	void *element;
 	unsigned long flags;
···
 	finish_wait(&pool->wait, &wait);
 	goto repeat_alloc;
 }
-EXPORT_SYMBOL(mempool_alloc);
+EXPORT_SYMBOL(mempool_alloc_noprof);
 
 /**
  * mempool_alloc_preallocated - allocate an element from preallocated elements
···
 {
 	struct kmem_cache *mem = pool_data;
 	VM_BUG_ON(mem->ctor);
-	return kmem_cache_alloc(mem, gfp_mask);
+	return kmem_cache_alloc_noprof(mem, gfp_mask);
 }
 EXPORT_SYMBOL(mempool_alloc_slab);
 
···
 void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data)
 {
 	size_t size = (size_t)pool_data;
-	return kmalloc(size, gfp_mask);
+	return kmalloc_noprof(size, gfp_mask);
 }
 EXPORT_SYMBOL(mempool_kmalloc);
 
···
 void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data)
 {
 	int order = (int)(long)pool_data;
-	return alloc_pages(gfp_mask, order);
+	return alloc_pages_noprof(gfp_mask, order);
 }
 EXPORT_SYMBOL(mempool_alloc_pages);