[PATCH v3 1/2] mm: Provide empty function for kmem_dump_obj() when CONFIG_PRINTK=n

[thunder.leizhen@huaweicloud.com]

From: Zhen Lei <thunder.leizhen@huawei.com>

Commit 5bb1bb353cfe ("mm: Don't build mm_dump_obj() on CONFIG_PRINTK=n
kernels") only provides static inline empty function for mem_dump_obj().
But functions kmem_valid_obj() and kmem_dump_obj() are also exported,
they may be called by functions other than mem_dump_obj(), so their empty
functions should also be provided when CONFIG_PRINTK=n.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
---
 include/linux/slab.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/slab.h b/include/linux/slab.h
index 848c7c82ad5ad0b..fc05fe288d176b4 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -246,6 +246,9 @@ size_t ksize(const void *objp);
 #ifdef CONFIG_PRINTK
 bool kmem_valid_obj(void *object);
 void kmem_dump_obj(void *object);
+#else
+static inline bool kmem_valid_obj(void *object) { return false; }
+static inline void kmem_dump_obj(void *object) {}
 #endif
 
 /*
-- 
2.34.1