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

From: thunder . leizhen
Date: Tue Aug 01 2023 - 23:46:10 EST

From: Zhen Lei <thunder.leizhen@xxxxxxxxxx>

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@xxxxxxxxxx>
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);
bool kmem_valid_obj(void *object);
void kmem_dump_obj(void *object);
+static inline bool kmem_valid_obj(void *object) { return false; }
+static inline void kmem_dump_obj(void *object) {}