mm/slub: mark slab_free_freelist_hook() __always_inline

It seems we need to be more forceful with the compiler on this one.  This
is done for performance reasons only.

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

Author: Kent Overstreet

mm/slub.c

@@ -2106,9 +2106,9 @@ bool slab_free_hook(struct kmem_cache *s, void *x, bool init)
 	return !kasan_slab_free(s, x, init);
 }
 
-static inline bool slab_free_freelist_hook(struct kmem_cache *s,
-					   void **head, void **tail,
-					   int *cnt)
+static __fastpath_inline
+bool slab_free_freelist_hook(struct kmem_cache *s, void **head, void **tail,
+			     int *cnt)
 {
 
 	void *object;