Using default_gfp() only depends on the GFP_KERNEL value. Move
default_gfp() into gfp_types.h so that future use in devres.h doesn't
require pulling in all of gfp.h.

Signed-off-by: Kees Cook <kees@kernel.org>
---
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: "Liam R. Howlett" <liam@infradead.org>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Brendan Jackman <brendan.jackman@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Zi Yan <ziy@nvidia.com>
Cc: <linux-mm@kvack.org>
---
 include/linux/gfp.h       | 4 ----
 include/linux/gfp_types.h | 4 ++++
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 872bc53f32ec..b62e2fd53cb4 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -13,10 +13,6 @@
 struct vm_area_struct;
 struct mempolicy;
 
-/* Helper macro to avoid gfp flags if they are the default one */
-#define __default_gfp(a,b,...) b
-#define default_gfp(...) __default_gfp(,##__VA_ARGS__,GFP_KERNEL)
-
 static inline bool gfpflags_allow_blocking(const gfp_t gfp_flags)
 {
 	return !!(gfp_flags & __GFP_DIRECT_RECLAIM);
diff --git a/include/linux/gfp_types.h b/include/linux/gfp_types.h
index 190191411009..b1cd143f3c42 100644
--- a/include/linux/gfp_types.h
+++ b/include/linux/gfp_types.h
@@ -382,4 +382,8 @@ enum {
 			 __GFP_NOMEMALLOC | __GFP_NOWARN) & ~__GFP_RECLAIM)
 #define GFP_TRANSHUGE	(GFP_TRANSHUGE_LIGHT | __GFP_DIRECT_RECLAIM)
 
+/* Helper macro to avoid gfp flags if they are the default one */
+#define __default_gfp(a,b,...) b
+#define default_gfp(...) __default_gfp(,##__VA_ARGS__,GFP_KERNEL)
+
 #endif /* __LINUX_GFP_TYPES_H */
-- 
2.34.1