[RFC PATCH v2 03/11] gfp: Add GFP_SPM_NODE for Specific Purpose Memory (SPM) allocations

[Gregory Price <gourry@gourry.net>]

GFP_SPM_NODE changes the nodemask checks in the page allocator to include
the full set memory nodes, rather than just SysRAM nodes.

Signed-off-by: Gregory Price <gourry@gourry.net>
---
 include/linux/gfp_types.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/gfp_types.h b/include/linux/gfp_types.h
index 65db9349f905..525ae891420e 100644
--- a/include/linux/gfp_types.h
+++ b/include/linux/gfp_types.h
@@ -58,6 +58,7 @@ enum {
 #ifdef CONFIG_SLAB_OBJ_EXT
 	___GFP_NO_OBJ_EXT_BIT,
 #endif
+	___GFP_SPM_NODE_BIT,
 	___GFP_LAST_BIT
 };
 
@@ -103,6 +104,7 @@ enum {
 #else
 #define ___GFP_NO_OBJ_EXT       0
 #endif
+#define ___GFP_SPM_NODE		BIT(___GFP_SPM_NODE_BIT)
 
 /*
  * Physical address zone modifiers (see linux/mmzone.h - low four bits)
@@ -145,6 +147,8 @@ enum {
  * %__GFP_ACCOUNT causes the allocation to be accounted to kmemcg.
  *
  * %__GFP_NO_OBJ_EXT causes slab allocation to have no object extension.
+ *
+ * %__GFP_SPM_NODE allows the use of Specific Purpose Memory Nodes
  */
 #define __GFP_RECLAIMABLE ((__force gfp_t)___GFP_RECLAIMABLE)
 #define __GFP_WRITE	((__force gfp_t)___GFP_WRITE)
@@ -152,6 +156,7 @@ enum {
 #define __GFP_THISNODE	((__force gfp_t)___GFP_THISNODE)
 #define __GFP_ACCOUNT	((__force gfp_t)___GFP_ACCOUNT)
 #define __GFP_NO_OBJ_EXT   ((__force gfp_t)___GFP_NO_OBJ_EXT)
+#define __GFP_SPM_NODE	((__force gfp_t)___GFP_SPM_NODE)
 
 /**
  * DOC: Watermark modifiers
-- 
2.51.1