BACKPORT: mm: multi-gen LRU: minimal implementation

[platform/kernel/linux-rpi.git] / include / linux / page-flags-layout.h

diff --git a/include/linux/page-flags-layout.h b/include/linux/page-flags-layout.h
index 706c361..154f74a 100644 (file)
--- a/include/linux/page-flags-layout.h
+++ b/include/linux/page-flags-layout.h
@@ -96,7 +96,10 @@
 #error "Not enough bits in page flags"
 #endif
 
-#define LRU_REFS_WIDTH 0
+/* see the comment on MAX_NR_TIERS */
+#define LRU_REFS_WIDTH min(__LRU_REFS_WIDTH, BITS_PER_LONG - NR_PAGEFLAGS - \
+                           ZONES_WIDTH - LRU_GEN_WIDTH - SECTIONS_WIDTH - \
+                           NODES_WIDTH - KASAN_TAG_WIDTH - LAST_CPUPID_WIDTH)
 
 /*
  * We are going to use the flags for the page to node mapping if its in