mm: add a reminder comment for __GFP_BITS_SHIFT

[can-eth-gw-linux.git] / include / linux / gfp.h

diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 76e1aa206f574d34cdcf0a69682b5d34332c5b87..f74856e17e488deb9698f610511fcfed44f35ba3 100644 (file)
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -30,9 +30,11 @@ struct vm_area_struct;
 #define ___GFP_HARDWALL                0x20000u
 #define ___GFP_THISNODE                0x40000u
 #define ___GFP_RECLAIMABLE     0x80000u
-#define ___GFP_NOTRACK         0x100000u
-#define ___GFP_OTHER_NODE      0x200000u
-#define ___GFP_WRITE           0x400000u
+#define ___GFP_NOTRACK         0x200000u
+#define ___GFP_NO_KSWAPD       0x400000u
+#define ___GFP_OTHER_NODE      0x800000u
+#define ___GFP_WRITE           0x1000000u
+/* If the above are modified, __GFP_BITS_SHIFT may need updating */
 
 /*
  * GFP bitmasks..
@@ -85,6 +87,7 @@ struct vm_area_struct;
 #define __GFP_RECLAIMABLE ((__force gfp_t)___GFP_RECLAIMABLE) /* Page is reclaimable */
 #define __GFP_NOTRACK  ((__force gfp_t)___GFP_NOTRACK)  /* Don't track with kmemcheck */
 
+#define __GFP_NO_KSWAPD        ((__force gfp_t)___GFP_NO_KSWAPD)
 #define __GFP_OTHER_NODE ((__force gfp_t)___GFP_OTHER_NODE) /* On behalf of other node */
 #define __GFP_WRITE    ((__force gfp_t)___GFP_WRITE)   /* Allocator intends to dirty page */
 
@@ -94,7 +97,7 @@ struct vm_area_struct;
  */
 #define __GFP_NOTRACK_FALSE_POSITIVE (__GFP_NOTRACK)
 
-#define __GFP_BITS_SHIFT 23    /* Room for N __GFP_FOO bits */
+#define __GFP_BITS_SHIFT 25    /* Room for N __GFP_FOO bits */
 #define __GFP_BITS_MASK ((__force gfp_t)((1 << __GFP_BITS_SHIFT) - 1))
 
 /* This equals 0, but use constants in case they ever change */
@@ -114,7 +117,8 @@ struct vm_area_struct;
                                 __GFP_MOVABLE)
 #define GFP_IOFS       (__GFP_IO | __GFP_FS)
 #define GFP_TRANSHUGE  (GFP_HIGHUSER_MOVABLE | __GFP_COMP | \
-                        __GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_NOWARN)
+                        __GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_NOWARN | \
+                        __GFP_NO_KSWAPD)
 
 #ifdef CONFIG_NUMA
 #define GFP_THISNODE   (__GFP_THISNODE | __GFP_NOWARN | __GFP_NORETRY)
@@ -263,7 +267,7 @@ static inline enum zone_type gfp_zone(gfp_t flags)
 
 static inline int gfp_zonelist(gfp_t flags)
 {
-       if (NUMA_BUILD && unlikely(flags & __GFP_THISNODE))
+       if (IS_ENABLED(CONFIG_NUMA) && unlikely(flags & __GFP_THISNODE))
                return 1;
 
        return 0;