[merged mm-stable] mm-remove-the-__gfp_no_obj_ext-flag.patch removed from -mm tree

[merged mm-stable] mm-remove-the-__gfp_no_obj_ext-flag.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: remove the __GFP_NO_OBJ_EXT flag
has been removed from the -mm tree.  Its filename was
     mm-remove-the-__gfp_no_obj_ext-flag.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: "Vlastimil Babka (SUSE)" <vbabka@kernel.org>
Subject: mm: remove the __GFP_NO_OBJ_EXT flag
Date: Fri, 03 Jul 2026 12:31:56 +0000

All users of the flag are converted to SLAB_ALLOC_NO_RECURSE or
ALLOC_NO_CODETAG (from __GFP_NO_CODETAG which reused the NO_OBJ_EXT bit). 
Free up the flag bit.

[Rebased onto __GFP_NO_CODETAG removal]
Link: https://lore.kernel.org/20260703-alloc-trylock-v5-16-c87b714e19d3@google.com
Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Signed-off-by: Brendan Jackman <jackmanb@google.com>
Acked-by: Hao Ge <hao.ge@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/gfp_types.h       |    7 -------
 include/trace/events/mmflags.h  |   10 +---------
 tools/include/linux/gfp_types.h |    7 -------
 3 files changed, 1 insertion(+), 23 deletions(-)

--- a/include/linux/gfp_types.h~mm-remove-the-__gfp_no_obj_ext-flag
+++ a/include/linux/gfp_types.h
@@ -55,7 +55,6 @@ enum {
 #ifdef CONFIG_LOCKDEP
 	___GFP_NOLOCKDEP_BIT,
 #endif
-	___GFP_NO_OBJ_EXT_BIT,
 	___GFP_LAST_BIT
 };
 
@@ -96,7 +95,6 @@ enum {
 #else
 #define ___GFP_NOLOCKDEP	0
 #endif
-#define ___GFP_NO_OBJ_EXT       BIT(___GFP_NO_OBJ_EXT_BIT)
 
 /*
  * Physical address zone modifiers (see linux/mmzone.h - low four bits)
@@ -138,17 +136,12 @@ enum {
  *
  * %__GFP_ACCOUNT causes the allocation to be accounted to the active
  * cgroup context.
- *
- * %__GFP_NO_OBJ_EXT causes slab allocation to have no object extension.
- * mark_obj_codetag_empty() should be called upon freeing for objects allocated
- * with this flag to indicate that their NULL tags are expected and normal.
  */
 #define __GFP_RECLAIMABLE ((__force gfp_t)___GFP_RECLAIMABLE)
 #define __GFP_WRITE	((__force gfp_t)___GFP_WRITE)
 #define __GFP_HARDWALL   ((__force gfp_t)___GFP_HARDWALL)
 #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)
 
 /**
  * DOC: Watermark modifiers
--- a/include/trace/events/mmflags.h~mm-remove-the-__gfp_no_obj_ext-flag
+++ a/include/trace/events/mmflags.h
@@ -54,18 +54,10 @@
 # define TRACE_GFP_FLAGS_LOCKDEP
 #endif
 
-#ifdef CONFIG_SLAB_OBJ_EXT
-# define TRACE_GFP_FLAGS_SLAB			\
-	TRACE_GFP_EM(NO_OBJ_EXT)
-#else
-# define TRACE_GFP_FLAGS_SLAB
-#endif
-
 #define TRACE_GFP_FLAGS				\
 	TRACE_GFP_FLAGS_GENERAL			\
 	TRACE_GFP_FLAGS_KASAN			\
-	TRACE_GFP_FLAGS_LOCKDEP			\
-	TRACE_GFP_FLAGS_SLAB
+	TRACE_GFP_FLAGS_LOCKDEP
 
 #undef TRACE_GFP_EM
 #define TRACE_GFP_EM(a) TRACE_DEFINE_ENUM(___GFP_##a##_BIT);
--- a/tools/include/linux/gfp_types.h~mm-remove-the-__gfp_no_obj_ext-flag
+++ a/tools/include/linux/gfp_types.h
@@ -55,7 +55,6 @@ enum {
 #ifdef CONFIG_LOCKDEP
 	___GFP_NOLOCKDEP_BIT,
 #endif
-	___GFP_NO_OBJ_EXT_BIT,
 	___GFP_LAST_BIT
 };
 
@@ -96,7 +95,6 @@ enum {
 #else
 #define ___GFP_NOLOCKDEP	0
 #endif
-#define ___GFP_NO_OBJ_EXT       BIT(___GFP_NO_OBJ_EXT_BIT)
 
 /*
  * Physical address zone modifiers (see linux/mmzone.h - low four bits)
@@ -137,17 +135,12 @@ enum {
  * node with no fallbacks or placement policy enforcements.
  *
  * %__GFP_ACCOUNT causes the allocation to be accounted to kmemcg.
- *
- * %__GFP_NO_OBJ_EXT causes slab allocation to have no object extension.
- * mark_obj_codetag_empty() should be called upon freeing for objects allocated
- * with this flag to indicate that their NULL tags are expected and normal.
  */
 #define __GFP_RECLAIMABLE ((__force gfp_t)___GFP_RECLAIMABLE)
 #define __GFP_WRITE	((__force gfp_t)___GFP_WRITE)
 #define __GFP_HARDWALL   ((__force gfp_t)___GFP_HARDWALL)
 #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)
 
 /**
  * DOC: Watermark modifiers
_

Patches currently in -mm which might be from vbabka@kernel.org are

mm-page_alloc-move-capture_control-to-the-page-allocator.patch