+ maple_tree-relax-lockdep-checks-for-on-stack-trees.patch added to mm-unstable branch

+ maple_tree-relax-lockdep-checks-for-on-stack-trees.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: maple_tree: relax lockdep checks for on-stack trees
has been added to the -mm mm-unstable branch.  Its filename is
     maple_tree-relax-lockdep-checks-for-on-stack-trees.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-relax-lockdep-checks-for-on-stack-trees.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Subject: maple_tree: relax lockdep checks for on-stack trees
Date: Fri, 14 Jul 2023 15:55:49 -0400

To support early release of the maple tree locks, do not lockdep check the
lock if it is set to NULL.  This is intended for the special case on-stack
use of tracking entries and not for general use.

Link: https://lkml.kernel.org/r/20230714195551.894800-3-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oliver Sang <oliver.sang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/maple_tree.h |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/include/linux/maple_tree.h~maple_tree-relax-lockdep-checks-for-on-stack-trees
+++ a/include/linux/maple_tree.h
@@ -182,7 +182,9 @@ enum maple_type {
 
 #ifdef CONFIG_LOCKDEP
 typedef struct lockdep_map *lockdep_map_p;
-#define mt_lock_is_held(mt)	lock_is_held(mt->ma_external_lock)
+#define mt_lock_is_held(mt)                                             \
+	(!(mt)->ma_external_lock || lock_is_held((mt)->ma_external_lock))
+
 #define mt_set_external_lock(mt, lock)					\
 	(mt)->ma_external_lock = &(lock)->dep_map
 #else
_

Patches currently in -mm which might be from Liam.Howlett@oracle.com are

mm-mmap-clean-up-validate_mm-calls.patch
maple_tree-relax-lockdep-checks-for-on-stack-trees.patch
mm-mmap-change-detached-vma-locking-scheme.patch
maple_tree-be-more-strict-about-locking.patch

+ maple_tree-relax-lockdep-checks-for-on-stack-trees.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: maple_tree: relax lockdep checks for on-stack trees
has been added to the -mm mm-unstable branch.  Its filename is
     maple_tree-relax-lockdep-checks-for-on-stack-trees.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-relax-lockdep-checks-for-on-stack-trees.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Subject: maple_tree: relax lockdep checks for on-stack trees
Date: Fri, 14 Jul 2023 15:55:49 -0400

To support early release of the maple tree locks, do not lockdep check the
lock if it is set to NULL.  This is intended for the special case on-stack
use of tracking entries and not for general use.

Link: https://lkml.kernel.org/r/20230714195551.894800-3-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oliver Sang <oliver.sang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/maple_tree.h |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/include/linux/maple_tree.h~maple_tree-relax-lockdep-checks-for-on-stack-trees
+++ a/include/linux/maple_tree.h
@@ -182,7 +182,9 @@ enum maple_type {
 
 #ifdef CONFIG_LOCKDEP
 typedef struct lockdep_map *lockdep_map_p;
-#define mt_lock_is_held(mt)	lock_is_held(mt->ma_external_lock)
+#define mt_lock_is_held(mt)                                             \
+	(!(mt)->ma_external_lock || lock_is_held((mt)->ma_external_lock))
+
 #define mt_set_external_lock(mt, lock)					\
 	(mt)->ma_external_lock = &(lock)->dep_map
 #else
_

Patches currently in -mm which might be from Liam.Howlett@oracle.com are

mm-mlock-fix-vma-iterator-conversion-of-apply_vma_lock_flags.patch
maple_tree-fix-32-bit-mas_next-testing.patch
maple_tree-fix-node-allocation-testing-on-32-bit.patch
mm-mmap-clean-up-validate_mm-calls.patch
maple_tree-relax-lockdep-checks-for-on-stack-trees.patch
mm-mmap-change-detached-vma-locking-scheme.patch
maple_tree-be-more-strict-about-locking.patch