diff options
| author | Liam R. Howlett <[email protected]> | 2023-07-05 14:47:49 -0400 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2023-08-18 10:12:40 -0700 |
| commit | 02fdb25fb41c563a3afbd4a97469c527a6c5abbf (patch) | |
| tree | f12c603e12d65fcd30c37899b3e2669aceea54cd /include/linux | |
| parent | 134d153c9346fc1b2842cacec8720da3a9667a11 (diff) | |
mm/mmap: change detached vma locking scheme
Don't set the lock to the mm lock so that the detached VMA tree does not
complain about being unlocked when the mmap_lock is dropped prior to
freeing the tree.
Introduce mt_on_stack() for setting the external lock to NULL only when
LOCKDEP is used.
Move the destroying of the detached tree outside the mmap lock all
together.
Link: https://lkml.kernel.org/r/20230719183142.ktgcmuj2pnlr3h3s@revolver
Signed-off-by: Liam R. Howlett <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Oliver Sang <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/maple_tree.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h index 6618c1512886..e278b9598428 100644 --- a/include/linux/maple_tree.h +++ b/include/linux/maple_tree.h @@ -187,10 +187,13 @@ typedef struct lockdep_map *lockdep_map_p; #define mt_set_external_lock(mt, lock) \ (mt)->ma_external_lock = &(lock)->dep_map + +#define mt_on_stack(mt) (mt).ma_external_lock = NULL #else typedef struct { /* nothing */ } lockdep_map_p; #define mt_lock_is_held(mt) 1 #define mt_set_external_lock(mt, lock) do { } while (0) +#define mt_on_stack(mt) do { } while (0) #endif /* |