The patch titled
r-o-bind-mounts: track number of mount writers make lockdep happy with r/o bind mounts
has been removed from the -mm tree. Its filename was
r-o-bind-mounts-track-number-of-mount-writers-make-lockdep-happy-with-r-o-bind-mounts.patch
This patch was dropped because it was folded into r-o-bind-mounts-track-number-of-mount-writers.patch
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: r-o-bind-mounts: track number of mount writers make lockdep happy with r/o bind mounts
From: Dave Hansen <haveblue@xxxxxxxxxx>
With the r/o bind mount patches, we can have as many spinlocks nested as there
are CPUs on the system. Lockdep freaks out after 8.
So, create a new lockdep class of locks for the mnt_writer spinlocks, and
initialize each of the cpu locks to be in a different class.
It should shut up warnings like this, while still allowing some of the lockdep
goodness to remain:
=============================================
[ INFO: possible recursive locking detected ]
Signed-off-by: Dave Hansen <haveblue@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/namespace.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN fs/namespace.c~r-o-bind-mounts-track-number-of-mount-writers-make-lockdep-happy-with-r-o-bind-mounts fs/namespace.c
--- a/fs/namespace.c~r-o-bind-mounts-track-number-of-mount-writers-make-lockdep-happy-with-r-o-bind-mounts
+++ a/fs/namespace.c
@@ -115,6 +115,7 @@ struct mnt_writer {
* must be ordered by cpu number.
*/
spinlock_t lock;
+ struct lock_class_key lock_class; /* compiles out with !lockdep */
unsigned long count;
struct vfsmount *mnt;
} ____cacheline_aligned_in_smp;
@@ -126,6 +127,7 @@ static int __init init_mnt_writers(void)
for_each_possible_cpu(cpu) {
struct mnt_writer *writer = &per_cpu(mnt_writers, cpu);
spin_lock_init(&writer->lock);
+ lockdep_set_class(&writer->lock, &writer->lock_class);
writer->count = 0;
}
return 0;
_
Patches currently in -mm which might be from haveblue@xxxxxxxxxx are
origin.patch
enable-hotplug-memory-remove-for-ppc64.patch
add-arch-specific-walk_memory_remove-for-ppc64.patch
reiserfs-eliminate-private-use-of-struct-file-in-xattr.patch
do-namei_flags-calculation-inside-open_namei.patch
make-open_namei-return-a-filp.patch
kill-do_filp_open.patch
kill-filp_open.patch
rename-open_namei-to-open_pathname.patch
r-o-bind-mounts-stub-functions.patch
r-o-bind-mounts-do_rmdir-elevate-write-count.patch
r-o-bind-mounts-elevate-mnt-writers-for-callers-of-vfs_mkdir.patch
r-o-bind-mounts-elevate-mnt-writers-for-vfs_unlink-callers.patch
r-o-bind-mounts-elevate-mount-count-for-extended-attributes.patch
r-o-bind-mounts-elevate-write-count-during-entire-ncp_ioctl.patch
r-o-bind-mounts-elevate-write-count-for-do_sys_utime-and-touch_atime.patch
r-o-bind-mounts-elevate-write-count-for-do_utimes.patch
r-o-bind-mounts-elevate-write-count-for-file_update_time.patch
r-o-bind-mounts-elevate-write-count-for-link-and-symlink-calls.patch
r-o-bind-mounts-elevate-write-count-for-some-ioctls.patch
r-o-bind-mounts-elevate-write-count-opened-files.patch
r-o-bind-mounts-elevate-write-count-over-calls-to-vfs_rename.patch
r-o-bind-mounts-elevate-writer-count-for-chown-and-friends.patch
r-o-bind-mounts-elevate-writer-count-for-do_sys_truncate.patch
r-o-bind-mounts-make-access-use-mnt-check.patch
r-o-bind-mounts-nfs-check-mnt-instead-of-superblock-directly.patch
r-o-bind-mounts-sys_mknodat-elevate-write-count-for-vfs_mknod-create.patch
r-o-bind-mounts-track-number-of-mount-writers.patch
r-o-bind-mounts-track-number-of-mount-writers-make-lockdep-happy-with-r-o-bind-mounts.patch
r-o-bind-mounts-track-number-of-mount-writer-fix-buggy-loop.patch
r-o-bind-mounts-track-number-of-mount-writer-fix-buggy-loop-checkpatch-fixes.patch
r-o-bind-mounts-honor-r-w-changes-at-do_remount-time.patch
keep-track-of-mnt_writer-state-of-struct-file.patch
keep-track-of-mnt_writer-state-of-struct-file-fix-warn_on.patch
keep-track-of-mnt_writer-state-of-struct-file-fix-warn_on-fix.patch
create-file_drop_write_access-helper.patch
fix-up-new-filp-allocators.patch
use-struct-path-in-struct-svc_export-nfsd-fix-wrong-mnt_writer-count-in-rename.patch
reiser4.patch
page-owner-tracking-leak-detector.patch
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