John Stultz 1ca7d67cf5 seqcount: Add lockdep functionality to seqcount/seqlock structures ...

Currently seqlocks and seqcounts don't support lockdep.

After running across a seqcount related deadlock in the timekeeping
code, I used a less-refined and more focused variant of this patch
to narrow down the cause of the issue.

This is a first-pass attempt to properly enable lockdep functionality
on seqlocks and seqcounts.

Since seqcounts are used in the vdso gettimeofday code, I've provided
non-lockdep accessors for those needs.

I've also handled one case where there were nested seqlock writers
and there may be more edge cases.

Comments and feedback would be appreciated!

Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/1381186321-4906-3-git-send-email-john.stultz@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2013-11-06 12:40:26 +01:00

..

9p

9p: don't forget to destroy inode cache if fscache registration fails

2013-09-17 22:31:01 -04:00

adfs

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

affs

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

afs

afs: dget_parent() can't return a negative dentry

2013-09-29 22:02:24 -04:00

autofs4

autofs4: close the races around autofs4_notify_daemon()

2013-09-16 19:16:38 -04:00

befs

[readdir] convert befs

2013-06-29 12:56:55 +04:00

bfs

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

btrfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

2013-10-18 16:46:21 -07:00

cachefiles

CacheFiles: Don't try to dump the index key if the cookie has been cleared

2013-09-20 15:15:43 -07:00

ceph

ceph: use d_invalidate() to invalidate aliases

2013-09-06 12:55:29 -07:00

cifs

cifs: ntstatus_to_dos_map[] is not terminated

2013-10-14 12:14:01 -05:00

coda

helper for reading ->d_count

2013-07-05 18:59:33 +04:00

configfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-07-14 11:42:26 -07:00

cramfs

[readdir] convert f2fs

2013-06-29 12:56:46 +04:00

debugfs

debugfs: debugfs_remove_recursive() must not rely on list_empty(d_subdirs)

2013-07-31 12:16:31 -04:00

devpts

…

dlm

dlm: remove signal blocking

2013-08-12 15:22:43 -05:00

ecryptfs

eCryptfs: fix 32 bit corruption issue

2013-10-24 12:36:30 -07:00

efivarfs

efivarfs: we can use simple_lookup() now

2013-07-14 17:48:35 +04:00

efs

efs: iget_locked() doesn't return an ERR_PTR()

2013-08-24 12:10:22 -04:00

exofs

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

exportfs

exportfs: don't assume that ->iterate() won't feed us too long entries

2013-09-07 19:54:55 -04:00

ext2

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

ext3

ext[34]: fix double put in tmpfile

2013-10-15 12:14:06 -04:00

ext4

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-10-16 17:18:18 -07:00

f2fs

f2fs: optimize gc for better performance

2013-09-05 13:50:32 +09:00

fat

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

freevxfs

[readdir] convert freevxfs

2013-06-29 12:56:53 +04:00

fscache

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client

2013-09-19 12:50:37 -05:00

fuse

fuse: no RCU mode in fuse_access()

2013-10-01 16:41:23 +02:00

gfs2

gfs2: set FILE_CREATED

2013-09-16 19:17:24 -04:00

hfs

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

hfsplus

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

hostfs

um: hostfs: Fix writeback

2013-09-07 10:38:29 +02:00

hpfs

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

hppfs

clean up scary strncpy(dst, src, strlen(src)) uses

2013-07-03 16:07:41 -07:00

hugetlbfs

cope with potentially long ->d_dname() output for shmem/hugetlb

2013-08-24 12:10:17 -04:00

isofs

isofs: Refuse RW mount of the filesystem instead of making it RO

2013-07-31 22:14:50 +02:00

jbd

jbd: use a single printk for jbd_debug()

2013-08-09 10:49:00 +02:00

jbd2

jbd2: Fix endian mixing problems in the checksumming code

2013-08-28 14:59:58 -04:00

jffs2

[readdir] convert jffs2

2013-06-29 12:56:47 +04:00

jfs

Merge tag 'jfs-3.12' of git://github.com/kleikamp/linux-shaggy

2013-10-22 09:01:11 +01:00

lockd

LOCKD: Don't call utsname()->nodename from nlmclnt_setlockargs

2013-08-05 15:03:46 -04:00

logfs

Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

2013-07-02 09:39:34 -07:00

minix

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

ncpfs

ncpfs: fix error return code in ncp_parse_options()

2013-07-09 10:33:25 -07:00

nfs

NFS: Give "flavor" an initial value to fix a compile warning

2013-09-29 16:03:34 -04:00

nfs_common

…

nfsd

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-09-12 15:01:38 -07:00

nilfs2

nilfs2: fix issue with race condition of competition between segments for dirty blocks

2013-09-30 14:31:02 -07:00

nls

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notify

fsnotify: update comments concerning locking scheme

2013-07-09 10:33:20 -07:00

ntfs

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

ocfs2

ocfs2: needs ->d_lock to poke in ->d_parent->d_inode from ->d_revalidate()

2013-09-29 22:02:20 -04:00

omfs

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

openpromfs

[readdir] convert openpromfs

2013-06-29 12:56:32 +04:00

proc

Merge branch 'linus' into sched/core

2013-11-01 08:24:41 +01:00

pstore

pstore: Remove the messages related to compression failure

2013-09-16 09:28:29 -07:00

qnx4

[readdir] convert qnx4

2013-06-29 12:56:38 +04:00

qnx6

[readdir] convert qnx6

2013-06-29 12:56:39 +04:00

quota

fs: convert fs shrinkers to new scan/count API

2013-09-10 18:56:31 -04:00

ramfs

initmpfs: move rootfs code from fs/ramfs/ to init/

2013-09-11 15:59:37 -07:00

reiserfs

reiserfs: fix race with flush_used_journal_lists and flush_journal_list

2013-09-24 11:24:21 +02:00

romfs

[readdir] convert romfs

2013-06-29 12:56:29 +04:00

squashfs

Squashfs: add corruption check for type in squashfs_readdir()

2013-09-06 04:57:54 +01:00

sysfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-09-07 14:36:57 -07:00

sysv

sysv: Add forgotten superblock lock init for v7 fs

2013-09-29 22:02:02 -04:00

ubifs

Merge tag 'upstream-3.12-rc1' of git://git.infradead.org/linux-ubifs

2013-09-16 15:36:55 -04:00

udf

udf: Fortify LVID loading

2013-09-24 11:23:33 +02:00

ufs

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

xfs

xfs: Use kmem_free() instead of free()

2013-10-04 13:56:12 -05:00

aio.c

aio: fix use-after-free in aio_migratepage

2013-09-26 20:34:51 -04:00

anon_inodes.c

fs/anon_inode: Introduce a new lib function anon_inode_getfile_private()

2013-07-16 09:32:17 -04:00

attr.c

…

bad_inode.c

[readdir] ->readdir() is gone

2013-06-29 12:57:04 +04:00

binfmt_aout.c

mm: remove free_area_cache

2013-07-10 18:11:34 -07:00

binfmt_elf_fdpic.c

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

2013-05-02 10:16:16 -07:00

binfmt_elf.c

fs/binfmt_elf.c: prevent a coredump with a large vm_map_count from Oopsing

2013-09-30 14:31:01 -07:00

binfmt_em86.c

…

binfmt_flat.c

new helper: read_code()

2013-04-29 15:40:23 -04:00

binfmt_misc.c

binfmt_misc: reuse string_unescape_inplace()

2013-04-30 17:04:03 -07:00

binfmt_script.c

…

binfmt_som.c

…

bio-integrity.c

Merge branch 'for-3.12/core' of git://git.kernel.dk/linux-block

2013-09-22 15:00:11 -07:00

bio.c

block: Fix bio_copy_data()

2013-09-24 14:41:42 -07:00

block_dev.c

Merge tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux

2013-09-13 23:06:40 -04:00

buffer.c

fs: buffer: move allocation failure loop into the allocator

2013-10-16 21:35:53 -07:00

char_dev.c

…

compat_binfmt_elf.c

…

compat_ioctl.c

compat.c: LOOP_CLR_FD is taken care of in loop.c itself...

2013-06-29 12:46:44 +04:00

compat.c

[readdir] constify ->actor

2013-06-29 12:57:05 +04:00

coredump.c

coredump: add new %P variable in core_pattern

2013-09-11 15:59:01 -07:00

coredump.h

…

dcache.c

seqcount: Add lockdep functionality to seqcount/seqlock structures

2013-11-06 12:40:26 +01:00

dcookies.c

…

direct-io.c

direct-io: Use return from cmpxchg to decide of assignment happened

2013-09-09 10:47:42 -07:00

drop_caches.c

shrinker: add node awareness

2013-09-10 18:56:31 -04:00

eventfd.c

…

eventpoll.c

Revert "epoll: use freezable blocking call"

2013-10-30 15:27:53 +01:00

exec.c

sched/numa: Call task_numa_free() from do_execve()

2013-10-09 14:48:00 +02:00

fcntl.c

vfs: add missing check for __O_TMPFILE in fcntl_init()

2013-08-05 18:25:32 +04:00

fhandle.c

…

file_table.c

nfsd regression since delayed fput()

2013-10-20 08:44:39 -04:00

file.c

don't bother with deferred freeing of fdtables

2013-05-01 17:31:42 -04:00

filesystems.c

…

fs_struct.c

seqcount: Add lockdep functionality to seqcount/seqlock structures

2013-11-06 12:40:26 +01:00

fs-writeback.c

Merge tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux

2013-09-13 23:06:40 -04:00

generic_acl.c

…

inode.c

fs: convert inode and dentry shrinking to be node aware

2013-09-10 18:56:31 -04:00

internal.h

fs: convert inode and dentry shrinking to be node aware

2013-09-10 18:56:31 -04:00

ioctl.c

…

ioprio.c

…

Kconfig

efivarfs: Move to fs/efivarfs

2013-04-17 13:25:09 +01:00

Kconfig.binfmt

fs: make binfmt support for #! scripts modular and removable

2013-04-30 17:04:04 -07:00

libfs.c

make simple_lookup() usable for filesystems that set ->s_d_op

2013-07-14 17:43:25 +04:00

locks.c

locks: move file_lock_list to a set of percpu hlist_heads and convert file_lock_lock to an lglock

2013-07-08 13:36:42 +04:00

Makefile

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-05-01 17:51:54 -07:00

mbcache.c

fs: convert fs shrinkers to new scan/count API

2013-09-10 18:56:31 -04:00

mount.h

get rid of full-hash scan on detaching vfsmounts

2013-04-09 14:12:52 -04:00

mpage.c

…

namei.c

fs/namei.c: fix new kernel-doc warning

2013-10-22 12:02:40 +01:00

namespace.c

initmpfs: move rootfs code from fs/ramfs/ to init/

2013-09-11 15:59:37 -07:00

no-block.c

…

open.c

vfs: improve i_op->atomic_open() documentation

2013-09-16 19:17:24 -04:00

pipe.c

aio: don't include aio.h in sched.h

2013-05-07 20:16:25 -07:00

pnode.c

vfs: Fix invalid ida_remove() call

2013-05-31 15:16:33 -04:00

pnode.h

vfs: Don't copy mount bind mounts of /proc/<pid>/ns/mnt between namespaces

2013-08-26 18:42:15 -07:00

posix_acl.c

…

proc_namespace.c

…

read_write.c

aio: Kill aio_rw_vect_retry()

2013-07-30 11:53:12 -04:00

readdir.c

[readdir] constify ->actor

2013-06-29 12:57:05 +04:00

select.c

Revert "select: use freezable blocking call"

2013-10-30 15:28:35 +01:00

seq_file.c

seq_file: always update file->f_pos in seq_lseek()

2013-10-25 10:46:40 -04:00

signalfd.c

…

splice.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-07-03 09:10:19 -07:00

stack.c

…

stat.c

quota: provide interface for readding allocated space into reserved space

2013-08-17 09:32:32 -04:00

statfs.c

vfs: allow O_PATH file descriptors for fstatfs()

2013-10-12 13:12:31 -07:00

super.c

fs/super.c: fix lru_list leak for real

2013-10-01 13:11:21 -04:00

sync.c

…

timerfd.c

timerfd: Add alarm timers

2013-05-29 12:57:34 -07:00

utimes.c

…

xattr_acl.c

…

xattr.c

…