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linux-2.6/fs
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Jeff Layton 09e50d55a9 lockdep: annotate cifs in-kernel sockets 
Put CIFS sockets in their own class to avoid some lockdep warnings. CIFS
sockets are not exposed to user-space, and so are not subject to the
same deadlock scenarios.

A similar change was made a couple of years ago for RPC sockets in commit
ed07536ed6.

This patch should prevent lockdep false-positives like this one:

=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.18-98.el5.jtltest.38.bz456320.1debug #1
-------------------------------------------------------
test5/2483 is trying to acquire lock:
 (sk_lock-AF_INET){--..}, at: [<ffffffff800270d2>] tcp_sendmsg+0x1c/0xb2f

but task is already holding lock:
 (&inode->i_alloc_sem){--..}, at: [<ffffffff8002e454>] notify_change+0xf5/0x2e0

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #3 (&inode->i_alloc_sem){--..}:
       [<ffffffff800a817c>] __lock_acquire+0x9a9/0xadf
       [<ffffffff800a8a72>] lock_acquire+0x55/0x70
       [<ffffffff8002e454>] notify_change+0xf5/0x2e0
       [<ffffffff800a4e36>] down_write+0x3c/0x68
       [<ffffffff8002e454>] notify_change+0xf5/0x2e0
       [<ffffffff800e358d>] do_truncate+0x50/0x6b
       [<ffffffff8005197c>] get_write_access+0x40/0x46
       [<ffffffff80012cf1>] may_open+0x1d3/0x22e
       [<ffffffff8001bc81>] open_namei+0x2c6/0x6dd
       [<ffffffff800289c6>] do_filp_open+0x1c/0x38
       [<ffffffff800683ef>] _spin_unlock+0x17/0x20
       [<ffffffff800167a7>] get_unused_fd+0xf9/0x107
       [<ffffffff8001a704>] do_sys_open+0x44/0xbe
       [<ffffffff80060116>] system_call+0x7e/0x83
       [<ffffffffffffffff>] 0xffffffffffffffff

-> #2 (&sysfs_inode_imutex_key){--..}:
       [<ffffffff800a817c>] __lock_acquire+0x9a9/0xadf
       [<ffffffff8010f6df>] create_dir+0x26/0x1d7
       [<ffffffff800a8a72>] lock_acquire+0x55/0x70
       [<ffffffff8010f6df>] create_dir+0x26/0x1d7
       [<ffffffff800671c0>] mutex_lock_nested+0x104/0x29c
       [<ffffffff800a819d>] __lock_acquire+0x9ca/0xadf
       [<ffffffff8010f6df>] create_dir+0x26/0x1d7
       [<ffffffff8010fc67>] sysfs_create_dir+0x58/0x76
       [<ffffffff8015144c>] kobject_add+0xdb/0x198
       [<ffffffff801be765>] class_device_add+0xb2/0x465
       [<ffffffff8005a6ff>] kobject_get+0x12/0x17
       [<ffffffff80225265>] register_netdevice+0x270/0x33e
       [<ffffffff8022538c>] register_netdev+0x59/0x67
       [<ffffffff80464d40>] net_olddevs_init+0xb/0xac
       [<ffffffff80448a79>] init+0x1f9/0x2fc
       [<ffffffff80068885>] _spin_unlock_irq+0x24/0x27
       [<ffffffff80067f86>] trace_hardirqs_on_thunk+0x35/0x37
       [<ffffffff80061079>] child_rip+0xa/0x11
       [<ffffffff80068885>] _spin_unlock_irq+0x24/0x27
       [<ffffffff800606a8>] restore_args+0x0/0x30
       [<ffffffff80179a59>] acpi_ds_init_one_object+0x0/0x80
       [<ffffffff80448880>] init+0x0/0x2fc
       [<ffffffff8006106f>] child_rip+0x0/0x11
       [<ffffffffffffffff>] 0xffffffffffffffff

-> #1 (rtnl_mutex){--..}:
       [<ffffffff800a817c>] __lock_acquire+0x9a9/0xadf
       [<ffffffff8025acf8>] ip_mc_leave_group+0x23/0xb7
       [<ffffffff800a8a72>] lock_acquire+0x55/0x70
       [<ffffffff8025acf8>] ip_mc_leave_group+0x23/0xb7
       [<ffffffff800671c0>] mutex_lock_nested+0x104/0x29c
       [<ffffffff8025acf8>] ip_mc_leave_group+0x23/0xb7
       [<ffffffff802451b0>] do_ip_setsockopt+0x6d1/0x9bf
       [<ffffffff800a575e>] lock_release_holdtime+0x27/0x48
       [<ffffffff800a575e>] lock_release_holdtime+0x27/0x48
       [<ffffffff8006a85e>] do_page_fault+0x503/0x835
       [<ffffffff8012cbf6>] socket_has_perm+0x5b/0x68
       [<ffffffff80245556>] ip_setsockopt+0x22/0x78
       [<ffffffff8021c973>] sys_setsockopt+0x91/0xb7
       [<ffffffff800602a6>] tracesys+0xd5/0xdf
       [<ffffffffffffffff>] 0xffffffffffffffff

-> #0 (sk_lock-AF_INET){--..}:
       [<ffffffff800a5037>] print_stack_trace+0x59/0x68
       [<ffffffff800a8092>] __lock_acquire+0x8bf/0xadf
       [<ffffffff800a8a72>] lock_acquire+0x55/0x70
       [<ffffffff800270d2>] tcp_sendmsg+0x1c/0xb2f
       [<ffffffff80035466>] lock_sock+0xd4/0xe4
       [<ffffffff80096e91>] _local_bh_enable+0xcb/0xe0
       [<ffffffff800606a8>] restore_args+0x0/0x30
       [<ffffffff800270d2>] tcp_sendmsg+0x1c/0xb2f
       [<ffffffff80057540>] sock_sendmsg+0xf3/0x110
       [<ffffffff800a2bb6>] autoremove_wake_function+0x0/0x2e
       [<ffffffff800a10e4>] kernel_text_address+0x1a/0x26
       [<ffffffff8006f4e2>] dump_trace+0x211/0x23a
       [<ffffffff800a6d3d>] find_usage_backwards+0x5f/0x88
       [<ffffffff8840221a>] MD5Final+0xaf/0xc2 [cifs]
       [<ffffffff884032ec>] cifs_calculate_signature+0x55/0x69 [cifs]
       [<ffffffff8021d891>] kernel_sendmsg+0x35/0x47
       [<ffffffff883ff38e>] smb_send+0xa3/0x151 [cifs]
       [<ffffffff883ff5de>] SendReceive+0x1a2/0x448 [cifs]
       [<ffffffff800a812f>] __lock_acquire+0x95c/0xadf
       [<ffffffff883e758a>] CIFSSMBSetEOF+0x20d/0x25b [cifs]
       [<ffffffff883fa430>] cifs_set_file_size+0x110/0x3b7 [cifs]
       [<ffffffff883faa89>] cifs_setattr+0x3b2/0x6f6 [cifs]
       [<ffffffff8002e454>] notify_change+0xf5/0x2e0
       [<ffffffff8002e4a4>] notify_change+0x145/0x2e0
       [<ffffffff800e358d>] do_truncate+0x50/0x6b
       [<ffffffff8005197c>] get_write_access+0x40/0x46
       [<ffffffff80012cf1>] may_open+0x1d3/0x22e
       [<ffffffff8001bc81>] open_namei+0x2c6/0x6dd
       [<ffffffff800289c6>] do_filp_open+0x1c/0x38
       [<ffffffff800683ef>] _spin_unlock+0x17/0x20
       [<ffffffff800167a7>] get_unused_fd+0xf9/0x107
       [<ffffffff8001a704>] do_sys_open+0x44/0xbe
       [<ffffffff800602a6>] tracesys+0xd5/0xdf
       [<ffffffffffffffff>] 0xffffffffffffffff

other info that might help us debug this:

2 locks held by test5/2483:
 #0:  (&inode->i_mutex){--..}, at: [<ffffffff800e3582>] do_truncate+0x45/0x6b
 #1:  (&inode->i_alloc_sem){--..}, at: [<ffffffff8002e454>] notify_change+0xf5/0x2e0

stack backtrace:

Call Trace:
 [<ffffffff800a6a7b>] print_circular_bug_tail+0x65/0x6e
 [<ffffffff800a5037>] print_stack_trace+0x59/0x68
 [<ffffffff800a8092>] __lock_acquire+0x8bf/0xadf
 [<ffffffff800a8a72>] lock_acquire+0x55/0x70
 [<ffffffff800270d2>] tcp_sendmsg+0x1c/0xb2f
 [<ffffffff80035466>] lock_sock+0xd4/0xe4
 [<ffffffff80096e91>] _local_bh_enable+0xcb/0xe0
 [<ffffffff800606a8>] restore_args+0x0/0x30
 [<ffffffff800270d2>] tcp_sendmsg+0x1c/0xb2f
 [<ffffffff80057540>] sock_sendmsg+0xf3/0x110
 [<ffffffff800a2bb6>] autoremove_wake_function+0x0/0x2e
 [<ffffffff800a10e4>] kernel_text_address+0x1a/0x26
 [<ffffffff8006f4e2>] dump_trace+0x211/0x23a
 [<ffffffff800a6d3d>] find_usage_backwards+0x5f/0x88
 [<ffffffff8840221a>] :cifs:MD5Final+0xaf/0xc2
 [<ffffffff884032ec>] :cifs:cifs_calculate_signature+0x55/0x69
 [<ffffffff8021d891>] kernel_sendmsg+0x35/0x47
 [<ffffffff883ff38e>] :cifs:smb_send+0xa3/0x151
 [<ffffffff883ff5de>] :cifs:SendReceive+0x1a2/0x448
 [<ffffffff800a812f>] __lock_acquire+0x95c/0xadf
 [<ffffffff883e758a>] :cifs:CIFSSMBSetEOF+0x20d/0x25b
 [<ffffffff883fa430>] :cifs:cifs_set_file_size+0x110/0x3b7
 [<ffffffff883faa89>] :cifs:cifs_setattr+0x3b2/0x6f6
 [<ffffffff8002e454>] notify_change+0xf5/0x2e0
 [<ffffffff8002e4a4>] notify_change+0x145/0x2e0
 [<ffffffff800e358d>] do_truncate+0x50/0x6b
 [<ffffffff8005197c>] get_write_access+0x40/0x46
 [<ffffffff80012cf1>] may_open+0x1d3/0x22e
 [<ffffffff8001bc81>] open_namei+0x2c6/0x6dd
 [<ffffffff800289c6>] do_filp_open+0x1c/0x38
 [<ffffffff800683ef>] _spin_unlock+0x17/0x20
 [<ffffffff800167a7>] get_unused_fd+0xf9/0x107
 [<ffffffff8001a704>] do_sys_open+0x44/0xbe
 [<ffffffff800602a6>] tracesys+0xd5/0xdf

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-07-23 18:25:38 +00:00
..
9p 9p: fix O_APPEND in legacy mode 2008-07-03 09:59:03 -05:00
adfs fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
affs [PATCH] fix reservation discarding in affs 2008-05-06 13:45:33 -04:00
afs Fix various old email addresses for dwmw2 2008-06-06 11:29:10 -07:00
autofs mount options: fix autofs 2008-02-08 09:22:40 -08:00
autofs4 autofs: path_{get,put}() cleanups 2008-05-01 08:04:01 -07:00
befs byteorder: don't directly include linux/byteorder/generic.h 2008-05-16 12:01:45 -07:00
bfs fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
cifs lockdep: annotate cifs in-kernel sockets 2008-07-23 18:25:38 +00:00
coda codafs: fix build warning 2008-04-29 08:06:04 -07:00
configfs configfs: Allow ->make_item() and ->make_group() to return detailed errors. 2008-07-17 15:21:29 -07:00
cramfs fs: Remove unnecessary inclusions of asm/semaphore.h 2008-04-18 22:16:44 -04:00
debugfs DEBUGFS: Correct location of debugfs API documentation. 2008-04-30 16:52:47 -07:00
devpts devpts: factor out PTY index allocation 2008-04-30 08:29:48 -07:00
dlm configfs: Allow ->make_item() and ->make_group() to return detailed errors. 2008-07-17 15:21:29 -07:00
ecryptfs Merge commit 'v2.6.26' into bkl-removal 2008-07-14 15:29:34 -06:00
efs efs: update error msg to not refer to deleted read_inode() 2008-04-02 15:28:19 -07:00
exportfs fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
ext2 ext2: retry block allocation if new blocks are allocated from system zone 2008-04-28 08:58:43 -07:00
ext3 ext3: add missing unlock to error path in ext3_quota_write() 2008-07-04 10:40:05 -07:00
ext4 ext4: do not set extents feature from the kernel 2008-07-11 19:27:31 -04:00
fat Merge commit 'v2.6.26' into bkl-removal 2008-07-14 15:29:34 -06:00
freevxfs fs/freevxfs/: proper externs 2008-04-29 08:06:00 -07:00
fuse fuse: fix thinko in max I/O size calucation 2008-06-17 18:08:10 -07:00
gfs2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw 2008-07-15 10:38:46 -07:00
hfs hfs: fix warning with 64k PAGE_SIZE 2008-04-30 08:29:52 -07:00
hfsplus Fix hfsplus oops on image without extents 2008-05-13 08:02:24 -07:00
hostfs uml: fix hostfs tv_usec calculations 2008-02-05 09:44:30 -08:00
hpfs mount options: fix hpfs 2008-02-08 09:22:40 -08:00
hppfs fix hppfs Makefile breakage 2008-05-21 16:55:58 -07:00
hugetlbfs mm: bdi: add separate writeback accounting capability 2008-04-30 08:29:50 -07:00
isofs isofs: fix access to unallocated memory when reading corrupted filesystem 2008-04-30 08:29:33 -07:00
jbd jbd: need to hold j_state_lock to updates to transaction t_state to T_COMMIT 2008-05-14 19:11:14 -07:00
jbd2 ext4: Add ordered mode support for delalloc 2008-07-11 19:27:31 -04:00
jffs2 Merge git://git.infradead.org/mtd-2.6 2008-05-01 11:15:28 -07:00
jfs jfs: remove DIRENTSIZ 2008-06-10 15:12:58 -05:00
lockd Merge branch 'for-2.6.27' of git://linux-nfs.org/~bfields/linux 2008-07-20 21:21:46 -07:00
minix iget: stop the MINIX filesystem from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
msdos Replace BKL with superblock lock in fat/msdos/vfat 2008-06-20 14:05:54 -06:00
ncpfs Remove BKL from remote_llseek v2 2008-07-02 15:06:27 -06:00
nfs Merge branch 'bkl-removal' into next 2008-07-15 18:34:58 -04:00
nfs_common
nfsd Merge branch 'for-2.6.27' of git://linux-nfs.org/~bfields/linux 2008-07-20 21:21:46 -07:00
nls
ntfs ntfs: le*_add_cpu conversion 2008-05-24 09:56:08 -07:00
ocfs2 configfs: Allow ->make_item() and ->make_group() to return detailed errors. 2008-07-17 15:21:29 -07:00
openpromfs iget: stop OPENPROMFS from using iget() and read_inode() 2008-02-07 08:42:29 -08:00
partitions fs: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:54 -07:00
proc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-07-20 17:43:29 -07:00
qnx4 iget: stop QNX4 from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
ramfs ramfs: enable splice write 2008-07-04 09:52:14 +02:00
reiserfs reiserfs: discard prealloc in reiserfs_delete_inode 2008-07-08 12:39:31 -07:00
romfs ROMFS: Fix up an error in iget removal 2008-03-19 18:53:36 -07:00
smbfs Remove BKL from remote_llseek v2 2008-07-02 15:06:27 -06:00
sysfs sysfs: remove error messages for -EEXIST case 2008-05-14 22:34:16 -07:00
sysv sysv: [bl]e*_add_cpu conversion 2008-04-30 08:29:52 -07:00
ubifs UBIFS: include to compilation 2008-07-15 17:35:24 +03:00
udf udf: Fix regression in UDF anchor block detection 2008-06-24 11:38:03 +02:00
ufs ufs: remove unneeded ufs_put_inode prototype 2008-05-13 08:02:23 -07:00
vfat Replace BKL with superblock lock in fat/msdos/vfat 2008-06-20 14:05:54 -06:00
xfs Fix reference counting race on log buffers 2008-07-11 11:37:18 -07:00
aio.c uml: activate_mm: remove the dead PF_BORROWED_MM check 2008-06-06 11:36:22 -07:00
anon_inodes.c [PATCH] sanitize anon_inode_getfd() 2008-05-01 13:08:50 -04:00
attr.c
bad_inode.c iget: introduce a function to register iget failure 2008-02-07 08:42:26 -08:00
binfmt_aout.c fs/binfmt_aout.c: use printk_ratelimit() 2008-04-29 08:06:04 -07:00
binfmt_elf.c Remove last traces of a.out support from ELF loader. 2008-06-16 10:20:57 -07:00
binfmt_elf_fdpic.c nommu: fix ksize() abuse 2008-06-06 11:29:13 -07:00
binfmt_em86.c binfmt_misc.c: avoid potential kernel stack overflow 2008-04-29 08:06:04 -07:00
binfmt_flat.c nommu: fix ksize() abuse 2008-06-06 11:29:13 -07:00
binfmt_misc.c binfmt_misc.c: avoid potential kernel stack overflow 2008-04-29 08:06:04 -07:00
binfmt_script.c binfmt_misc.c: avoid potential kernel stack overflow 2008-04-29 08:06:04 -07:00
binfmt_som.c [PATCH] sanitize handling of shared descriptor tables in failing execve() 2008-04-25 09:23:53 -04:00
bio-integrity.c block: integrity checkpatch cleanups 2008-07-03 13:21:13 +02:00
bio.c Add bvec_merge_data to handle stacked devices and ->merge_bvec() 2008-07-03 13:21:15 +02:00
block_dev.c [PATCH] fix cgroup-inflicted breakage in block_dev.c 2008-06-23 08:30:55 -04:00
buffer.c Merge branch 'generic-ipi' into generic-ipi-for-linus 2008-07-15 21:55:59 +02:00
char_dev.c Remove the lock_kernel() call from chrdev_open() 2008-06-20 14:05:53 -06:00
compat.c [PATCH] get rid of leak in compat_execve() 2008-05-16 17:23:05 -04:00
compat_binfmt_elf.c x86: compat_binfmt_elf 2008-01-30 13:31:46 +01:00
compat_ioctl.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/holtmann/bluetooth-2.6 2008-07-19 00:30:39 -07:00
dcache.c [patch 2/3] vfs: dcache cleanups 2008-06-23 13:07:00 -04:00
dcookies.c d_path: Make d_path() use a struct path 2008-02-14 21:17:09 -08:00
direct-io.c Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user 2008-02-05 09:44:13 -08:00
dnotify.c [PATCH] split linux/file.h 2008-05-01 13:08:16 -04:00
dquot.c quota: don't call sync_fs() from vfs_quota_off() when there's no quota turn off 2008-05-13 08:02:23 -07:00
drop_caches.c vfs: skip inodes without pages to free in drop_pagecache_sb() 2008-04-29 08:06:05 -07:00
eventfd.c [PATCH] sanitize anon_inode_getfd() 2008-05-01 13:08:50 -04:00
eventpoll.c [PATCH] sanitize anon_inode_getfd() 2008-05-01 13:08:50 -04:00
exec.c exec: fix stack excutability without PT_GNU_STACK 2008-07-10 13:25:43 -07:00
fcntl.c Call fasync() functions without the BKL 2008-07-02 15:06:28 -06:00
fifo.c
file.c [PATCH] avoid multiplication overflows and signedness issues for max_fds 2008-05-16 17:22:52 -04:00
file_table.c [PATCH] split linux/file.h 2008-05-01 13:08:16 -04:00
filesystems.c
fs-writeback.c VFS: export sync_sb_inodes 2008-07-14 19:10:52 +03:00
generic_acl.c
inode.c VFS: fix unused variable warning 2008-05-06 13:13:37 -07:00
inotify.c inotify: remove debug code 2008-02-06 10:41:07 -08:00
inotify_user.c Remove duplicated unlikely() in IS_ERR() 2008-04-29 08:06:25 -07:00
internal.h [PATCH] move a bunch of declarations to fs/internal.h 2008-04-21 23:11:01 -04:00
ioctl.c make vfs_ioctl() static 2008-04-29 08:06:00 -07:00
ioprio.c
Kconfig Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 2008-07-17 10:55:51 -07:00
Kconfig.binfmt frv: don't offer BINFMT_FLAT 2008-06-06 11:29:08 -07:00
libfs.c add kernel-doc for simple_read_from_buffer and memory_read_from_buffer 2008-07-04 10:40:07 -07:00
locks.c [patch 4/4] flock: remove unused fields from file_lock_operations 2008-06-23 11:52:30 -04:00
Makefile Merge branch 'for_linus' of git://git.infradead.org/~dedekind/ubifs-2.6 2008-07-16 15:02:57 -07:00
mbcache.c vfs: fix possible deadlock in ext2, ext3, ext4 when using xattrs 2008-04-15 19:35:41 -07:00
mpage.c vfs: add hooks for ext4's delayed allocation support 2008-07-11 19:27:31 -04:00
namei.c [patch 3/4] vfs: fix ERR_PTR abuse in generic_readlink 2008-06-23 11:52:30 -04:00
namespace.c LSM/SELinux: show LSM mount options in /proc/mounts 2008-07-14 15:02:05 +10:00
nfsctl.c Introduce path_put() 2008-02-14 21:13:33 -08:00
no-block.c
open.c security: filesystem capabilities: fix fragile setuid fixup code 2008-07-04 10:40:08 -07:00
pipe.c [patch 1/4] vfs: path_{get,put}() cleanups 2008-06-23 11:52:29 -04:00
pnode.c [patch 7/7] vfs: mountinfo: show dominating group id 2008-04-23 00:05:09 -04:00
pnode.h [patch 7/7] vfs: mountinfo: show dominating group id 2008-04-23 00:05:09 -04:00
posix_acl.c
quota.c quota: quota core changes for quotaon on remount 2008-04-28 08:58:33 -07:00
quota_v1.c quota: do not allow setting of quota limits to too high values 2008-04-28 08:58:32 -07:00
quota_v2.c quota: le*_add_cpu conversion 2008-04-30 08:29:51 -07:00
read_write.c Remove BKL from remote_llseek v2 2008-07-02 15:06:27 -06:00
read_write.h
readdir.c
select.c Fix performance regression on lmbench select benchmark 2008-06-22 12:23:15 -07:00
seq_file.c [patch 2/7] vfs: mountinfo: add seq_file_root() 2008-04-23 00:04:38 -04:00
signalfd.c [PATCH] sanitize anon_inode_getfd() 2008-05-01 13:08:50 -04:00
splice.c splice: fix generic_file_splice_read() race with page invalidation 2008-07-04 09:52:14 +02:00
stack.c
stat.c Introduce path_put() 2008-02-14 21:13:33 -08:00
super.c make __put_super() static 2008-04-29 08:06:00 -07:00
sync.c vfs: fix unconditional write_super() call in file_fsync() 2008-04-29 08:06:06 -07:00
timerfd.c [PATCH] sanitize anon_inode_getfd() 2008-05-01 13:08:50 -04:00
utimes.c [patch for 2.6.26 4/4] vfs: utimensat(): fix write access check for futimens() 2008-06-23 08:43:52 -04:00
xattr.c xattr: add missing consts to function arguments 2008-04-29 08:06:06 -07:00
xattr_acl.c