Piteball/android_kernel_samsung_msm8976
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android_kernel_samsung_msm8976/fs/nfs
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Colin Cross c4bdacb9e8 freezer: add unsafe versions of freezable helpers for NFS 
NFS calls the freezable helpers with locks held, which is unsafe
and will cause lockdep warnings when 6aa9707 "lockdep: check
that no locks held at freeze time" is reapplied (it was reverted
in dbf520a).  NFS shouldn't be doing this, but it has
long-running syscalls that must hold a lock but also shouldn't
block suspend.  Until NFS freeze handling is rewritten to use a
signal to exit out of the critical section, add new *_unsafe
versions of the helpers that will not run the lockdep test when
6aa9707 is reapplied, and call them from NFS.

In practice the likley result of holding the lock while freezing
is that a second task blocked on the lock will never freeze,
aborting suspend, but it is possible to manufacture a case using
the cgroup freezer, the lock, and the suspend freezer to create
a deadlock.  Silencing the lockdep warning here will allow
problems to be found in other drivers that may have a more
serious deadlock risk, and prevent new problems from being added.

Change-Id: Ia17d32cdd013a6517bdd5759da900970a4427170
Signed-off-by: Colin Cross <ccross@android.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-07-01 15:37:43 -07:00
..
blocklayout make blkdev_put() return void 2013-05-07 02:16:31 -04:00
objlayout treewide: Fix typo in printks 2013-04-12 15:21:36 +02:00
cache_lib.c NFS: simplify and clean cache library 2013-02-15 10:43:36 -05:00
cache_lib.h NFS: simplify and clean cache library 2013-02-15 10:43:36 -05:00
callback.c nfs: allow the v4.1 callback thread to freeze 2013-04-05 17:03:52 -04:00
callback.h NFSv4.1: Clean up session draining 2012-12-06 00:30:44 +01:00
callback_proc.c NFSv4.1 Fix a pNFS session draining deadlock 2013-05-20 14:20:14 -04:00
callback_xdr.c NFSv4.1 Fix a pNFS session draining deadlock 2013-05-20 14:20:14 -04:00
client.c NFSv4.1: Set the RPC_CLNT_CREATE_INFINITE_SLOTS flag for NFSv4.1 transports 2013-04-14 12:59:28 -04:00
delegation.c nfs: remove unnecessary check for NULL inode->i_flock from nfs_delegation_claim_locks 2013-04-10 15:40:31 -04:00
delegation.h NFSv4: Fix CB_RECALL_ANY to only return delegations that are not in use 2013-04-05 17:03:57 -04:00
dir.c NFSv4.1: Enable open-by-filehandle 2013-03-25 12:04:11 -04:00
direct.c nfs: fix page dirtying in NFS DIO read codepath 2012-12-12 12:56:19 -05:00
dns_resolve.c SUNRPC: remove "cache_request" argument in sunrpc_cache_pipe_upcall() function 2013-02-15 10:43:47 -05:00
dns_resolve.h
file.c NFS: Ensure that NFS file unlock waits for readahead to complete 2013-04-08 22:12:42 -04:00
fscache-index.c
fscache.c NFS4: Open files for fscaching 2012-12-20 22:19:42 +00:00
fscache.h NFS: Provide stub nfs_fscache_wait_on_invalidate() for when CONFIG_NFS_FSCACHE=n 2012-12-21 08:06:48 -08:00
getroot.c nfs: remove kfree() redundant null checks 2013-02-17 15:27:21 -05:00
idmap.c NFSv4: Fix the string length returned by the idmapper 2013-03-20 16:45:16 -04:00
inode.c freezer: add unsafe versions of freezable helpers for NFS 2013-07-01 15:37:43 -07:00
internal.h NFS: Add functionality to allow waiting on all outstanding reads to complete 2013-04-08 22:12:33 -04:00
iostat.h
Kconfig NFSv4.1: Remove the dependency on CONFIG_EXPERIMENTAL 2012-10-03 10:54:50 -07:00
Makefile NFSv4.1: Cleanup move session slot management to fs/nfs/nfs4session.c 2012-12-06 00:30:45 +01:00
mount_clnt.c NFS: Remove the BUG_ON() in the mount code 2012-11-04 14:43:39 -05:00
namespace.c NFS: Don't silently fail setattr() requests on mountpoints 2013-01-30 17:41:04 -05:00
netns.h nfs: include NFSv4 header in netns.h 2012-10-02 08:17:02 -07:00
nfs.h NFS: Convert v4 into a module 2012-07-30 19:06:52 -04:00
nfs2super.c NFS: Convert v2 into a module 2012-07-30 19:06:41 -04:00
nfs2xdr.c nfs: Convert nfs2xdr to use kuids and kgids 2013-02-13 06:15:30 -08:00
nfs3acl.c userns: Pass a userns parameter into posix_acl_to_xattr and posix_acl_from_xattr 2012-09-18 01:01:35 -07:00
nfs3client.c NFS: Only initialize the ACL client in the v3 case 2012-07-30 19:05:54 -04:00
nfs3proc.c freezer: add unsafe versions of freezable helpers for NFS 2013-07-01 15:37:43 -07:00
nfs3super.c NFS: Convert v3 into a module 2012-07-30 19:06:46 -04:00
nfs3xdr.c nfs: Convert nfs3xdr to use kuids and kgids 2013-02-13 06:15:31 -08:00
nfs4_fs.h NFSv4.1: Ensure that we free the lock stateid on the server 2013-05-06 17:24:27 -04:00
nfs4client.c NFS: Fix SETCLIENTID fallback if GSS is not available 2013-05-23 18:50:40 -04:00
nfs4file.c new helper: file_inode(file) 2013-02-22 23:31:31 -05:00
nfs4filelayout.c NFSv4: The stateid must remain the same for replayed RPC calls 2013-03-25 12:04:10 -04:00
nfs4filelayout.h NFS4.1 Fix data server connection race 2013-05-08 17:19:32 -04:00
nfs4filelayoutdev.c NFS4.1 Fix data server connection race 2013-05-08 17:19:32 -04:00
nfs4getroot.c NFSv4: fs/nfs/nfs4getroot.c needs to include "internal.h" 2012-10-16 12:37:59 -04:00
nfs4namespace.c SUNRPC: Introduce rpcauth_get_pseudoflavor() 2013-03-29 15:43:07 -04:00
nfs4proc.c freezer: add unsafe versions of freezable helpers for NFS 2013-07-01 15:37:43 -07:00
nfs4renewd.c workqueue: use mod_delayed_work() instead of cancel + queue 2012-08-13 16:27:37 -07:00
nfs4session.c NFSv4.1 Fix a pNFS session draining deadlock 2013-05-20 14:20:14 -04:00
nfs4session.h NFSv4.1 Fix a pNFS session draining deadlock 2013-05-20 14:20:14 -04:00
nfs4state.c NFSv4.1 Fix a pNFS session draining deadlock 2013-05-20 14:20:14 -04:00
nfs4super.c NFS: Use server-recommended security flavor by default (NFSv3) 2013-04-04 17:01:01 -04:00
nfs4sysctl.c nfs: include nfs4_fh.h in nfs4sysctl.c 2012-10-02 08:17:03 -07:00
nfs4xdr.c NFSv4: Convert nfs41_free_stateid to use an asynchronous RPC call 2013-05-06 17:24:22 -04:00
nfsroot.c
pagelist.c NFS: Add functionality to allow waiting on all outstanding reads to complete 2013-04-08 22:12:33 -04:00
pnfs.c NFSv4: Fail I/O if the state recovery fails irrevocably 2013-03-25 12:04:10 -04:00
pnfs.h NFSv4.1: Add a helper pnfs_commit_and_return_layout 2013-03-21 10:31:21 -04:00
pnfs_dev.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
proc.c new helper: file_inode(file) 2013-02-22 23:31:31 -05:00
read.c NFS: Don't accept more reads/writes if the open context recovery failed 2013-03-25 12:04:10 -04:00
super.c NFS: Fix security flavor negotiation with legacy binary mounts 2013-05-30 16:31:34 -04:00
symlink.c
sysctl.c
unlink.c NFS: Don't allow NFS silly-renamed files to be deleted, no signal 2013-02-22 14:55:34 -05:00
write.c NFS: Don't accept more reads/writes if the open context recovery failed 2013-03-25 12:04:10 -04:00