switch hostfs_iattr to explicit unsigned short

It's shared between kernel-compiled hostfs_kern and userland-compiled
hostfs_user (it's uml stuff).  Use explicit type instead of playing
silly buggers with mode_t.  It's not a userland API per se; it interacts
between code compiled with types same as for host kernel and, directly
linked to it, code talking to libc.  Both sides come from the same
kernel source...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch miscdevice to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch spufs guts to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

init/initramfs.c: should use umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch may_mknod() to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

should_remove_suid(): inode->i_mode is umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch securityfs_create_file() to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch security_path_chmod() to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch sys_chmod()/sys_fchmod()/sys_fchmodat() to umode_t

SYSCALLx magic should take care of things, according to Linus...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sysctl: use umode_t for table permissions

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

get rid of open-coded S_ISREG(), etc.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mqueue: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch is_sxid() to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch inode_init_owner() to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs: propagate umode_t, misc bits

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

autofs4: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

hfsplus: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

hfs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

cifs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fat: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

ntfs: propagate umode_t

same story as with isofs and udf...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

isofs: propagate umode_t

situation with mount options is the same as for udf

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

udf: propagate umode_t

note re mount options: fmask and dmask are explicitly truncated to 12bit,
UDF_INVALID_MODE just needs to be guaranteed to differ from any such value.
And umask is used only in &= with umode_t, so we ignore other bits anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fuse: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

pohmelfs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

shmem, ramfs: propagate umode_t, open-coded S_ISREG

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

logfs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

ubifs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

ncpfs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

hugetlbfs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

exofs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

nilfs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sunrpc: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

affs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

cgroup: propagate mode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

infiniband: umode_t noise, including open-coded S_ISDIR()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sysfs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

usbfs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

hypfs: umode_t noise and properly spelled S_ISDIR/S_ISREG

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

ocfs2: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

dlmfs: use inode_init_owner()

don't open-code it...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

9p: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

omfs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

reiserfs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

xfs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

sysv: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

ufs: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

minix: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

ext4: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

ext3: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

ext2: propagate umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

9p: don't bother with unixmode2p9mode() for link() and symlink()

Pass perm to v9fs_vfs_mkspecial() instead of passing mode;
calculate in caller when done for mknod(), use known value for link()
and symlink().  As the result, we avoid a bit of work *and* stop
mixing mode_t with P9_DMLINK.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

kill ecryptfs_create_underlying_file()

it's a just a wrapper for vfs_create()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

configfs: convert to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch devtmpfs to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch debugfs to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch sysfs_chmod_file() to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch procfs to umode_t use

both proc_dir_entry ->mode and populating functions

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch ->is_visible() to returning umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch sysfs attr->mode to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch device_get_devnode() and ->devnode() to umode_t *

both callers of device_get_devnode() are only interested in lower 16bits
and nobody tries to return anything wider than 16bit anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

hugetlbfs: switch to inode_init_owner()

... rather than open-coding it

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch ->mknod() to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch ->create() to umode_t

vfs_create() ignores everything outside of 16bit subset of its
mode argument; switching it to umode_t is obviously equivalent
and it's the only caller of the method

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch vfs_mkdir() and ->mkdir() to umode_t

vfs_mkdir() gets int, but immediately drops everything that might not
fit into umode_t and that's the only caller of ->mkdir()...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch sys_mknodat(2) to umode_t

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: fix the rest of sget() races

unfortunately, just checking MS_BORN after having grabbed ->s_umount in
sget() is not enough; places that pick superblock from a list and
grab s_umount shared need the same check in addition to checking for
->s_root; otherwise three-way race between failing mount, sget() and
such list-walker can leave us with list-walker coming *second*, when
temporary active ref grabbed by sget() (to be dropped when sget()
notices that original mount has failed by checking MS_BORN) has
lead to deactivate_locked_super() from failing ->mount() *not* doing
->kill_sb() and just releasing ->s_umount.  Once sget() gets through
and notices that MS_BORN had never been set it will drop the active
ref and fs will be shut down and kicked out of all lists, but it's
too late for something like sync_supers().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: new helper - vfs_ustat()

... and bury user_get_super()/statfs_by_dentry() - they are
purely internal now.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: live vfsmounts never have NULL ->mnt_sb

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: for usbfs, etc. internal vfsmounts ->mnt_sb->s_root == ->mnt_root

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

get rid of timer in kern/acct.c

... and clean it up a bit, while we are at it

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: pipe.c is really non-modular

... so no exitcalls there.  Not much would work if pipe(2) would stop
working, after all...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: fix the stupidity with i_dentry in inode destructors

Seeing that just about every destructor got that INIT_LIST_HEAD() copied into
it, there is no point whatsoever keeping this INIT_LIST_HEAD in inode_init_once();
the cost of taking it into inode_init_always() will be negligible for pipes
and sockets and negative for everything else.  Not to mention the removal of
boilerplate code from ->destroy_inode() instances...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: mnt_drop_write_file()

new helper (wrapper around mnt_drop_write()) to be used in pair with
mnt_want_write_file().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

constify seq_file stuff

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: make do_kern_mount() static

the only user outside of fs/namespace.c has died

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: convert fs_supers to hlist

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

make nfs_follow_remote_path() handle ERR_PTR() passed as root_mnt

... rather than duplicating that in callers

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: kill ->mnt_devname use in afs printks

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

btrfs, nfs, apparmor: don't pull mnt_namespace.h for no reason...

it's not needed anymore; we used to, back when we had to do
mount_subtree() by hand, complete with put_mnt_ns() in it.
No more...  Apparmor didn't need it since the __d_path() fix.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

tomoyo: stop including hell knows what

tomoyo/realpath.c needs exactly one include - that of common.h.  It pulls
everything the thing needs, without doing ridiculous garbage such as trying
to include ../../fs/internal.h.  If that alone doesn't scream "layering
violation", I don't know what does; and these days it's all for nothing,
since it fortunately does not use any symbols defined in there...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: dentry_reset_mounted() doesn't use vfsmount argument

lose it

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

unexport put_mnt_ns(), make create_mnt_ns() static outright

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: add missing parens in pnode.h macros

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: more mnt_parent cleanups

a) mount --move is checking that ->mnt_parent is non-NULL before
looking if that parent happens to be shared; ->mnt_parent is never
NULL and it's not even an misspelled !mnt_has_parent()

b) pivot_root open-codes is_path_reachable(), poorly.

c) so does path_is_under(), while we are at it.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: new internal helper: mnt_has_parent(mnt)

vfsmounts have ->mnt_parent pointing either to a different vfsmount
or to itself; it's never NULL and termination condition in loops
traversing the tree towards root is mnt == mnt->mnt_parent.  At least
one place (see the next patch) is confused about what's going on;
let's add an explicit helper checking it right way and use it in
all places where we need it.  Not that there had been too many,
but...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

vfs: kill pointless helpers in namespace.c

mnt_{inc,dec}_count() is not cleaner than doing the corresponding
mnt_add_count() directly and mnt_set_count() is not used at all.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

new helpers: fh_{want,drop}_write()

A bunch of places in nfsd does mnt_{want,drop}_write on vfsmount of
export of given fhandle.  Switched to obvious inlined helpers...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

switch a bunch of places to mnt_want_write_file()

it's both faster (in case when file has been opened for write) and cleaner.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

trim fs/internal.h

some stuff in there can actually become static; some belongs to pnode.h
as it's a private interface between namespace.c and pnode.c...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

pull manipulations of rpc_cred inside alloc_nfs_open_context()

No need to duplicate them in both callers; make it return
ERR_PTR(-ENOMEM) on allocation failure instead of NULL and
it'll be able to report rpc_lookup_cred() failures just
fine.  Callers are much happier that way...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Revert "rtc: Disable the alarm in the hardware"

This reverts commit c0afabd3d553c521e003779c127143ffde55a16f.

It causes failures on Toshiba laptops - instead of disabling the alarm,
it actually seems to enable it on the affected laptops, resulting in
(for example) the laptop powering on automatically five minutes after
shutdown.

There's a patch for it that appears to work for at least some people,
but it's too late to play around with this, so revert for now and try
again in the next merge window.

See for example

http://bugs.debian.org/652869

Reported-and-bisected-by: Andreas Friedrich <afrie@gmx.net> (Toshiba Tecra)
Reported-by: Antonio-M. Corbi Bellot <antonio.corbi@ua.es> (Toshiba Portege R500)
Reported-by: Marco Santos <marco.santos@waynext.com> (Toshiba Portege Z830)
Reported-by: Christophe Vu-Brugier <cvubrugier@yahoo.fr> (Toshiba Portege R830)
Cc: Jonathan Nieder <jrnieder@gmail.com>
Requested-by: John Stultz <john.stultz@linaro.org>
Cc: stable@kernel.org # for the versions that applied this
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

hung_task: fix false positive during vfork

vfork parent uninterruptibly and unkillably waits for its child to
exec/exit. This wait is of unbounded length. Ignore such waits
in the hung_task detector.

Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Reported-by: Sasha Levin <levinsasha928@gmail.com>
LKML-Reference: <1325344394.28904.43.camel@lappy>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: John Kacur <jkacur@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

security: Fix security_old_inode_init_security() when CONFIG_SECURITY is not set

Commit 1e39f384bb01 ("evm: fix build problems") makes the stub version
of security_old_inode_init_security() return 0 when CONFIG_SECURITY is
not set.

But that makes callers such as reiserfs_security_init() assume that
security_old_inode_init_security() has set name, value, and len
arguments properly - but security_old_inode_init_security() left them
uninitialized which then results in interesting failures.

Revert security_old_inode_init_security() to the old behavior of
returning EOPNOTSUPP since both callers (reiserfs and ocfs2) handle this
just fine.

[ Also fixed the S_PRIVATE(inode) case of the actual non-stub
  security_old_inode_init_security() function to return EOPNOTSUPP
  for the same reason, as pointed out by Mimi Zohar.

  It got incorrectly changed to match the new function in commit
  fb88c2b6cbb1: "evm: fix security/security_old_init_security return
  code".   - Linus ]

Reported-by: Jorge Bastos <mysql.jorge@decimal.pt>
Acked-by: James Morris <jmorris@namei.org>
Acked-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drm/radeon/kms/atom: fix possible segfault in pm setup

If we end up with no power states, don't look up
current vddc.

fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=44130

agd5f: fix patch formatting

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

Merge branch 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6

* 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6:
  dt/device: Fix auxdata matching to handle entries without a name override

Merge git://git./linux/kernel/git/davem/net

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  netfilter: ctnetlink: fix timeout calculation
  ipvs: try also real server with port 0 in backup server
  skge: restore rx multicast filter on resume and after config changes
  mlx4_en: nullify cq->vector field when closing completion queue

Merge branch 'fix/asoc' of git://git./linux/kernel/git/tiwai/sound

* 'fix/asoc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ASoC: wm8776: add missing break in sample size switch

gspca: Fix falling back to lower isoc alt settings

The current gspca core code has a regression where it no longer properly
falls back to lower alt settings when there is not enough bandwidth.

This causes many iso based usb-1 cameras to not work when plugged into a
usb2 hub or a sandybridge chipset motherboard!

This patch fixes this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

futex: Fix uninterruptible loop due to gate_area

It was found (by Sasha) that if you use a futex located in the gate
area we get stuck in an uninterruptible infinite loop, much like the
ZERO_PAGE issue.

While looking at this problem, PeterZ realized you'll get into similar
trouble when hitting any install_special_pages() mapping.  And are there
still drivers setting up their own special mmaps without page->mapping,
and without special VM or pte flags to make get_user_pages fail?

In most cases, if page->mapping is NULL, we do not need to retry at all:
Linus points out that even /proc/sys/vm/drop_caches poses no problem,
because it ends up using remove_mapping(), which takes care not to
interfere when the page reference count is raised.

But there is still one case which does need a retry: if memory pressure
called shmem_writepage in between get_user_pages_fast dropping page
table lock and our acquiring page lock, then the page gets switched from
filecache to swapcache (and ->mapping set to NULL) whatever the refcount.
Fault it back in to get the page->mapping needed for key->shared.inode.

Reported-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>