This effectively reverts 859a3f86 ("ACPI: simplify
acpi_pci_irq_add_prt() API") and d9efae36 ("ACPI: simplify
acpi_pci_irq_del_prt() API").

The reason is to disentangle these routines from the struct pci_bus.
We want to be able to add the _PRT before the struct pci_bus
exists, and delete the _PRT after we've removed the pci_bus.
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Signed-off-by: NTaku Izumi <izumi.taku@jp.fujitsu.com>

It supports both PCI root bus and PCI bus under PCI bridge.
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>

It is main portion of pci_rescan_bus().

Separate it out and prepare to use it for PCI root bus hot add later.
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>

Use rcu_read_lock_sched / rcu_read_unlock_sched / synchronize_sched
instead of rcu_read_lock / rcu_read_unlock / synchronize_rcu.

This is an optimization. The RCU-protected region is very small, so
there will be no latency problems if we disable preempt in this region.

So we use rcu_read_lock_sched / rcu_read_unlock_sched that translates
to preempt_disable / preempt_disable. It is smaller (and supposedly
faster) than preemptible rcu_read_lock / rcu_read_unlock.
Signed-off-by: NMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This patch introduces new barrier pair light_mb() and heavy_mb() for
percpu rw semaphores.

This patch fixes a bug in percpu-rw-semaphores where a barrier was
missing in percpu_up_write.

This patch improves performance on the read path of
percpu-rw-semaphores: on non-x86 cpus, there was a smp_mb() in
percpu_up_read. This patch changes it to a compiler barrier and removes
the "#if defined(X86) ..." condition.

From: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: NMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

rb_erase_augmented() is a static function annotated with
__always_inline.  This causes a compile failure when attempting to use
the rbtree implementation as a library (e.g.  kvm tool):

  rbtree_augmented.h:125:24: error: expected `=', `,', `;', `asm' or `__attribute__' before `void'

Include linux/compiler.h in rbtree_augmented.h so that the __always_inline
macro is resolved correctly.
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Cc: Pekka Enberg <penberg@kernel.org>
Reviewed-by: NMichel Lespinasse <walken@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The __used attribute prevents gcc from eliminating
unnecessary, otherwise optimized away, metadata for
debugging logging messages.

Remove the __used attribute.
Signed-off-by: NJoe Perches <joe@perches.com>
Acked-by: NJason Baron <jbaron@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

We will not map partial pages, so need to make sure memblock
allocation will not allocate those bytes out.

Also we will use for_each_mem_pfn_range() to loop to map memory
range to keep them consistent.
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/CAE9FiQVZirvaBMFYRfXMmWEcHbKSicQEHz4VAwUv0xFCk51ZNw@mail.gmail.comAcked-by: NJacob Shin <jacob.shin@amd.com>
Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@vger.kernel.org>

The perf_cpu_notifier() macro invokes smp_processor_id()
multiple times. Optimize it by using a local variable.
Signed-off-by: NSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Reviewed-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: peterz@infradead.org
Cc: acme@ghostprotocols.net
Link: http://lkml.kernel.org/r/20121016075817.3572.76733.stgit@srivatsabhat.in.ibm.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

The CPU_STARTING notifiers are supposed to be run with irqs
disabled. But the perf_cpu_notifier() macro invokes them without
doing that. Fix it.
Signed-off-by: NSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Reviewed-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: peterz@infradead.org
Cc: acme@ghostprotocols.net
Link: http://lkml.kernel.org/r/20121016075809.3572.47848.stgit@srivatsabhat.in.ibm.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

This patch add platform data for MUIC device to initialize register
on probe() call because it should unmask interrupt mask register
and initialize some register related to MUIC device.
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NMyungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>

Add a bit TCPI_OPT_SYN_DATA (32) to the socket option TCP_INFO:tcpi_options.
It's set if the data in SYN (sent or received) is acked by SYN-ACK. Server or
client application can use this information to check Fast Open success rate.
Signed-off-by: NYuchung Cheng <ycheng@google.com>
Acked-by: NNeal Cardwell <ncardwell@google.com>
Acked-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

With this change now individual drivers can use standard cable
names as below:
static const char *arizona_cable[] = {
    extcon_cable_name[EXTCON_USB],
    extcon_cable_name[EXTCON_USB_HOST],
    "CUSTOM_CABLE"
    NULL,
}
Signed-off-by: Nanish kumar <anish198519851985@gmail.com>
Signed-off-by: NMyungJoo Ham <myungjoo.ham@samsung.com>

free_pid_ns() operates in a recursive fashion:

free_pid_ns(parent)
  put_pid_ns(parent)
    kref_put(&ns->kref, free_pid_ns);
      free_pid_ns

thus if there was a huge nesting of namespaces the userspace may trigger
avalanche calling of free_pid_ns leading to kernel stack exhausting and a
panic eventually.

This patch turns the recursion into an iterative loop.

Based on a patch by Andrew Vagin.

[akpm@linux-foundation.org: export put_pid_ns() to modules]
Signed-off-by: NCyrill Gorcunov <gorcunov@openvz.org>
Cc: Andrew Vagin <avagin@openvz.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Commit 5ab1c309 ("coredump: pass siginfo_t* to do_coredump() and
below, not merely signr") added siginfo_t to linux/coredump.h but forgot
to include asm/siginfo.h.  This breaks the build for UML/i386.  (And any
other arch where asm/siginfo.h is not magically preincluded...)

  In file included from arch/x86/um/elfcore.c:2:0: include/linux/coredump.h:15:25: error: unknown type name 'siginfo_t'
  make[1]: *** [arch/x86/um/elfcore.o] Error 1
Signed-off-by: NRichard Weinberger <richard@nod.at>
Cc: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Amerigo Wang <amwang@redhat.com>
Cc: "Jonathan M. Foote" <jmfoote@cert.org>
Cc: Roland McGrath <roland@hack.frob.com>
Cc: Pedro Alves <palves@redhat.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This correctly sizes it as 64 bit on ARM but leaves it as unsigned
long on x86 (therefore no intended change on x86).

The long and ulong guest handles are now unused (and a bit dangerous)
so remove them.
Acked-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: NIan Campbell <ian.campbell@citrix.com>
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>

Signed-off-by: NIan Campbell <ian.campbell@citrix.com>
Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>

Some datasheets use a different unit to specify the channel scale than what IIO
expects it to be. This patch adds two helper macros which allow to convert units
commonly used in datasheets to IIO units:

 * acceleration: g -> meter / second**2
 * angular velocity: degree (/ second) -> rad (/ second)

This makes it much more convenient to specify and also easier to verify a
channel's scale attribute.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NJonathan Cameron <jic23@kernel.org>

drivers/of/irq.c:195:57: warning: restricted __be32 degrades to integer
drivers/of/irq.c:196:51: warning: restricted __be32 degrades to integer
drivers/of/irq.c:199:57: warning: restricted __be32 degrades to integer
drivers/of/irq.c:201:58: warning: restricted __be32 degrades to integer
drivers/of/irq.c:470:37: warning: incorrect type in assignment (different modifiers)
drivers/of/irq.c:470:37:    expected int ( *[usertype] irq_init_cb )( ... )
drivers/of/irq.c:470:37:    got void const *const data
drivers/of/irq.c:96:5: error: symbol 'of_irq_map_raw' redeclared with different type (originally declared at include/linux/of_irq.h:61) - incompatible argument 2 (different base types)

drivers/of/of_pci_irq.c:91:40: warning: incorrect type in argument 2 (different base types)
drivers/of/of_pci_irq.c:91:40:    expected unsigned int const [usertype] *intspec
drivers/of/of_pci_irq.c:91:40:    got restricted __be32 *<noident>
drivers/of/of_pci_irq.c:91:53: warning: incorrect type in argument 4 (different base types)
drivers/of/of_pci_irq.c:91:53:    expected unsigned int const [usertype] *addr
drivers/of/of_pci_irq.c:91:53:    got restricted __be32 *<noident>
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NRob Herring <rob.herring@calxeda.com>

drivers/of/address.c:66:29: warning: incorrect type in argument 1 (different base types)
drivers/of/address.c:66:29:    expected restricted __be32 const [usertype] *cell
drivers/of/address.c:66:29:    got unsigned int [usertype] *addr
drivers/of/address.c:87:32: warning: incorrect type in argument 1 (different base types)
drivers/of/address.c:87:32:    expected restricted __be32 const [usertype] *cell
drivers/of/address.c:87:32:    got unsigned int [usertype] *addr
drivers/of/address.c:91:30: warning: incorrect type in assignment (different base types)
drivers/of/address.c:91:30:    expected unsigned int [unsigned] [usertype] <noident>
drivers/of/address.c:91:30:    got restricted __be32 [usertype] <noident>
drivers/of/address.c:92:22: warning: incorrect type in assignment (different base types)
drivers/of/address.c:92:22:    expected unsigned int [unsigned] [usertype] <noident>
drivers/of/address.c:92:22:    got restricted __be32 [usertype] <noident>
drivers/of/address.c:147:35: warning: incorrect type in argument 1 (different base types)
drivers/of/address.c:147:35:    expected restricted __be32 const [usertype] *addr
drivers/of/address.c:147:35:    got unsigned int [usertype] *addr
drivers/of/address.c:157:34: warning: incorrect type in argument 1 (different base types)
drivers/of/address.c:157:34:    expected restricted __be32 const [usertype] *cell
drivers/of/address.c:157:34:    got unsigned int [usertype] *
drivers/of/address.c:256:29: warning: restricted __be32 degrades to integer
drivers/of/address.c:256:36: warning: restricted __be32 degrades to integer
drivers/of/address.c:262:34: warning: incorrect type in argument 1 (different base types)
drivers/of/address.c:262:34:    expected restricted __be32 const [usertype] *cell
drivers/of/address.c:262:34:    got unsigned int [usertype] *
drivers/of/address.c:372:41: warning: incorrect type in argument 1 (different base types)
drivers/of/address.c:372:41:    expected restricted __be32 const [usertype] *cell
drivers/of/address.c:372:41:    got unsigned int [usertype] *addr
drivers/of/address.c:395:53: warning: incorrect type in argument 2 (different base types)
drivers/of/address.c:395:53:    expected restricted __be32 const [usertype] *addr
drivers/of/address.c:395:53:    got unsigned int [usertype] *addr
drivers/of/address.c:443:50: warning: incorrect type in argument 2 (different base types)
drivers/of/address.c:443:50:    expected restricted __be32 const [usertype] *addr
drivers/of/address.c:443:50:    got unsigned int *<noident>
drivers/of/address.c:455:49: warning: incorrect type in argument 1 (different base types)
drivers/of/address.c:455:49:    expected restricted __be32 const [usertype] *cell
drivers/of/address.c:455:49:    got unsigned int *<noident>
drivers/of/address.c:480:60: warning: incorrect type in argument 2 (different base types)
drivers/of/address.c:480:60:    expected restricted __be32 const [usertype] *addr
drivers/of/address.c:480:60:    got unsigned int *<noident>
drivers/of/address.c:412:5: warning: symbol '__of_translate_address' was not declared. Should it be static?
drivers/of/address.c:520:14: error: symbol 'of_get_address' redeclared with different type (originally declared at include/linux/of_address.h:22) - different base types
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NRob Herring <rob.herring@calxeda.com>

Fixes build error on s3c6400_defconfig, introduced by commit
06455bbc, "dt/s3c64xx/spi: Use
of_get_child_by_name to get a named child".

drivers/spi/spi-s3c64xx.c: In function 's3c64xx_get_slave_ctrldata':
drivers/spi/spi-s3c64xx.c:838:2: error: implicit declaration of function
    'of_get_child_by_name' [-Werror=implicit-function-declaration]
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NRob Herring <rob.herring@calxeda.com>

There are no users of this macro anymore in the kernel tree, so finally
delete it.
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NMichael Kerrisk <mtk.manpages@gmail.com>
Acked-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: NDave Jones <davej@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Make uapi/asm-generic/kvm_para.h non-empty by addition of a comment to stop
the patch program from deleting it when it creates it.

Then delete empty arch-specific uapi/asm/kvm_para.h files and tell the Kbuild
files to use the generic instead.

Should this perhaps instead be a #warning or #error that the facility is
unsupported on this arch?
Signed-off-by: NDavid Howells <dhowells@redhat.com>
cc: Arnd Bergmann <arnd@arndb.de>
cc: Avi Kivity <avi@redhat.com>
cc: Marcelo Tosatti <mtosatti@redhat.com>
cc: kvm@vger.kernel.org

Remove non-UAPI Kbuild files that have become empty as a result of UAPI
disintegration.  They used to have only header-y lines in them and those have
now moved to the Kbuild files in the corresponding uapi/ directories.

Possibly these should not be removed but rather have a comment inserted to say
they are intentionally left blank.  This would make it easier to add generated
header lines in future without having to restore the infrastructure.

Note that at this point not all the UAPI disintegration parts have been merged,
so it is likely that more empty Kbuild files will turn up.

It is probably necessary to make the files non-empty to prevent the patch
program from automatically deleting them when it reduces them to nothing.
Signed-off-by: NDavid Howells <dhowells@redhat.com>

Remove empty conditionals from include/linux/Kbuild as the contents, with new
conditionals, have moved to include/uapi/linux/Kbuild.
Signed-off-by: NDavid Howells <dhowells@redhat.com>

uapi/linux/irqnr.h was emitted by the UAPI disintegration script as an empty
file because the parent linux/irqnr.h had no UAPI stuff in it, despite being
marked with "header-y".

Unfortunately, the patch program deletes the empty file when applying a kernel
patch.

It's not clear why this file is part of the UAPI at all.  Looking in:

	/usr/include/linux/irqnr.h

there's nothing there but a header reinclusion guard and a comment.

So just stick a comment in there as a placeholder.

Without this, if the kernel is fabricated from, say, a tarball and a patch, you
can get this error when building x86_64 or usermode Linux (and probably
others):

include/linux/irqnr.h:4:30: fatal error: uapi/linux/irqnr.h: No such file or directory
Reported-by: NRandy Dunlap <rdunlap@xenotime.net>
Reported-by: NAlessandro Suardi <alessandro.suardi@gmail.com>
Signed-off-by: NDavid Howells <dhowells@redhat.com>
cc: Randy Dunlap <rdunlap@xenotime.net>
cc: Alessandro Suardi <alessandro.suardi@gmail.com>

Delete soon-obsolete e-mail address.
Signed-off-by: NAaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

It seems I accidentally switched the guard on linux/elf-fdpic.h from #ifdef
__KERNEL__ to #ifndef __KERNEL__ when attempting to expand the guarded region
to cover the elf_fdpic_params struct when doing the UAPI split - with the
result that the struct became unavailable to kernel code.

Move incorrectly guarded bits back to the kernelspace header.

Whilst we're at it, the __KERNEL__ guards can be deleted as they're no longer
necessary.
Reported-by: NFengguang Wu <fengguang.wu@intel.com>
Reported-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NDavid Howells <dhowells@redhat.com>
cc: Fengguang Wu <fengguang.wu@intel.com>
cc: Lars-Peter Clausen <lars@metafoo.de>
cc: uclinux-dev@uclinux.org
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

	Had not been used for more than a decade and half; it used
to be a part of (in-kernel) ->select() API and it has been pining
for fjords since 2.1.23pre1.  This is an ex-parrot...
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

There are some bits of linux/fs.h which are only used within the kernel and
shouldn't be in the UAPI.  Move these from uapi/linux/fs.h into linux/fs.h.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Avoid situation when we are on associate state in mac80211 and
on disassociate state in cfg80211. This can results on crash
during modules unload (like showed on this thread:
http://marc.info/?t=134373976300001&r=1&w=2) and possibly other
problems.
Reported-by: NPedro Francisco <pedrogfrancisco@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: NStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

Signed-off-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NMichael Kerrisk <mtk.manpages@gmail.com>
Acked-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: NDave Jones <davej@redhat.com>

Signed-off-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NMichael Kerrisk <mtk.manpages@gmail.com>
Acked-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: NDave Jones <davej@redhat.com>

It seems that was linux/blk_types.h incorrectly exported to fix up some missing
bits required by the exported parts of linux/fs.h (READ, WRITE, READA, etc.).

So unexport linux/blk_types.h and unexport the relevant bits of linux/fs.h.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
cc: Jens Axboe <jaxboe@fusionio.com>
cc: Tejun Heo <tj@kernel.org>
cc: Al Viro <viro@ZenIV.linux.org.uk>

Unexport part of linux/ppp-comp.h as userspace can't make use of that bit.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
cc: Paul Mackerras <paulus@samba.org>
cc: David Miller <davem@davemloft.net>

In the common case where a name is much smaller than PATH_MAX, an extra
allocation for struct filename is unnecessary. Before allocating a
separate one, try to embed the struct filename inside the buffer first. If
it turns out that that's not long enough, then fall back to allocating a
separate struct filename and redoing the copy.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Keep a pointer to the audit_names "slot" in struct filename.

Have all of the audit_inode callers pass a struct filename ponter to
audit_inode instead of a string pointer. If the aname field is already
populated, then we can skip walking the list altogether and just use it
directly.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

...and fix up the callers. For do_file_open_root, just declare a
struct filename on the stack and fill out the .name field. For
do_filp_open, make it also take a struct filename pointer, and fix up its
callers to call it appropriately.

For filp_open, add a variant that takes a struct filename pointer and turn
filp_open into a wrapper around it.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>