(Resending as I am not seeing it in -next so maybe it got lost)

mm: memory hotplug: Check if pages are correctly reserved on a per-section basis

It is expected that memory being brought online is PageReserved
similar to what happens when the page allocator is being brought up.
Memory is onlined in "memory blocks" which consist of one or more
sections. Unfortunately, the code that verifies PageReserved is
currently assuming that the memmap backing all these pages is virtually
contiguous which is only the case when CONFIG_SPARSEMEM_VMEMMAP is set.
As a result, memory hot-add is failing on those configurations with
the message;

kernel: section number XXX page number 256 not reserved, was it already online?

This patch updates the PageReserved check to lookup struct page once
per section to guarantee the correct struct page is being checked.

[Check pages within sections properly: rientjes@google.com]
[original patch by: nfont@linux.vnet.ibm.com]
Signed-off-by: NMel Gorman <mgorman@suse.de>
Acked-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Tested-by: NNathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This reverts commit 54f23eb7.

Turns out this patch is wrong, another correct one will follow it.
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The stable@kernel.org email address has been replaced with the
stable@vger.kernel.org mailing list.  Change the stable kernel rules to
reference the new list instead of the semi-defunct email alias.

CC: <stable@kernel.org>
CC: <stable@vger.kernel.org>
Signed-off-by: NJosh Boyer <jwboyer@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Dynamic debug recently added support for netdev_printk.  It uses
__netdev_printk() to support this functionality.  However, when CONFIG_NET
is not set, we get the following error:

lib/built-in.o: In function `__dynamic_netdev_dbg':
(.text+0x9fda): undefined reference to `__netdev_printk'

Fix this by making the call to netdev_printk() contingent upon CONFIG_NET.
 We could have fixed this by defining netdev_printk() to a 'no-op' in the
!CONFIG_NET case.  However, this is not consistent with how the networking
layer uses netdev_printk.  For example, CONFIG_NET is not set,
netdev_printk() does not have a 'no-op' definition defined.
Signed-off-by: NJason Baron <jbaron@redhat.com>
Acked-by: NRandy Dunlap <rdunlap@xenotime.net>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NAndrew Morton <akpm@google.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

We were using KERN_CONT to combine messages with their prefix.  However,
KERN_CONT is not smp safe, in the sense that it can interleave messages.
This interleaving can result in printks coming out at the wrong loglevel.
With the high frequency of printks that dynamic debug can produce this is
not desirable.

So make dynamic_emit_prefix() fill a char buf[64] instead of doing a
printk directly.  If we enable printing out of function, module, line, or
pid info, they are placed in this 64 byte buffer.  In my testing 64 bytes
was enough size to fulfill all requests.  Even if it's not, we can match
up the printk itself to see where it's from, so to me this is no big deal.

[akpm@linux-foundation.org: convert dangerous macro to C]
Signed-off-by: NJason Baron <jbaron@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: NAndrew Morton <akpm@google.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The num_enabled accounting isn't actually used anywhere - remove them.
Signed-off-by: NJason Baron <jbaron@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: NAndrew Morton <akpm@google.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Replace the repetitive struct _ddebug descriptor definitions with a new
DECLARE_DYNAMIC_DEBUG_META_DATA(name, fmt) macro.

[akpm@linux-foundation.org: s/DECLARE/DEFINE/]
Signed-off-by: NJason Baron <jbaron@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: NAndrew Morton <akpm@google.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

To support >32-bit physical addresses for UIO_MEM_PHYS type we need to
extend the width of 'addr' in struct uio_mem.  Numerous platforms like
embedded PPC, ARM, and X86 have support for systems with larger physical
address than logical.

Since 'addr' may contain a physical, logical, or virtual address the
easiest solution is to just change the type to 'phys_addr_t' which
should always be greater than or equal to the sizeof(void *) such that
it can properly hold any of the address types.

For physical address we can support up to a 44-bit physical address on a
typical 32-bit system as we utilize remap_pfn_range() for the mapping of
the memory region and pfn's are represnted by shifting the address by
the page size (typically 4k).
Signed-off-by: NKai Jiang <Kai.Jiang@freescale.com>
Signed-off-by: NMinghuan Lian <Minghuan.Lian@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
Signed-off-by: NHans J. Koch <hjk@hansjkoch.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

"sysfs: use rb-tree for inode number lookup" added a new printk which
causes a new compile warning on s390 (and few other architectures):

fs/sysfs/dir.c: In function 'sysfs_link_sibling':
fs/sysfs/dir.c:63:4: warning: format '%lx' expects argument of type
  'long unsigned int', but argument 2 has type 'ino_t' [-Wform

Add an explicit unsigned long cast since ino_t is an unsigned long on
most architectures.

Cc: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

When DEBUG_DRIVER is activated, be verbose and explicitly state when a
device<->driver match was rejected by the probe-function of the driver.
Now all code-paths report what is currently happening which helps
debugging, because you don't have to remember that no printout means
the match is rejected (and then you still don't know if it was because
of ENODEV or ENXIO).
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The check to ensure that pages of recently added memory sections are correctly
marked as reserved before trying to online the memory is broken.  The request
to online the memory fails with the following:

kernel: section number XXX page number 256 not reserved, was it already online?

This updates the page reservation checking to check the pages of each memory
section of the memory block being onlined individually.
Signed-off-by: NNathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The sysfs memory probe interface allows unaligned regions
to be added:

# echo 0xffffff > /sys/devices/system/memory/probe

# cat /proc/iomem
00ffffff-01fffffe : System RAM
01ffffff-02fffffe : System RAM
02ffffff-03fffffe : System RAM
03ffffff-04fffffe : System RAM
04ffffff-05fffffe : System RAM

Return -EINVAL instead of creating these bad regions.
Signed-off-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

This patch can remove the messy code file
Documentation/zh_CN/SumitChecklist. Of course, i will also fix this
matter and proofread it again and then submit it again.
Signed-off-by: NHarry Wei <harryxiyou@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

compared to the most powerful and already existing helper (namely
platform_device_register_resndata) this allows to specify a dma_mask.
To make eventual extensions later more easy, a struct holding the used
information is created instead of passing the information by function
parameters.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The driver model documentation was added to the kernel tree before
struct class was added to <linux/device.h>. Hence this patch that
updates the paragraph about struct class in
Documentation/driver-model/binding.txt.
Signed-off-by: NBart Van Assche <bvanassche@acm.org>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Several drivers use device_create_file() where device.groups should be
used instead. This patch documents that and also removes the comments
about device classes since these should not be used in new code in the
way documented until now in Documentation/driver-model/device.txt.
Signed-off-by: NBart Van Assche <bvanassche@acm.org>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

kobject_uevent() uses a multicast socket and should ignore
if one of listeners cannot handle messages or nobody is
listening at all.

Easily reproducible when a process in system is cloned
with CLONE_NEWNET flag.

(See also http://article.gmane.org/gmane.linux.kernel.device-mapper.dm-crypt/5256)
Signed-off-by: NMilan Broz <mbroz@redhat.com>
Acked-by: NKay Sievers <kay.sievers@vrfy.org>
Cc: stable <stable@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Previously, netif_dbg() was using dynamic_dev_dbg() to perform
the underlying printk. Fix it to use __netdev_printk(), instead.

Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: NJason Baron <jbaron@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Previously, if dynamic debug was enabled netdev_dbg() was using
dynamic_dev_dbg() to print out the underlying msg. Fix this by making
sure netdev_dbg() uses __netdev_printk().

Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: NJason Baron <jbaron@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Add a maintainers entry for dynamic debug. Hopefully nobody
will object to me as maintainer...
Signed-off-by: NJason Baron <jbaron@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Remove no longer used dynamic debug control variables. The
definitions were removed a while ago, but we forgot to clean
up the extern references.
Signed-off-by: NJason Baron <jbaron@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Add pr_fmt(fmt) with __func__.
Converts "ddebug:" prefix to "dynamic_debug:".

Most likely the if (verbose) outputs could
also be converted from pr_info to pr_debug.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NJason Baron <jbaron@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Multiple printks with KERN_CONT can be interleaved by
other printks.  Reduce the likelihood of that interleaving
by consolidating multiple calls to printk.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NJason Baron <jbaron@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Adding dynamic_dev_dbg duplicated prefix output.
Consolidate that output to a single routine.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NJason Baron <jbaron@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Unlike dynamic_pr_debug, dynamic uses of dev_dbg can not
currently add task_pid/KBUILD_MODNAME/__func__/__LINE__
to selected debug output.

Add a new function similar to dynamic_pr_debug to
optionally emit these prefixes.

Cc: Aloisio Almeida <aloisio.almeida@openbossa.org>
Noticed-by: NAloisio Almeida <aloisio.almeida@openbossa.org>
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NJason Baron <jbaron@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Only ML7213/ML7223(Bus-n) has this register.
Currently,this driver doesn't care register "FUNCSEL" in suspend/resume.
This patch saves/restores FUNCSEL register only when the device is ML7213 or
ML7223(Bus-n).
Signed-off-by: NTomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

If id_entry is available then it is used. However if we remove first the
driver followed by the device, then the id_entry is pointing to driver's
memory which is long gone.
Since id->name and plat->name are equal there is no point in
distinguishing them.

Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Remove the __devinitconst to fix the section mismatch.

WARNING: drivers/uio/built-in.o(.data+0x2e8): Section mismatch in
reference from the variable uio_pdrv_genirq to the variable
.devinit.rodata:uio_of_genirq_match
The variable uio_pdrv_genirq references
the variable __devinitconst uio_of_genirq_match
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the
variable:
*driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one,
*_console
Signed-off-by: NWanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Remove one *goto* label in uio.c.
Signed-off-by: NWanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: N"Hans J. Koch" <hjk@hansjkoch.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The spin_lock in uio_pci_generic.c is only used in the interrupt
handler, which cannot be executed twice at the same time.
That makes the lock rather pointless. This patch removes it.

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Chris Wright <chrisw@redhat.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Anthony Foiani <anthony.foiani@gmail.com>
Reported-by: NAnthony Foiani <anthony.foiani@gmail.com>
Reported-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NHans J. Koch <hjk@hansjkoch.de>
Acked-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

sysfs: use rb-tree for inode number lookup

This patch makes sysfs use red-black tree for inode number lookup.
Together with a previous patch to use red-black tree for name lookup,
this patch makes all sysfs lookups to have O(log n) complexity.
Signed-off-by: NMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

sysfs: remove s_sibling hacks

s_sibling was used for three different purposes:
1) as a linked list of entries in the directory
2) as a linked list of entries to be deleted
3) as a pointer to "struct completion"

This patch removes the hack and introduces new union u which
holds pointers for cases 2) and 3).

This change is needed for the following patch that removes s_sibling at all
and replaces it with a rb tree.
Signed-off-by: NMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

sysfs: use rb-tree for name lookups

Use red-black tree for name lookups.
Signed-off-by: NMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

sysfs: count subdirectories

This patch introduces a subdirectory counter for each sysfs directory.

Without the patch, sysfs_refresh_inode would walk all entries of the directory
to calculate the number of subdirectories.

This patch improves time of "ls -la /sys/block" when there are 10000 block
devices from 9 seconds to 0.19 seconds.
Signed-off-by: NMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Although it is expected nowadays that every new sysfs attribute is
documented under Documentation/ABI, this is not yet mentioned in the
kernel documentation. This patch adds a note in the sysfs
documentation about that requirement.
Signed-off-by: NBart Van Assche <bvanassche@acm.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The file is fs/debugfs/inode.c but the comment says it is file.c.
This patch can fix this little mistake.
Signed-off-by: NHarry Wei <harryxiyou@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf tools: Add group event scheduling option to perf record/stat
  MAINTAINERS: Fix list of perf events source files
  perf tools: Fix build against newer glibc
  perf tools: Fix error handling of unknown events
  perf evlist: Fix missing event name init for default event
  perf list: Fix exit value