Commit Graph

60 Commits

Author SHA1 Message Date
Toshi Kani 308b135e4f hpwdt: Fix kdump issue in hpwdt
kdump can be interrupted by watchdog timer when the timer is left
activated on the crash kernel. Changed the hpwdt driver to disable
watchdog timer at boot-time. This assures that watchdog timer is
disabled until /dev/watchdog is opened, and prevents watchdog timer
to be left running on the crash kernel.

Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Tested-by: Lisa Mitchell <lisa.mitchell@hp.com>
Signed-off-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable <stable@vger.kernel.org>
2012-09-10 17:28:08 +02:00
Mingarelli, Thomas a089361cf5 watchdog: hpwdt: Unregister NMI events on exit.
This patch is to unregister for NMI events upon exit. Also we are now
making the default setting for allow_kdump enabled.

Signed-off-by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2012-06-28 20:40:31 +02:00
Wim Van Sebroeck 5ce9c371c7 watchdog: Use module_pci_driver
This patch converts the PCI watchdog drivers so that they use the
module_pci_driver() macro. This makes the code smaller and simpler.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: Thomas Mingarelli <thomas.mingarelli@hp.com>
Cc: Marc Vertes <marc.vertes@sigfox.com>
2012-05-23 16:23:53 +02:00
Linus Torvalds 5ec29e3149 Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core locking updates from Ingo Molnar:
 "This update:

   - extends and simplifies x86 NMI callback handling code to enhance
     and fix the HP hw-watchdog driver

   - simplifies the x86 NMI callback handling code to fix a kmemcheck
     bug.

   - enhances the hung-task debugger"

* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/nmi: Fix the type of the nmiaction.flags field
  x86/nmi: Fix page faults by nmiaction if kmemcheck is enabled
  x86/nmi: Add new NMI queues to deal with IO_CHK and SERR
  watchdog, hpwdt: Remove priority option for NMI callback
  hung task debugging: Inject NMI when hung and going to panic
2012-05-21 19:25:14 -07:00
Mingarelli, Thomas d08c9a33b4 hpwdt: Only BYTE reads/writes to WD Timer port 0x72
This patch is to correct the use of the iLO port 0x72 usage.
The port 0x72 is a byte size write/read and hpwdt is currently
writing a WORD.

Signed-off by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2012-04-26 14:38:07 +02:00
Don Zickus 553222f3e8 x86/nmi: Add new NMI queues to deal with IO_CHK and SERR
In discussions with Thomas Mingarelli about hpwdt, he explained
to me some issues they were some when using their virtual NMI
button to test the hpwdt driver.

It turns out the virtual NMI button used on HP's machines do no
send unknown NMIs but instead send IO_CHK NMIs.  The way the
kernel code is written, the hpwdt driver can not register itself
against that type of NMI and therefore can not successfully
capture system information before panic'ing.

To solve this I created two new NMI queues to allow driver to
register against the IO_CHK and SERR NMIs.  Or in the hpwdt all
three (if you include unknown NMIs too).

The change is straightforward and just mimics what the unknown
NMI does.

Reported-and-tested-by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/1333051877-15755-3-git-send-email-dzickus@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-04-25 12:43:34 +02:00
Don Zickus 09ee101436 watchdog, hpwdt: Remove priority option for NMI callback
The NMI_UNKNOWN bucket only allows for one function to register
to it. The reason for that is because only functions which can
not determine if the NMI belongs to them or not should register
and would like to assume/swallow any NMI they see.

As a result it doesn't make sense to let more than one function
like this register.  In fact, letting a second function fail
allows us to know that more than one function is going to
swallow NMIs on the current system. This is better than silently
being ignored.

Therefore hpwdt's priority mechanism doesn't make sense any
more.  They will be always first on the NMI_UNKNOWN queue, if
they register.

Removing this parameter cleans up the code and simplifies things
for the next patch which changes how nmis are registered.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Thomas Mingarelli <thomas.mingarelli@hp.com>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/1333051877-15755-2-git-send-email-dzickus@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-04-25 12:43:33 +02:00
Wim Van Sebroeck 86a1e1896c watchdog: nowayout is bool
nowayout is actually a boolean value.
So make it bool for all watchdog device drivers.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2012-03-27 20:06:02 +02:00
Joe Perches 27c766aaac watchdog: Use pr_<fmt> and pr_<level>
Use the current logging styles.

Make sure all output has a prefix.
Add missing newlines.
Remove now unnecessary PFX, NAME, and miscellaneous other #defines.
Coalesce formats.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2012-03-27 19:59:26 +02:00
Maxim Uvarov 97d2a10d58 watchdog: hpwdt: clean up set_memory_x call for 32 bit
1. address has to be page aligned.
2. set_memory_x uses page size argument, not size.
Bug causes with following commit:
	commit da28179b4e90dda56912ee825c7eaa62fc103797
	Author: Mingarelli, Thomas <Thomas.Mingarelli@hp.com>
	Date:   Mon Nov 7 10:59:00 2011 +0100

     watchdog: hpwdt: Changes to handle NX secure bit in 32bit path

    commit e67d668e14 upstream.

    This patch makes use of the set_memory_x() kernel API in order
    to make necessary BIOS calls to source NMIs.

Signed-off-by: Maxim Uvarov <maxim.uvarov@oracle.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable <stable@vger.kernel.org>
2012-02-28 17:08:36 +01:00
Mingarelli, Thomas e67d668e14 watchdog: hpwdt: Changes to handle NX secure bit in 32bit path
This patch makes use of the set_memory_x() kernel API in order
to make necessary BIOS calls to source NMIs.

This is needed for SLES11 SP2 and the latest upstream kernel as it appears
the NX Execute Disable has grown in its control.

Signed-off by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable@kernel.org
2011-12-26 15:14:38 +01:00
Ingo Molnar d48b0e1737 x86, nmi, drivers: Fix nmi splitup build bug
nmi.c needs an #include <linux/mca.h>:

 arch/x86/kernel/nmi.c: In function ‘unknown_nmi_error’:
 arch/x86/kernel/nmi.c:286:6: error: ‘MCA_bus’ undeclared (first use in this function)
 arch/x86/kernel/nmi.c:286:6: note: each undeclared identifier is reported only once for each function it appears in

Another one is the hpwdt driver:

 drivers/watchdog/hpwdt.c:507:9: error: ‘NMI_DONE’ undeclared (first use in this function)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-10-10 06:57:21 +02:00
Don Zickus 9c48f1c629 x86, nmi: Wire up NMI handlers to new routines
Just convert all the files that have an nmi handler to the new routines.
Most of it is straight forward conversion.  A couple of places needed some
tweaking like kgdb which separates the debug notifier from the nmi handler
and mce removes a call to notify_die.

[Thanks to Ying for finding out the history behind that mce call

https://lkml.org/lkml/2010/5/27/114

And Boris responding that he would like to remove that call because of it

https://lkml.org/lkml/2011/9/21/163]

The things that get converted are the registeration/unregistration routines
and the nmi handler itself has its args changed along with code removal
to check which list it is on (most are on one NMI list except for kgdb
which has both an NMI routine and an NMI Unknown routine).

Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Corey Minyard <minyard@acm.org>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Corey Minyard <minyard@acm.org>
Cc: Jack Steiner <steiner@sgi.com>
Link: http://lkml.kernel.org/r/1317409584-23662-4-git-send-email-dzickus@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-10-10 06:56:57 +02:00
Naga Chumbalkar dbc018eca3 watchdog: hpwdt: prevent multiple "NMI occurred" messages
On platforms with no iCRU support don't print two, (possibly conflicting),
"NMI occurred" messages when the firmware is unable to source the NMI.

Please note that one of the enhancements to the v1.3.0 hpwdt driver is to panic and allow
KDUMP to succeed even on NMIs that are unknown to the platform firmware.

Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Reviewed-by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2011-09-20 14:24:54 +02:00
Thomas Mingarelli 5efc7a6222 watchdog: hpwdt: add next gen HP servers
This patch is required to enable hpwdt to work on next generation HP servers
with iLO.

Signed-off-by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2011-07-28 08:00:56 +00:00
Wim Van Sebroeck 4562f53940 watchdog: convert to DEFINE_PCI_DEVICE_TABLE
Convert static struct pci_device_id *[] to static DEFINE_PCI_DEVICE_TABLE tables.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2011-03-15 16:02:22 +00:00
Axel Lin b77b708868 watchdog: hpwdt: eliminate section mismatch warning
hpwdt_init_nmi_decoding() is called in hpwdt_init_one error handling,
thus remove the  __devexit annotation of hpwdt_exit_nmi_decoding().

This patch fixes below warning:

WARNING: drivers/watchdog/hpwdt.o(.devinit.text+0x36f): Section mismatch in reference from the function hpwdt_init_one() to the function .devexit.text:hpwdt_exit_nmi_decoding()
The function __devinit hpwdt_init_one() references
a function __devexit hpwdt_exit_nmi_decoding().
This is often seen when error handling in the init function
uses functionality in the exit path.
The fix is often to remove the __devexit annotation of
hpwdt_exit_nmi_decoding() so it may be used outside an exit section.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2011-03-14 10:44:31 +00:00
Don Zickus 673a6092ce x86: Convert some devices to use DIE_NMIUNKNOWN
They are a handful of places in the code that register a die_notifier
as a catch all in case no claims the NMI.  Unfortunately, they trigger
on events like DIE_NMI and DIE_NMI_IPI, which depending on when they
registered may collide with other handlers that have the ability to
determine if the NMI is theirs or not.

The function unknown_nmi_error() makes one last effort to walk the
die_chain when no one else has claimed the NMI before spitting out
messages that the NMI is unknown.

This is a better spot for these devices to execute any code without
colliding with the other handlers.

The two drivers modified are only compiled on x86 arches I believe, so
they shouldn't be affected by other arches that may not have
DIE_NMIUNKNOWN defined.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Russ Anderson <rja@sgi.com>
Cc: Corey Minyard <minyard@acm.org>
Cc: openipmi-developer@lists.sourceforge.net
Cc: dann frazier <dannf@hp.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1294348732-15030-3-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-07 15:08:52 +01:00
Don Zickus 4a7863cc2e x86, nmi_watchdog: Remove ARCH_HAS_NMI_WATCHDOG and rely on CONFIG_HARDLOCKUP_DETECTOR
The x86 arch has shifted its use of the nmi_watchdog from a
local implementation to the global one provide by
kernel/watchdog.c.  This shift has caused a whole bunch of
compile problems under different config options.  I attempt to
simplify things with the patch below.

In order to simplify things, I had to come to terms with the
meaning of two terms ARCH_HAS_NMI_WATCHDOG and
CONFIG_HARDLOCKUP_DETECTOR.  Basically they mean the same thing,
the former on a local level and the latter on a global level.

With the old x86 nmi watchdog gone, there is no need to rely on
defining the ARCH_HAS_NMI_WATCHDOG variable because it doesn't
make sense any more.  x86 will now use the global
implementation.

The changes below do a few things.  First it changes the few
places that relied on ARCH_HAS_NMI_WATCHDOG to use
CONFIG_X86_LOCAL_APIC (the former was an alias for the latter
anyway, so nothing unusual here).  Those pieces of code were
relying more on local apic functionality the nmi watchdog
functionality, so the change should make sense.

Second, I removed the x86 implementation of
touch_nmi_watchdog().  It isn't need now, instead x86 will rely
on kernel/watchdog.c's implementation.

Third, I removed the #define ARCH_HAS_NMI_WATCHDOG itself from
x86.  And tweaked the include/linux/nmi.h file to tell users to
look for an externally defined touch_nmi_watchdog in the case of
ARCH_HAS_NMI_WATCHDOG _or_ CONFIG_HARDLOCKUP_DETECTOR. This
changes removes some of the ugliness in that file.

Finally, I added a Kconfig dependency for
CONFIG_HARDLOCKUP_DETECTOR that said you can't have
ARCH_HAS_NMI_WATCHDOG _and_ CONFIG_HARDLOCKUP_DETECTOR.  You can
only have one nmi_watchdog.

Tested with
ARCH=i386: allnoconfig, defconfig, allyesconfig, (various broken
configs) ARCH=x86_64: allnoconfig, defconfig, allyesconfig,
(various broken configs)

Hopefully, after this patch I won't get any more compile broken
emails. :-)

v3:
  changed a couple of 'linux/nmi.h' -> 'asm/nmi.h' to pick-up correct function
  prototypes when CONFIG_HARDLOCKUP_DETECTOR is not set.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: fweisbec@gmail.com
LKML-Reference: <1293044403-14117-1-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-12-22 22:15:32 +01:00
Don Zickus 072b198a4a x86, nmi_watchdog: Remove all stub function calls from old nmi_watchdog
Now that the bulk of the old nmi_watchdog is gone, remove all
the stub variables and hooks associated with it.

This touches lots of files mainly because of how the io_apic
nmi_watchdog was implemented.  Now that the io_apic nmi_watchdog
is forever gone, remove all its fingers.

Most of this code was not being exercised by virtue of
nmi_watchdog != NMI_IO_APIC, so there shouldn't be anything to
risky here.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: fweisbec@gmail.com
Cc: gorcunov@openvz.org
LKML-Reference: <1289578944-28564-3-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-18 09:08:23 +01:00
dann frazier 86ded1f35d watchdog: hpwdt (12/12): Make NMI decoding a compile-time option
hpwdt is quite functional without the NMI decoding feature.
This change lets users disable the NMI portion at compile-time
via the new HPWDT_NMI_DECODING config option.

Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-13 20:54:53 +00:00
dann frazier 2ec7ed67dc watchdog: hpwdt (11/12): move NMI-decoding init and exit to seperate functions
Move NMI-decoding initialisation and exit code to seperate functions so that
we can ifdef-out parts of it in the future.

Also, this is for a device, so let's use dev_info instead of printk.
    
Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-13 20:54:52 +00:00
dann frazier 34572b29dd watchdog: hpwdt (10/12): Use "decoding" instead of "sourcing"
The term "decoding" more clearly explains what hpwdt is doing. It isn't
just finding the source of the interrupt, but rather aids in decoding what
the interrupt means.

Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-13 20:54:50 +00:00
dann frazier 243066bad7 watchdog: hpwdt (9/12): hpwdt_pretimeout reorganization
Reorganize this function to remove excess indentation and highlight
the single return code. (No functional change).

Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-13 20:54:48 +00:00
dann frazier aae67f3602 watchdog: hpwdt (8/12): implement WDIOC_GETTIMELEFT
Let applications check the amount of time left before the watchdog will fire.

Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-13 20:54:46 +00:00
dann frazier 6f681c2eab watchdog: hpwdt (7/12): allow full range of timer values supported by hardware
The hpwdt timer is a 16 bit value with 128ms resolution.
Let applications use this entire range.

Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-13 20:54:42 +00:00
dann frazier e802e32d2b watchdog: hpwdt (6/12): Introduce SECS_TO_TICKS() macro
Define a macro to convert from seconds to timer ticks.

Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-13 20:54:39 +00:00
dann frazier 6b7f3d5321 watchdog: hpwdt (5/12): Make x86 assembly ifdef guard more strict
The 32-bit assembly is guarded by an #ifndef CONFIG_X86_64. Kconfig prevents
us from building this driver on !X86, so that happens to suffice - but we
should really lock it down to #ifdef CONFIG_X86_32.

Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-13 20:54:37 +00:00
dann frazier 36e3ff44ce watchdog: hpwdt (4/12): Despecificate driver from iLO2
This driver supports both iLO2 and iLO3, but our user-visible strings
currently only reference iLO2. Let's just call it "iLO2+" to avoid having
to update strings for each iLO generation. This driver doesn't support
iLO ASICs prior to iLO2, but that is sufficiently explained in Kconfig.

Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-13 20:54:35 +00:00
dann frazier 923410d0bf watchdog: hpwdt (3/12): Group NMI sourcing specific items together
* Group together includes specific to NMI sourcing
* Group defines only used by NMI sourcing together
* Group declarations specific to NMI sourcing together

This gives a clean seperation of watchdog specific items and
NMI sourcing specific items (which is needed for making it
possible to build hpwdt without the NMI functionality).

Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-13 20:54:31 +00:00
dann frazier 550d299eeb watchdog: hpwdt (2/12): Group options that affect watchdog behavior together
Reorganization only.

Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-13 20:54:27 +00:00
dann frazier a52e6d181d watchdog: hpwdt (1/12): clean-up include-files.
* remove unnecessary includes
* We use a spinlock, but lacked the include
* We need bitops.h for test_and_set_bit/clear_bit

Signed-off-by: dann frazier <dannf@hp.com>
Acked-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-13 20:54:24 +00:00
Kulikov Vasiliy adb23631a7 watchdog: hpwdt: formatting of pointers in printk()
Use %p instead of %08x in printk().

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-08-08 18:22:44 +00:00
Linus Torvalds 14e71e4fb9 Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
  [WATCHDOG] hpwdt - fix lower timeout limit
  [WATCHDOG] iTCO_wdt: TCO Watchdog patch for additional Intel Cougar Point DeviceIDs
  [WATCHDOG] doc: Fix use of WDIOC_SETOPTIONS ioctl.
  [WATCHDOG] doc: watchdog simple example: don't fail on fsync()
  [WATCHDOG] set max63xx driver as ARM only
  [WATCHDOG] powerpc: pika_wdt ident cannot be const
2010-04-06 09:56:40 -07:00
Thomas Mingarelli 8ba42bd88c [WATCHDOG] hpwdt - fix lower timeout limit
[Novell Bug 581103] HP Watchdog driver has arbitrary (wrong) timeout limits.
Fix the lower timeout limit to a more appropriate value.

Signed-off-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable <stable@kernel.org>
2010-04-06 14:37:43 +00:00
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
Wim Van Sebroeck 42747d712d [WATCHDOG] watchdog_info constify
make the watchdog_info struct const where possible.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2010-03-07 10:30:57 +00:00
Tom Mingarelli 44df75353b [WATCHDOG] hpwdt: Add NMI priority option
Add a priority option so that the user can choose if we do the NMI
first or last.

Signed-off-by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2009-06-23 07:13:45 +00:00
Thomas Mingarelli 47bece87b1 [WATCHDOG] hpwdt: Add NMI sourcing
Add NMI sourcing functionality (Can only be active if nmi_watchdog is
inactive).

Signed-off-by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2009-06-18 07:32:06 +00:00
Jean Delvare e7a19c5624 dmi: Let dmi_walk() users pass private data
At the moment, dmi_walk() lacks flexibility, users can't pass data to
the callback function. Add a pointer for private data to make this
function more flexible.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Roland Dreier <rolandd@cisco.com>
2009-03-30 21:46:44 +02:00
Wim Van Sebroeck 143a2e54bf [WATCHDOG] More coding-style and trivial clean-up
Some more cleaning-up of the watchdog drivers.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2009-03-25 09:07:04 +00:00
Wim Van Sebroeck d5c26a5977 [WATCHDOG] struct file_operations should be const
Fix following warnings:
WARNING: struct file_operations should normally be const

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2009-03-25 09:06:18 +00:00
Thomas Mingarelli d8100c3abf [WATCHDOG] hpwdt.c: Add new HP BMC controller.
Add the PCI-ID for the upcoming new BMC controller for HP hardware.

Signed-off-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2009-03-25 09:04:27 +00:00
Bernhard Walle 290172e790 [WATCHDOG] hpwdt: Fix kdump when using hpwdt
When the "hpwdt" module is loaded (even if the /dev/watchdog device is not
opened), then kdump does not work. The panic kernel either does not start at
all or crash in various places.

The problem is that hpwdt_pretimeout is registered with register_die_notifier()
with the highest possible priority. Because it returns NOTIFY_STOP, the
crash_nmi_callback which is also registered with register_die_notifier()
is never executed. This causes the shutdown of other CPUs to fail.

Reverting the order is no option: The crash_nmi_callback executes HLT
and so never returns normally. Because of that, it must be executed as
last notifier, which currently is done.

So, that patch returns NOTIFY_OK to keep the crash_nmi_callback executed.

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Thomas Mingarelli <thomas.mingarelli@hp.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
2008-12-01 15:55:10 +00:00
Bernhard Walle 060264133b [WATCHDOG] hpwdt: set the mapped BIOS address space as executable
The address provided by the SMBIOS/DMI CRU information is mapped via
ioremap() in the virtual address space.  However, since the address is
executed (i.e.  call'd), we need to set that pages as executable.

Without that, I get following oops on a HP ProLiant DL385 G2
machine with BIOS from 05/29/2008 when I trigger crashdump:

    BUG: unable to handle kernel paging request at ffffc20011090c00
    IP: [<ffffc20011090c00>] 0xffffc20011090c00
    PGD 12f813067 PUD 7fe6a067 PMD 7effe067 PTE 80000000fffd3173
    Oops: 0011 [1] SMP
    last sysfs file: /sys/devices/system/cpu/cpu3/cache/index2/shared_cpu_map
    CPU 1
    Modules linked in: autofs4 ipv6 af_packet cpufreq_conservative cpufreq_userspace
     cpufreq_powersave powernow_k8 fuse loop dm_mod rtc_cmos ipmi_si sg rtc_core i2c
    _piix4 ipmi_msghandler bnx2 sr_mod container button i2c_core hpilo joydev pcspkr
     rtc_lib shpchp hpwdt cdrom pci_hotplug usbhid hid ff_memless ohci_hcd ehci_hcd
    uhci_hcd usbcore edd ext3 mbcache jbd fan ide_pci_generic serverworks ide_core p
    ata_serverworks pata_acpi cciss ata_generic libata scsi_mod dock thermal process
    or thermal_sys hwmon
    Supported: Yes
    Pid: 0, comm: swapper Not tainted 2.6.27.5-HEAD_20081111100657-default #1
    RIP: 0010:[<ffffc20011090c00>]  [<ffffc20011090c00>] 0xffffc20011090c00
    RSP: 0018:ffff88012f6f9e68  EFLAGS: 00010046
    RAX: 0000000000000d02 RBX: 0000000000000000 RCX: 0000000000000000
    RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
    RBP: ffff88012f6f9e98 R08: 666666666666660a R09: ffffffffa1006fc0
    R10: 0000000000000000 R11: ffff88012f6f3ea8 R12: ffffc20011090c00
    R13: ffff88012f6f9ee8 R14: 000000000000000e R15: 0000000000000000
    FS:  00007ff70b29a6f0(0000) GS:ffff88012f6512c0(0000) knlGS:0000000000000000
    CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
    CR2: ffffc20011090c00 CR3: 0000000000201000 CR4: 00000000000006e0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    Process swapper (pid: 0, threadinfo ffff88012f6f2000, task ffff88007fa8a1c0)
    Stack:  ffffffffa0f8502b 0000000000000002 ffffffff80738d50 0000000000000000
     0000000000000046 0000000000000046 00000000fffffffe ffffffffa0f852ec
     0000000000000000 ffffffff804ad9a6 0000000000000000 0000000000000000
    Call Trace:
    Inexact backtrace:

     <NMI>  [<ffffffffa0f8502b>] ? asminline_call+0x2b/0x55 [hpwdt]
     [<ffffffffa0f852ec>] hpwdt_pretimeout+0x3c/0xa0 [hpwdt]
     [<ffffffff804ad9a6>] ? notifier_call_chain+0x29/0x4c
     [<ffffffff802587e4>] ? notify_die+0x2d/0x32
     [<ffffffff804abbdc>] ? default_do_nmi+0x53/0x1d9
     [<ffffffff804abd90>] ? do_nmi+0x2e/0x43
     [<ffffffff804ab552>] ? nmi+0xa2/0xd0
     [<ffffffff80221ef9>] ? native_safe_halt+0x2/0x3
     <<EOE>>  [<ffffffff8021345d>] ? default_idle+0x38/0x54
     [<ffffffff8021359a>] ? c1e_idle+0x118/0x11c
     [<ffffffff8020b3b5>] ? cpu_idle+0xa9/0xf1

    Code: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff <55> 50 e8 00 00 00 00 58 48 2d 07 10 40 00 48 8b e8 58 e9 68 02
    RIP  [<ffffc20011090c00>] 0xffffc20011090c00
     RSP <ffff88012f6f9e68>
    CR2: ffffc20011090c00
    Kernel panic - not syncing: Fatal exception

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Cc: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2008-11-21 08:34:59 +00:00
Thomas Mingarelli ab4ba3cdeb [WATCHDOG] hpwdt.c kdebug support
add kdebug support for the hpwdt.c driver.

Signed-off-by: Thomas Mingarelli <Thomas.Mingarelli@hp.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2008-08-26 20:20:32 +00:00
Wim Van Sebroeck 7944d3a5a7 [WATCHDOG] more coding style clean-up's
More coding style clean-up's.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2008-08-06 20:19:41 +00:00
Wim Van Sebroeck 9e74114d96 [WATCHDOG] hpwdt.c - fix double includes
The last clean-up created 2 times the same include. delete the doubles.

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2008-08-06 12:31:52 +00:00
Wim Van Sebroeck 96e2e6fafa [WATCHDOG] Merge code clean-up's from Alan Cox.
Merge branch 'alan' of ../linux-2.6-watchdog-mm
Fixed Conflicts in the following files:
	drivers/watchdog/booke_wdt.c
	drivers/watchdog/mpc5200_wdt.c
	drivers/watchdog/sc1200wdt.c

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2008-08-06 11:58:26 +00:00
Alexey Dobriyan d667b6ddbc hpwdt: don't use static flags
Static (read: global) is potential problem.  Two threads can corrupt each
other's interrupt status, better avoid this.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Thomas Mingarelli <thomas.mingarelli@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-30 09:41:45 -07:00