Commit Graph

323211 Commits

Author SHA1 Message Date
Heiko Carstens
d1b0d842c4 s390/mm: rename addressing_mode to s390_user_mode
Renaming the globally visible variable "user_mode" to "addressing_mode" in
order to fix a name clash was not a good idea. (Commit 37fe1d73 "s390/mm:
rename user_mode variable to addressing_mode")
Looking at the code after a couple of weeks one thinks: addressing mode of
what?
So rename the variable again. This time to s390_user_mode. Which hopefully
makes more sense.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:05 +02:00
Stefan Weinhuber
46e8894786 s390/partitions: make partition detection independent from DASD ioctls
In some usage scenarios it is desireable to work with disk images or
virtualized DASD devices. One problem that prevents such applications
is the partition detection in ibm.c. Currently it works only for
devices that support the BIODASDINFO2 ioctl, in other words, it only
works for devices that belong to the DASD device driver.

The information gained from the BIODASDINFO2 ioctl is only for a small
set of legacy cases abolutely necessary. All current VOL1, LNX1 and
CMS1 type of disk labels can be interpreted correctly without this
information, as long as the generic HDIO_GETGEO ioctl works and
provides a correct disk geometry.

This patch makes the ibm.c partition detection as independent as
possible from the BIODASDINFO2 ioctl. Only the following two cases are
still restricted to real DASDs:
- An FBA DASD, or LDL formatted ECKD DASD without any disk label.
- An old style LNX1 label (without large volume support) on a disk
  with inconsistent device geometry.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:05 +02:00
Heiko Carstens
3d5787c997 s390/mm: change default addressing mode
Change the default addressing mode so that user space runs in primary space
and the kernel runs in home space.
In addition remove the "switch_amode" kernel parameter so all users who
already specified they want the new default behaviour will stay in the
"switched" mode instead of in the opposite they intended.
If there is a need to switch addressing modes, this can be done with the
"user_mode" kernel parameter: user_mode=home

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:04 +02:00
Heiko Carstens
c5e3acd666 s390/smp: avoid concurrent write to sigp status field
When a sigp instruction is issued it may store a status. This status is
currently stored in a per cpu field of the target cpu.
If multiple cpus issue a sigp instruction with the same target cpu
and a status is stored the result is not necessarily as expected.

Currently this is not an issue:
- on cpu hotplug no sigps, except "restart" and "sense" are sent to the
  target cpu.
- on external call we don't look at the status if it is stored
- on sense running the condition code "status stored" is sufficient to
  tell if a cpu is running or not

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:04 +02:00
Heiko Carstens
fbf3c54239 s390/processor: use ARRAY_SIZE instead of hard coded value
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:03 +02:00
Heiko Carstens
6668022c7b s390/cache: add cpu cache information to /proc/cpuinfo
Add a line for each cpu cache to /proc/cpuinfo.
Since we only have information of private cpu caches in sysfs we
add a line for each cpu cache in /proc/cpuinfo which will also
contain information about shared caches.

For a z196 machine /proc/cpuinfo now looks like:

vendor_id       : IBM/S390
bogomips per cpu: 14367.00
features        : esan3 zarch stfle msa ldisp eimm dfp etf3eh highgprs
cache0          : level=1 type=Data scope=Private size=64K line_size=256 associativity=4
cache1          : level=1 type=Instruction scope=Private size=128K line_size=256 associativity=8
cache2          : level=2 type=Unified scope=Private size=1536K line_size=256 associativity=12
cache3          : level=3 type=Unified scope=Shared size=24576K line_size=256 associativity=12
cache4          : level=4 type=Unified scope=Shared size=196608K line_size=256 associativity=24
processor 0: version = FF,  identification = 000123,  machine = 2817
processor 1: version = FF,  identification = 100123,  machine = 2817
processor 2: version = FF,  identification = 200123,  machine = 2817
processor 3: version = FF,  identification = 200123,  machine = 2817

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:03 +02:00
Martin Schwidefsky
d35339a42d s390: add support for transactional memory
Allow user-space processes to use transactional execution (TX).
If the TX facility is available user space programs can use
transactions for fine-grained serialization based on the data
objects that are referenced during a transaction. This is
useful for lockless data structures and speculative compiler
optimizations.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:02 +02:00
Jan Glauber
e4b8b3f33f s390: add support for runtime instrumentation
Allow user-space threads to use runtime instrumentation (RI). To enable RI
for a thread there is a new s390 specific system call, sys_s390_runtime_instr,
that takes as parameter a realtime signal number. If the RI facility is
available the system call sets up a control block for the calling thread with
the appropriate permissions for the thread to modify the control block.

The user-space thread can then use the store and modify RI instructions to
alter the control block and start/stop the instrumentation via RION/RIOFF.

If the user specified program buffer runs full RI triggers an external
interrupt. The external interrupt is translated to a real-time signal that
is delivered to the thread that enabled RI on that CPU. The number of
the real-time signal is the number specified in the RI system call. So,
user-space can select any available real-time signal number in case the
application itself uses real-time signals for other purposes.

The kernel saves the RI control blocks on task switch only if the running
thread was enabled for RI. Therefore, the performance impact on task switch
should be negligible if RI is not used.

RI is only enabled for user-space mode and is disabled for the supervisor
state.

Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:02 +02:00
Sebastian Ott
0d804b2073 s390/scm_block: force cluster writes
Force writes to Storage Class Memory (SCM) to be in done in clusters.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:01 +02:00
Sebastian Ott
f30664e2c8 s390: add scm block driver
Block device driver for Storage Class Memory (SCM). This driver
provides a block device interface for each available SCM increment.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:01 +02:00
Sebastian Ott
2e73c2cf78 s390/eadm_sch: add support for irq statistics
Add support for EADM interrupt statistics in /proc/interrupts.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:00 +02:00
Sebastian Ott
eadb86ab80 s390/cio: add eadm subchannel driver
This driver allows usage of EADM subchannels. EADM subchannels
act as a communication vehicle for SCM increments.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:45:00 +02:00
Sebastian Ott
40ff4cc066 s390: add scm notification
Detect an scm change notification in store event information.
Update affected scm devices and notify their drivers.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:59 +02:00
Sebastian Ott
1d1c8f78be s390: add scm bus driver
Bus driver to manage Storage Class Memory.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:59 +02:00
Sebastian Ott
184b08afb5 s390/chsc: implement store SCM information
chsc_scm_info will be used to detect all available increments of
storage class memory.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:58 +02:00
Sebastian Ott
d2fc439b99 s390: add eadm related structures
Add structures to be used by the eadm subchannel driver.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:57 +02:00
Sebastian Ott
382b736635 s390: add eadm facility bits
Add the eadm facility bits to the css characteristics and move
them to a new header.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:57 +02:00
Sebastian Ott
01c5e6dc11 s390/css: export css_sched_sch_todo
Allow subchannel drivers build as a module to schedule subchannel work.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:56 +02:00
Holger Dengler
1e2076f452 s390/zcrypt: Add support for CEX4 crypto card
New zcrypt module supports IBM CryptoExpress 4 cards.

Signed-off-by: Holger Dengler <hd@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:56 +02:00
Holger Dengler
5e55a488c8 s390/zcrypt: Separate msgtype implementation from card modules.
Msgtype implementations are now separated from card specific modules
and can be dynamically registered. Existing msgtype implementations
are restructured in modules.

Signed-off-by: Holger Dengler <hd@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:55 +02:00
Holger Dengler
b26bd9413c s390/ap: Add functiton facility information as AP device attribute.
Add the function facility information as new ap_device and sysfs
attribute. Also make the number of requests in device
queue and in device driver queue accessible in sysfs.

Reviewed-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>
Signed-off-by: Holger Dengler <hd@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:55 +02:00
Holger Dengler
7501455051 s390/ap: configuration information exploitation
Query AP configuration information. Improve performance of AP bus
scans by skipping AP device probing, if the AP deviec is not
configured.

Reviewed-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>
Signed-off-by: Holger Dengler <hd@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:54 +02:00
Heiko Carstens
48a8ca03f8 s390/kexec: move machine_crash_shutdown() to machine_kexec.c
machine_crash_shutdown() was the only function in crash.c.
So move the function and delete one file.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:54 +02:00
Heiko Carstens
1c725922dd s390/cpu hotplug: mask out CPU_TASKS_FROZEN in cu hotplug notifiers
Unify all our cpu hotplug notifiers to mask out the CPU_TASKS_FROZEN
bit, so we don't have to add all the *_FROZEN variant cases to the
notifiers.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:53 +02:00
Heiko Carstens
0d0e471b46 s390/smp: fix smp_find_processor_id() argument mismatch
For SMP and !SMP smp_find_processor_id() either takes a u16 or
an unsigned int argument. Fix this so both versions take a u16.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:53 +02:00
Heiko Carstens
7755d6b2c0 s390/cpu hotplug: use hotcpu_notifier() instead of register_cpu_notifier()
Saves a couple of lines of code.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:52 +02:00
Cornelia Huck
bdd1fc27cd s390/kvm: Improve Kconfig help text.
CONFIG_S390_GUEST determines whether virtio guest drivers are built, and
the virtio console is not enforced as default.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:52 +02:00
Jan Glauber
843c48fd0f s390/kconfig: split the s390 base menu
Split the base menu into more descriptive categories like processor,
memory, etc. and move virtualization related entries to the
Virtualization menu.
Also select KEXEC unconditionally.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:51 +02:00
Heiko Carstens
881730ad36 s390/cache: expose cpu cache topology via sysfs
Expose cpu cache topology via sysfs.
The created sysfs directory structure is compatible to what x86, ia64
and powerpc have.
On s390 we expose only information about cpu caches which are private
to a cpu via sysfs . Caches which are shared between cpus do not have
a sysfs representation.
The reason for that is that the file "shared_cpu_map" is mandatory
and only if running under LPAR it is possible to tell which cpus
share which cache. Second level hypervisors however do not and cannot
expose that information to guests.
In order to have a consistent view we made the choice to always only
expose information about private cpu caches via sysfs.

Example for a z196 cpu (cpu1 in /sys/devices/cpu):

cpu1/cache/index0/size -- 64K
cpu1/cache/index0/type -- Data
cpu1/cache/index0/level -- 1
cpu1/cache/index0/number_of_sets -- 64
cpu1/cache/index0/shared_cpu_map -- 00000000,00000002
cpu1/cache/index0/shared_cpu_list -- 1
cpu1/cache/index0/coherency_line_size -- 256
cpu1/cache/index0/ways_of_associativity -- 4
cpu1/cache/index1/size -- 128K
cpu1/cache/index1/type -- Instruction
cpu1/cache/index1/level -- 1
cpu1/cache/index1/number_of_sets -- 64
cpu1/cache/index1/shared_cpu_map -- 00000000,00000002
cpu1/cache/index1/shared_cpu_list -- 1
cpu1/cache/index1/coherency_line_size -- 256
cpu1/cache/index1/ways_of_associativity -- 8
cpu1/cache/index2/size -- 1536K
cpu1/cache/index2/type -- Unified
cpu1/cache/index2/level -- 2
cpu1/cache/index2/number_of_sets -- 512
cpu1/cache/index2/shared_cpu_map -- 00000000,00000002
cpu1/cache/index2/shared_cpu_list -- 1
cpu1/cache/index2/coherency_line_size -- 256
cpu1/cache/index2/ways_of_associativity -- 12

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:51 +02:00
Gerald Schaefer
648609e3f2 s390: enable large page support with CONFIG_DEBUG_PAGEALLOC
So far, large page support was completely disabled with
CONFIG_DEBUG_PAGEALLOC, although it would be sufficient if only the
large page kernel mapping was disabled. This patch enables large page
support with CONFIG_DEBUG_PAGEALLOC, while it prevents the large kernel
mapping in that case.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:50 +02:00
Heiko Carstens
535c611ddd s390/string: provide asm lib functions for memcpy and memcmp
Our memcpy and memcmp variants were implemented by calling the corresponding
gcc builtin variants.
However gcc is free to replace a call to __builtin_memcmp with a call to memcmp
which, when called, will result in an endless recursion within memcmp.
So let's provide asm variants and also fix the variants that are used for
uncompressing the kernel image.
In addition remove all other occurences of builtin function calls.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:50 +02:00
Heiko Carstens
68d9884dbc s390/bpf,jit: improve code generation
Make use of new immediate instructions that came with the
extended immediate and general instruction extension facilities.

Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:49 +02:00
Martin Schwidefsky
c10302efe5 s390/bpf,jit: BPF Just In Time compiler for s390
The s390 implementation of the JIT compiler for packet filter speedup.

Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-09-26 15:44:49 +02:00
Linus Torvalds
6f0f9b6b3f Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull more networking fixes from David Miller:

 1) Eric Dumazet discovered and fixed what turned out to be a family of
    bugs.  These functions were using pskb_may_pull() which might need
    to reallocate the linear SKB data buffer, but the callers were not
    expecting this possibility.  The callers have cached pointers to the
    packet header areas, and would need to reload them if we were to
    continue using pskb_may_pull().

    So they could end up reading garbage.

    It's easier to just change these RAW4/RAW6/MIP6 routines to use
    skb_header_pointer() instead of pskb_may_pull(), which won't modify
    the linear SKB data area.

 2) Dave Jone's syscall spammer caught a case where a non-TCP socket can
    call down into the TCP keepalive code.  The case basically involves
    creating a raw socket with sk_protocol == IPPROTO_TCP, then calling
    setsockopt(sock_fd, SO_KEEPALIVE, ...)

    Fixed by Eric Dumazet.

 3) Bluetooth devices do not get configured properly while being powered
    on, resulting in always using legacy pairing instead of SSP.  Fix
    from Andrzej Kaczmarek.

 4) Bluetooth cancels delayed work erroneously, put stricter checks in
    place.  From Andrei Emeltchenko.

 5) Fix deadlock between cfg80211_mutex and reg_regdb_search_mutex in
    cfg80211, from Luis R.  Rodriguez.

 6) Fix interrupt double release in iwlwifi, from Emmanuel Grumbach.

 7) Missing module license in bcm87xx driver, from Peter Huewe.

 8) Team driver can lose port changed events when adding devices to a
    team, fix from Jiri Pirko.

 9) Fix endless loop when trying ot unregister PPPOE device in zombie
    state, from Xiaodong Xu.

10) batman-adv layer needs to set MAC address of software device
    earlier, otherwise we call tt_local_add with it uninitialized.

11) Fix handling of KSZ8021 PHYs, it's matched currently by KS8051 but
    that doesn't program the device properly.  From Marek Vasut.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  ipv6: mip6: fix mip6_mh_filter()
  ipv6: raw: fix icmpv6_filter()
  net: guard tcp_set_keepalive() to tcp sockets
  phy/micrel: Add missing header to micrel_phy.h
  phy/micrel: Rename KS80xx to KSZ80xx
  phy/micrel: Implement support for KSZ8021
  batman-adv: Fix symmetry check / route flapping in multi interface setups
  batman-adv: Fix change mac address of soft iface.
  pppoe: drop PPPOX_ZOMBIEs in pppoe_release
  team: send port changed when added
  ipv4: raw: fix icmp_filter()
  net/phy/bcm87xx: Add MODULE_LICENSE("GPL") to GPL driver
  iwlwifi: don't double free the interrupt in failure path
  cfg80211: fix possible circular lock on reg_regdb_search()
  Bluetooth: Fix not removing power_off delayed work
  Bluetooth: Fix freeing uninitialized delayed works
  Bluetooth: mgmt: Fix enabling LE while powered off
  Bluetooth: mgmt: Fix enabling SSP while powered off
2012-09-25 14:20:29 -07:00
Eric Dumazet
96af69ea2a ipv6: mip6: fix mip6_mh_filter()
mip6_mh_filter() should not modify its input, or else its caller
would need to recompute ipv6_hdr() if skb->head is reallocated.

Use skb_header_pointer() instead of pskb_may_pull()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-25 16:04:44 -04:00
David S. Miller
78cc88c408 Included fixes:
- fix the behaviour of batman-adv in case of virtual interface MAC change event
 - fix symmetric link check in neighbour selection
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Merge tag 'batman-adv-fix-for-davem' of git://git.open-mesh.org/linux-merge

Included fixes:
- fix the behaviour of batman-adv in case of virtual interface MAC change event
- fix symmetric link check in neighbour selection

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-25 13:24:02 -04:00
Eric Dumazet
1b05c4b50e ipv6: raw: fix icmpv6_filter()
icmpv6_filter() should not modify its input, or else its caller
would need to recompute ipv6_hdr() if skb->head is reallocated.

Use skb_header_pointer() instead of pskb_may_pull() and
change the prototype to make clear both sk and skb are const.

Also, if icmpv6 header cannot be found, do not deliver the packet,
as we do in IPv4.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-25 13:21:49 -04:00
Linus Torvalds
9391734d76 SuperH fixes for 3.6-final
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Merge tag 'sh-for-linus' of git://github.com/pmundt/linux-sh

Pull SuperH fix from Paul Mundt:
 "One last minute regression fix.."

* tag 'sh-for-linus' of git://github.com/pmundt/linux-sh:
  sh: pfc: Fix up GPIO mux type reconfig case.
2012-09-25 09:20:48 -07:00
Linus Torvalds
e108a3c326 Merge branch 'akpm' (sundry from Andrew)
Merge misc fixes from Andrew Morton:
 "One maintainer change and three bugfixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (4 commits)
  c/r: prctl: fix build error for no-MMU case
  lib/flex_proportions.c: fix corruption of denominator in flexible proportions
  checksyscalls: fix "here document" handling
  pwm-backlight: take over maintenance
2012-09-25 09:00:02 -07:00
Mark Salter
be8cfc4af1 c/r: prctl: fix build error for no-MMU case
Commit 1ad75b9e16 ("c/r: prctl: add minimal address test to
PR_SET_MM") added some address checking to prctl_set_mm() used by
checkpoint-restore.  This causes a build error for no-MMU systems:

   kernel/sys.c: In function 'prctl_set_mm':
   kernel/sys.c:1868:34: error: 'mmap_min_addr' undeclared (first use in this function)

The test for mmap_min_addr doesn't make a lot of sense for no-MMU code
as noted in commit 6e14154676 ("NOMMU: Optimise away the
{dac_,}mmap_min_addr tests").

This patch defines mmap_min_addr as 0UL in the no-MMU case so that the
compiler will optimize away tests for "addr < mmap_min_addr".

Signed-off-by: Mark Salter <msalter@redhat.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: <stable@vger.kernel.org>	[3.6.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-09-25 08:59:21 -07:00
Jan Kara
b5bd6a0e5f lib/flex_proportions.c: fix corruption of denominator in flexible proportions
When racing with CPU hotplug, percpu_counter_sum() can return negative
values for the number of observed events.

This confuses fprop_new_period(), which uses unsigned type and as a
result number of events is set to big *positive* number.  From that
moment on, things go pear shaped and can result e.g.  in division by
zero as denominator is later truncated to 32-bits.

This bug causes a divide-by-zero oops in bdi_dirty_limit() in Borislav's
3.6.0-rc6 based kernel.

Fix the issue by using a signed type in fprop_new_period().  That makes
us bail out from the function without doing anything (mistakenly)
thinking there are no events to age.  That makes aging somewhat
inaccurate but getting accurate data would be rather hard.

Signed-off-by: Jan Kara <jack@suse.cz>
Reported-by: Borislav Petkov <bp@amd64.org>
Reported-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-09-25 08:59:21 -07:00
Heiko Carstens
0e75898fe2 checksyscalls: fix "here document" handling
"echo" doesn't read from stdin, therefore the checksyscalls script didn't
warn about not implemented system calls anymore since 29dc54c6
("checksyscalls: Use arch/x86/syscalls/syscall_32.tbl as source").

Use "cat" instead of "echo" which handles this correctly.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-09-25 08:59:21 -07:00
Thierry Reding
a140b98dcd pwm-backlight: take over maintenance
Since the pwm-backlight driver is lacking a proper maintainer and is the
heaviest user of the PWM framework I'm taking over maintenance.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Acked-by: Arun Murthy <arun.murthy@stericsson.com>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Robert Morell <rmorell@nvidia.com>
Cc: Dilan Lee <dilee@nvidia.com>
Cc: Axel Lin <axel.lin@gmail.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-09-25 08:59:21 -07:00
Paul Mundt
16d74ebeb1 sh: pfc: Fix up GPIO mux type reconfig case.
Some drivers need to switch pin states between GPIO and pin function at
runtime, which was inadvertently broken in the pinctrl driver for GPIOs
being bound to a specific direction.

This fixes up the request path to ensure that previously configured GPIOs
don't cause us to inadvertently error out with an unsupported mux on
reconfig, which in practice is primarily aimed at trapping pull-up/down
users that have yet to be implemented under the new API.

Fixes up regressions in the TPU PWM driver, amongst others.

Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-09-25 11:51:05 +09:00
David S. Miller
41e268565a Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
John W. Linville says:

====================
Please pull this last(?) batch of fixes intended for 3.6...

For the Bluetooth bits, Gustavo says this:

"Here goes probably my last update to 3.6. It includes the two patches
you were ok last week(from Andrzej Kaczmarek), those are critical
ones, and two other fixes one for a system crash and the other for
a missing lockdep annotation."

The referenced fixes from Andrzej prevent attempts to configure devices
that are powered-off.

Along with the Bluetooth fixes, there are a couple of 802.11 fixes.
Emmanuel Grumbach gives us an iwlwifi fix to prevent releasing an
interrupt twice.  Luis R. Rodriguez provides a fix for a possible
circular lock dependency in the cfg80211 regulatory enforcement code.

All of these have been in linux-next for a few days.  I hope they are
not too late to make the 3.6 release!
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-24 22:00:00 -04:00
Linus Torvalds
56d27adcb5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Pull tile gxio ABI fix from Chris Metcalf:
 "This fixes a last-minute change in the Tilera hypervisor ABI for TRIO
  (PCI root complex) support.  We've locked in this ABI going forward
  and will make sure no further ABI changes like this occur."

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  tile: gxio iorpc numbering change for TRIO interface
2012-09-24 16:17:17 -07:00
Linus Torvalds
1abbce4e83 VFIO doc update and virqfd race fix
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Merge tag 'vfio-for-linus' of git://github.com/awilliam/linux-vfio

Pull vfio fixes from Alex Williamson:
 "VFIO doc update and virqfd race fix"

* tag 'vfio-for-linus' of git://github.com/awilliam/linux-vfio:
  vfio: Fix virqfd release race
  vfio: Trivial Documentation correction
2012-09-24 16:16:33 -07:00
Linus Torvalds
0c59f23613 * Disable PV NUMA support as we do not do anything with it (yet)
and it can cause bootup crashes on certain AMD machines.
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Merge tag 'stable/for-linus-3.6-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

Pull a Xen fix from Konrad Rzeszutek Wilk:
 "It is a bug-fix when we run the initial PV guest on a AMD K8 machine
  and have CONFIG_AMD_NUMA enabled and detect the NUMA topology from the
  Northbridge.

  We end up in the situation where the initial domain gets too much
  information and gets confused and crashes - the fix is to restrict the
  domain to get the information - and we do it by just disabling NUMA on
  the PV guest (the hypervisor is still able to do its proper NUMA
  allocations of guests).

  It is OK to disable the PV guest from accessing NUMA data as right now
  we do not inject any NUMA node information to the PV guests.  When we
  do get to that point, then this patch will have to be reverted."

 * Disable PV NUMA support as we do not do anything with it (yet) and it
   can cause bootup crashes on certain AMD machines.

* tag 'stable/for-linus-3.6-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/boot: Disable NUMA for PV guests.
2012-09-24 16:14:34 -07:00
Linus Torvalds
bee2d97b2c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull two ceph fixes from Sage Weil:
 "The first fixes a leak in the rbd setup error path, and the second
  fixes a more serious problem with mismatched kmap/kunmap that surfaced
  after the recent refactoring work."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
  libceph: only kunmap kmapped pages
  rbd: drop dev reference on error in rbd_open()
2012-09-24 16:13:49 -07:00
Eric Dumazet
3e10986d1d net: guard tcp_set_keepalive() to tcp sockets
Its possible to use RAW sockets to get a crash in
tcp_set_keepalive() / sk_reset_timer()

Fix is to make sure socket is a SOCK_STREAM one.

Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-24 16:51:53 -04:00