Commit Graph

49386 Commits

Author SHA1 Message Date
Russell King
ca15f790e0 Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/genesis-2.6 2010-09-01 10:06:21 +01:00
Mikael Pettersson
418cf646c9 ARM: 6343/1: wire up fanotify and prlimit64 syscalls on ARM
The 2.6.36-rc kernel added three new system calls:
fanotify_init, fanotify_mark, and prlimit64.  This patch
wires them up on ARM.

The only non-trivial issue here is the u64 argument to
sys_fanotify_mark(), but it is the 3rd argument and thus
passed in r2/r3 in both kernel and user space, so it causes
no problems.

Tested with a 2.6.36-rc2 EABI kernel on an ixp4xx machine.

Tested-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-09-01 10:06:08 +01:00
Will Deacon
25d3584797 ARM: 6330/1: perf: reword comments relating to perf_event_do_pending
This is purely a cosmetic change to the ARM perf backend because the current
comments about the relationship between NMIs, interrupt context and
perf_event_do_pending are misleading.

This patch updates the comments so that they reflect what the code
actually does (which is in line with other architectures).

Acked-by: Jamie Iles <jamie.iles@picochip.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-09-01 10:06:08 +01:00
Linus Torvalds
303fd2c2ce Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin:
  Blackfin: bf52x/bf54x boards: drop unused nand page size
  Blackfin: punt duplicate SPORT MMR defines
2010-08-28 14:24:49 -07:00
Linus Torvalds
45b5bed7bc Merge branch 's5p-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung
* 's5p-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: S5PV310: Fix on Secondary CPU startup
  ARM: S5PV310: Bug fix on uclk1 and sclk_pwm
  ARM: S5PV310: Fix missed uart clocks
  ARM: S5PV310: Should be clk_sclk_apll not clk_mout_apll
  ARM: S5PV310: Fix on PLL setting for S5PV310
  ARM: S5PV310: Add CMU block for S5PV310 Clock
  ARM: S5PV310: Fix on typo irqs.h of S5PV310
  ARM: S5PV310: Fix on default ZRELADDR of ARCH_S5PV310
  ARM: S5PV310: Fix on GPIO base addresses
  ARM: SAMSUNG: Fix on build warning regarding VMALLOC_END type
  ARM: S5P: VMALLOC_END should be unsigned long
2010-08-28 14:12:05 -07:00
Linus Torvalds
8f2a0029b8 Merge branch 'for-linus' of git://android.git.kernel.org/kernel/tegra
* 'for-linus' of git://android.git.kernel.org/kernel/tegra:
  arm: tegra: VMALLOC_END should be unsigned long
  arm: tegra: fix compilation of board-harmony.c
2010-08-28 14:09:16 -07:00
Linus Torvalds
a5a8283495 Merge branch 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
* 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6:
  OMAP3: PM: ensure IO wakeups are properly disabled
  omap: Fix omap_4430sdp_defconfig for make oldconfig
  omap: Use CONFIG_SMP for test_for_ipi and test_for_ltirq
  omap: Fix sev instruction usage for multi-omap
  OMAP3: Fix a cpu type check problem
  omap3: id: fix 3630 rev detection
2010-08-28 14:07:38 -07:00
David Howells
62b88dc191 Alpha: Fix a missing comma in sys_osf_statfs()
Fix a comma that got accidentally deleted from sys_osf_statfs() leading to the
following warning:

  arch/alpha/kernel/osf_sys.c: In function 'SYSC_osf_statfs':
  arch/alpha/kernel/osf_sys.c:255: error: syntax error before 'buffer'

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-28 14:01:03 -07:00
Linus Torvalds
2637d139fb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: pxa27x_keypad - remove input_free_device() in pxa27x_keypad_remove()
  Input: mousedev - fix regression of inverting axes
  Input: uinput - add devname alias to allow module on-demand load
  Input: hil_kbd - fix compile error
  USB: drop tty argument from usb_serial_handle_sysrq_char()
  Input: sysrq - drop tty argument form handle_sysrq()
  Input: sysrq - drop tty argument from sysrq ops handlers
2010-08-28 13:55:31 -07:00
Barry Song
9e5610a995 Blackfin: bf52x/bf54x boards: drop unused nand page size
Now that the driver for the Blackfin on-chip NFC no longer uses/respects
the page_size from the platform resources (figures out the needs on the
fly), drop it from the platform resources.  This fixes some build errors
since the defines no longer exists.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-08-27 16:08:43 -04:00
Mike Frysinger
ac0a5042be Blackfin: punt duplicate SPORT MMR defines
The common bfin_sport.h header now has unified definitions of these, so
stop polluting the global namespace.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-08-27 15:58:27 -04:00
Changhwan Youn
766211e748 ARM: S5PV310: Fix on Secondary CPU startup
Following occurs on boot message without this patch.
    CPU1: processor failed to boot
    Brought up 1 CPUs
    SMP: Total of 1 processors activated...

This patch adds SYSRAM mapping for fixing Secondary CPU startup.
    CPU1: Booted secondary processor
    Brought up 2 CPUs
    SMP: Total of 2 processors activated...

Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-08-27 18:29:58 +09:00
Jongpill Lee
3297c2e6d7 ARM: S5PV310: Bug fix on uclk1 and sclk_pwm
This patch fixes on enable and ctrlbit of uclk1 and sclk_pwm.

Signed-off-by: Jongpill Lee <boyko.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-08-27 18:29:27 +09:00
Jongpill Lee
5a847b4af8 ARM: S5PV310: Fix missed uart clocks
This patch adds missed uart clocks for S5PV310/S5PC210.

Signed-off-by: Jongpill Lee <boyko.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-08-27 18:29:24 +09:00
Jongpill Lee
3ff310206d ARM: S5PV310: Should be clk_sclk_apll not clk_mout_apll
This patch adds clk_sclk_apll so that fixes on clk_mout_apll.

Signed-off-by: Jongpill Lee <boyko.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-08-27 18:06:54 +09:00
Jongpill Lee
4d235f7934 ARM: S5PV310: Fix on PLL setting for S5PV310
This patch fixes on PLL setting for S5PV310/S5PC210.

Signed-off-by: Jongpill Lee <boyko.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-08-27 18:06:54 +09:00
Kukjin Kim
c598c47d85 ARM: S5PV310: Add CMU block for S5PV310 Clock
This patch adds CMU block for S5PV310/S5PC210 clock.
(CMU: Clock Management Unit)
Of course, changed current clock addresses for it together.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-08-27 18:04:37 +09:00
Kukjin Kim
35fc950bd5 ARM: S5PV310: Fix on typo irqs.h of S5PV310
This patch fixes typo 'IRQ_WTD' in the irqs.h of S5PV310.
And minor update comments.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-08-27 18:04:13 +09:00
Kukjin Kim
68c1dbcb5a ARM: S5PV310: Fix on default ZRELADDR of ARCH_S5PV310
This patch adds default zreladdr of ARCH_S5PV310.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-08-27 15:29:11 +09:00
Kyungmin Park
4d9147053b ARM: S5PV310: Fix on GPIO base addresses
The S5PV310/S5PC210 has following three GPIO base addresses.

Part1 Base Address=0x11400000
Part2 Base Address=0x11000000
Part3 Base Address=0x03860000

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[kgene.kim@samsung.com: minor edit of title]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-08-27 15:29:01 +09:00
Kukjin Kim
15cae77ad8 ARM: SAMSUNG: Fix on build warning regarding VMALLOC_END type
Fix this warning:

arch/arm/mm/init.c: In function 'mem_init':
arch/arm/mm/init.c:644: warning: format '%08lx' expects type
'long unsigned int', but argument 12 has type 'unsigned int'

And removes the useless parens and white space.

Reported-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
2010-08-27 15:28:38 +09:00
Linus Torvalds
d4348c6789 Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf, x86, Pentium4: Clear the P4_CCCR_FORCE_OVF flag
  tracing/trace_stack: Fix stack trace on ppc64
2010-08-25 10:50:07 -07:00
Linus Torvalds
5e686019df Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, tsc, sched: Recompute cyc2ns_offset's during resume from sleep states
  sched: Fix rq->clock synchronization when migrating tasks
2010-08-25 08:40:56 -07:00
Lin Ming
8d33091992 perf, x86, Pentium4: Clear the P4_CCCR_FORCE_OVF flag
If on Pentium4 CPUs the FORCE_OVF flag is set then an NMI happens
on every event, which can generate a flood of NMIs. Clear it.

Reported-by: Vince Weaver <vweaver1@eecs.utk.edu>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-08-25 15:15:33 +02:00
Linus Torvalds
f4e385ccfc Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] fix tlb flushing vs. concurrent /proc accesses
  [S390] s390: fix build error (sys_execve)
2010-08-24 10:43:08 -07:00
Linus Torvalds
1a7c55368c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Get rid of indirect p1275 PROM call buffer.
  sparc64: Fill a missing delay slot.
  sparc64: Make lock backoff really a NOP on UP builds.
  sparc64: simple microoptimizations for atomic functions
  sparc64: Make rwsems 64-bit.
  sparc64: Really fix atomic64_t interface types.
2010-08-24 10:10:13 -07:00
Martin Schwidefsky
050eef364a [S390] fix tlb flushing vs. concurrent /proc accesses
The tlb flushing code uses the mm_users field of the mm_struct to
decide if each page table entry needs to be flushed individually with
IPTE or if a global flush for the mm_struct is sufficient after all page
table updates have been done. The comment for mm_users says "How many
users with user space?" but the /proc code increases mm_users after it
found the process structure by pid without creating a new user process.
Which makes mm_users useless for the decision between the two tlb
flusing methods. The current code can be confused to not flush tlb
entries by a concurrent access to /proc files if e.g. a fork is in
progres. The solution for this problem is to make the tlb flushing
logic independent from the mm_users field.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-08-24 09:26:34 +02:00
Linus Torvalds
bd45fe539f Merge git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (25 commits)
  powerpc: Fix config dependency problem with MPIC_U3_HT_IRQS
  via-pmu: Add compat_pmu_ioctl
  powerpc: Wire up fanotify_init, fanotify_mark, prlimit64 syscalls
  powerpc/pci: Fix checking for child bridges in PCI code.
  powerpc: Fix typo in uImage target
  powerpc: Initialise paca->kstack before early_setup_secondary
  powerpc: Fix bogus it_blocksize in VIO iommu code
  powerpc: Inline ppc64_runlatch_off
  powerpc: Correct smt_enabled=X boot option for > 2 threads per core
  powerpc: Silence xics_migrate_irqs_away() during cpu offline
  powerpc: Silence __cpu_up() under normal operation
  powerpc: Re-enable preemption before cpu_die()
  powerpc/pci: Drop unnecessary null test
  powerpc/powermac: Drop unnecessary null test
  powerpc/powermac: Drop unnecessary of_node_put
  powerpc/kdump: Stop all other CPUs before running crash handlers
  powerpc/mm: Fix vsid_scrample typo
  powerpc: Use is_32bit_task() helper to test 32 bit binary
  powerpc: Export memstart_addr and kernstart_addr on ppc64
  powerpc: Make rwsem use "long" type
  ...
2010-08-24 00:26:34 -07:00
Sebastian Ott
7af048dc76 [S390] s390: fix build error (sys_execve)
fix this build error:
arch/s390/kernel/process.c:272: error: conflicting types for 'sys_execve'
arch/s390/kernel/entry.h:45: error: previous declaration of 'sys_execve' was here
make[1]: *** [arch/s390/kernel/process.o] Error 1
make: *** [arch/s390/kernel] Error 2

introduced by d7627467b7

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-08-24 09:26:34 +02:00
Linus Torvalds
d20de76354 Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (29 commits)
  ARM: imx: fix build failure concerning otg/ulpi
  USB: ftdi_sio: add product ID for Lenz LI-USB
  USB: adutux: fix misuse of return value of copy_to_user()
  USB: iowarrior: fix misuse of return value of copy_to_user()
  USB: xHCI: update ring dequeue pointer when process missed tds
  USB: xhci: Remove buggy assignment in next_trb()
  USB: ftdi_sio: Add ID for Ionics PlugComputer
  USB: serial: io_ti.c: don't return 0 if writing the download record failed
  USB: otg: twl4030: fix wrong assumption of starting state
  USB: gadget: Return -ENOMEM on memory allocation failure
  USB: gadget: fix composite kernel-doc warnings
  USB: ssu100: set tty_flags in ssu100_process_packet
  USB: ssu100: add disconnect function for ssu100
  USB: serial: export symbol usb_serial_generic_disconnect
  USB: ssu100: rework logic for TIOCMIWAIT
  USB: ssu100: add register parameter to ssu100_setregister
  USB: ssu100: remove duplicate #defines in ssu100
  USB: ssu100: refine process_packet in ssu100
  USB: ssu100: add locking for port private data in ssu100
  USB: r8a66597-udc: return -ENOMEM if kzalloc() fails
  ...
2010-08-24 00:20:44 -07:00
David S. Miller
25edd6946a sparc64: Get rid of indirect p1275 PROM call buffer.
This is based upon a report by Meelis Roos showing that it's possible
that we'll try to fetch a property that is 32K in size with some
devices.  With the current fixed 3K buffer we use for moving data in
and out of the firmware during PROM calls, that simply won't work.

In fact, it will scramble random kernel data during bootup.

The reasoning behind the temporary buffer is entirely historical.  It
used to be the case that we had problems referencing dynamic kernel
memory (including the stack) early in the boot process before we
explicitly told the firwmare to switch us over to the kernel trap
table.

So what we did was always give the firmware buffers that were locked
into the main kernel image.

But we no longer have problems like that, so get rid of all of this
indirect bounce buffering.

Besides fixing Meelis's bug, this also makes the kernel data about 3K
smaller.

It was also discovered during these conversions that the
implementation of prom_retain() was completely wrong, so that was
fixed here as well.  Currently that interface is not in use.

Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-08-23 23:10:57 -07:00
Andreas Schwab
314b389b17 powerpc: Fix config dependency problem with MPIC_U3_HT_IRQS
MPIC_U3_HT_IRQS is selected both by PPC_PMAC64 and PPC_MAPLE, but depends
on PPC_MAPLE, so a PPC_PMAC64-only config gets this warning:

warning: (PPC_PMAC64 && PPC_PMAC && POWER4 || PPC_MAPLE && PPC64 && PPC_BOOK3S) selects MPIC_U3_HT_IRQS which has unmet direct dependencies (PPC_MAPLE)

Fix that by removing the dependency on PPC_MAPLE.

Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:28:29 +10:00
Andreas Schwab
bcc30d3758 powerpc: Wire up fanotify_init, fanotify_mark, prlimit64 syscalls
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:28:28 +10:00
Grant Likely
76ec01dbb7 powerpc/pci: Fix checking for child bridges in PCI code.
pci_device_to_OF_node() can return null, and list_for_each_entry will
never enter the loop when dev is NULL, so it looks like this test is
a typo.

Reported-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:28:27 +10:00
Anatolij Gustschin
c686ecf504 powerpc: Fix typo in uImage target
Commit e32e78c5ee
(powerpc: fix build with make 3.82) introduced a
typo in uImage target and broke building uImage:

make: *** No rule to make target `uImage'.  Stop.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: stable <stable@kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:32 +10:00
Matt Evans
f761622e59 powerpc: Initialise paca->kstack before early_setup_secondary
As early setup calls down to slb_initialize(), we must have kstack
initialised before checking "should we add a bolted SLB entry for our kstack?"

Failing to do so means stack access requires an SLB miss exception to refill
an entry dynamically, if the stack isn't accessible via SLB(0) (kernel text
& static data).  It's not always allowable to take such a miss, and
intermittent crashes will result.

Primary CPUs don't have this issue; an SLB entry is not bolted for their
stack anyway (as that lives within SLB(0)).  This patch therefore only
affects the init of secondaries.

Signed-off-by: Matt Evans <matt@ozlabs.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:31 +10:00
Anton Blanchard
7aa241fdce powerpc: Fix bogus it_blocksize in VIO iommu code
When looking at some issues with the virtual ethernet driver I noticed
that TCE allocation was following a very strange pattern:

address 00e9000 length 2048
address 0409000 length 2048 <-----
address 0429000 length 2048
address 0449000 length 2048
address 0469000 length 2048
address 0489000 length 2048
address 04a9000 length 2048
address 04c9000 length 2048
address 04e9000 length 2048
address 4009000 length 2048 <-----
address 4029000 length 2048

Huge unexplained gaps in what should be an empty TCE table. It turns out
it_blocksize, the amount we want to align the next allocation to, was
c0000000fe903b20. Completely bogus.

Initialise it to something reasonable in the VIO IOMMU code, and use kzalloc
everywhere to protect against this when we next add a non compulsary
field to iommu code and forget to initialise it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:31 +10:00
Anton Blanchard
4138d65333 powerpc: Inline ppc64_runlatch_off
I'm sick of seeing ppc64_runlatch_off in our profiles, so inline it
into the callers. To avoid a mess of circular includes I didn't add
it as an inline function.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:30 +10:00
Nathan Fontenot
954e6da54b powerpc: Correct smt_enabled=X boot option for > 2 threads per core
The 'smt_enabled=X' boot option does not handle values of X > 2.
For Power 7 processors with smt modes of 0,1,2,3, and 4 this does
not work.  This patch allows the smt_enabled option to be set to
any value limited to a max equal to the number of threads per
core.

Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:30 +10:00
Signed-off-by: Darren Hart
1afb56cf97 powerpc: Silence xics_migrate_irqs_away() during cpu offline
All IRQs are migrated away from a CPU that is being offlined so the
following messages suggest a problem when the system is behaving as
designed:

IRQ 262 affinity broken off cpu 1
IRQ 17 affinity broken off cpu 0
IRQ 18 affinity broken off cpu 0
IRQ 19 affinity broken off cpu 0
IRQ 256 affinity broken off cpu 0
IRQ 261 affinity broken off cpu 0
IRQ 262 affinity broken off cpu 0

Don't print these messages when the CPU is not online.

Signed-off-by: Darren Hart <dvhltc@us.ibm.com>
Acked-by: Will Schmidt <will_schmidt@vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Nathan Fontenot <nfont@austin.ibm.com>
Cc: Robert Jennings <rcj@linux.vnet.ibm.com>
Cc: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:30 +10:00
Signed-off-by: Darren Hart
6685a47749 powerpc: Silence __cpu_up() under normal operation
During CPU offline/online tests __cpu_up would flood the logs with
the following message:

Processor 0 found.

This provides no useful information to the user as there is no context
provided, and since the operation was a success (to this point) it is expected
that the CPU will come back online, providing all the feedback necessary.

Change the "Processor found" message to DBG() similar to other such messages in
the same function. Also, add an appropriate log level for the "Processor is
stuck" message.

Signed-off-by: Darren Hart <dvhltc@us.ibm.com>
Acked-by: Will Schmidt <will_schmidt@vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Nathan Fontenot <nfont@austin.ibm.com>
Cc: Robert Jennings <rcj@linux.vnet.ibm.com>
Cc: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:29 +10:00
Signed-off-by: Darren Hart
a7c2bb8279 powerpc: Re-enable preemption before cpu_die()
start_secondary() is called shortly after _start and also via

cpu_idle()->cpu_die()->pseries_mach_cpu_die()

start_secondary() expects a preempt_count() of 0. pseries_mach_cpu_die() is
called via the cpu_idle() routine with preemption disabled, resulting in the
following repeating message during rapid cpu offline/online tests
with CONFIG_PREEMPT=y:

BUG: scheduling while atomic: swapper/0/0x00000002
Modules linked in: autofs4 binfmt_misc dm_mirror dm_region_hash dm_log [last unloaded: scsi_wait_scan]
Call Trace:
[c00000010e7079c0] [c0000000000133ec] .show_stack+0xd8/0x218 (unreliable)
[c00000010e707aa0] [c0000000006a47f0] .dump_stack+0x28/0x3c
[c00000010e707b20] [c00000000006e7a4] .__schedule_bug+0x7c/0x9c
[c00000010e707bb0] [c000000000699d9c] .schedule+0x104/0x800
[c00000010e707cd0] [c000000000015b24] .cpu_idle+0x1c4/0x1d8
[c00000010e707d70] [c0000000006aa1b4] .start_secondary+0x398/0x3d4
[c00000010e707e30] [c000000000008278] .start_secondary_resume+0x10/0x14

Move the cpu_die() call inside the existing preemption enabled block of
cpu_idle(). This is safe as the idle task is affined to a single CPU so the
debug_smp_processor_id() tests (from cpu_should_die()) won't trigger as we are
in a "migration disabled" region.

Signed-off-by: Darren Hart <dvhltc@us.ibm.com>
Acked-by: Will Schmidt <will_schmidt@vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Nathan Fontenot <nfont@austin.ibm.com>
Cc: Robert Jennings <rcj@linux.vnet.ibm.com>
Cc: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:29 +10:00
Julia Lawall
da9bef6735 powerpc/pci: Drop unnecessary null test
list_for_each_entry binds its first argument to a non-null value, and thus
any null test on the value of that argument is superfluous.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
iterator I;
expression x,E,E1,E2;
statement S,S1,S2;
@@

I(x,...) { <...
- if (x != NULL || ...)
  S
  ...> }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:28 +10:00
Julia Lawall
5fba610ec9 powerpc/powermac: Drop unnecessary null test
for_each_node_by_name binds its first argument to a non-null value, and
thus any null test on the value of that argument is superfluous.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
iterator I;
expression x,E;
@@

I(x,...) { <...
(
- (x != NULL) &&
  E
  ...> }
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:28 +10:00
Julia Lawall
d1efa2a755 powerpc/powermac: Drop unnecessary of_node_put
for_each_node_by_name only exits when its first argument is NULL, and a
subsequent call to of_node_put on that argument is unnecessary.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
iterator name for_each_node_by_name;
expression np,E;
identifier l;
@@

for_each_node_by_name(np,...) {
  ... when != break;
      when != goto l;
}
... when != np = E
- of_node_put(np);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Reviewed-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:28 +10:00
Anton Blanchard
249ec22875 powerpc/kdump: Stop all other CPUs before running crash handlers
During kdump we run the crash handlers first then stop all other CPUs.
We really want to stop all CPUs as close to the fail as possible and also
have a very controlled environment for running the crash handlers, so it
makes sense to reverse the order.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:27 +10:00
Anton Blanchard
3469270807 powerpc/mm: Fix vsid_scrample typo
The code is wrapped in an #if 0, but it's wrong so we may as well fix it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:27 +10:00
Denis Kirjanov
9904b00593 powerpc: Use is_32bit_task() helper to test 32 bit binary
Use is_32bit_task() helper to test 32 bit binary.

Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:27 +10:00
Sonny Rao
79c3095fb3 powerpc: Export memstart_addr and kernstart_addr on ppc64
Some modules (like eHCA) want to map all of kernel memory, for this to
work with a relocated kernel, we need to export kernstart_addr so
modules can use PHYSICAL_START and memstart_addr so they could use
MEMORY_START.  Note that the 32bit code already exports these symbols.

Signed-off-By: Sonny Rao <sonnyrao@us.ibm.com>

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 15:26:26 +10:00
Benjamin Herrenschmidt
529b7307d8 powerpc: Make rwsem use "long" type
This makes the 64-bit kernel use 64-bit signed integers for the counter
(effectively supporting 32-bit of active count in the semaphore), thus
avoiding things like overflow of the mmap_sem if you use a really crazy
number of threads

Note: Ideally the type in the structure should be atomic_long_t rather
than "long". However, there's some nasty issues with that. It needs to
be initialized statically -and- lib/rwsem.c does things like

        sem->count = RWSEM_UNLOCKED_VALUE;

Now, if you mix in the fact that atomic_* types are actually structures
with one member and note typedefs of a scalar, it makes its really nasty.

So I stuck to what we did before using a long and casts for now.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-24 14:41:48 +10:00