Gautham R Shenoy [Tue, 23 Jun 2009 23:26:37 +0000 (23:26 +0000)]
powerpc/pseries: Reduce the polling interval in __cpu_up()
Time time taken for a single cpu online operation on a pseries machine
is as follows:
Dedicated LPAR (POWER6): ~220ms.
Shared LPAR (POWER5) : ~240ms.
Of this time, approximately 200ms is taken up by __cpu_up(). This is because
we poll every 200ms to check if the new cpu has notified it's presence
through the cpu_callin_map. We repeat this operation until the new cpu sets
the value in cpu_callin_map or 5 seconds elapse, whichever comes earlier.
However, using completion_structs instead of polling loops,
the time taken by the new processor to indicate it's presence has
found to be less than 1ms on pseries. This method however may not
work on all powerpc platforms due to the time-base synchronization code.
Keeping this in mind, we could reduce msleep polling interval from
200ms to 1ms while retaining the 5 second timeout.
With this, the time taken for a cpu online operation changes as follows:
Dedicated LPAR (POWER6): 20-25ms.
Shared LPAR (POWER5) : 60-80ms.
In both these cases, it was found that the code polls through the loop
only once indicating that 1ms is a reasonable value, atleast on pseries.
The code needs testing on other powerpc platforms.
Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Acked-by: Joel Schopp <jschopp@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Bastian Blank [Wed, 12 Aug 2009 23:30:45 +0000 (23:30 +0000)]
powerpc: Remove SMP warning from PowerMac cpufreq
On Thu, Aug 13, 2009 at 04:14:58PM +1000, Benjamin Herrenschmidt wrote:
> On Tue, 2009-08-11 at 11:39 +0200, Bastian Blank wrote:
> > This patch just disables this driver on SMP kernels, as it is obviously
> > not supported.
> Why not remove the #error instead ? :-) I don't think it's still
> meaningful, especially since we use the timebase for delays nowadays
> which doesn't depend on the CPU frequency...
Your call. Take this one:
The build of a PowerMac 32bit kernel currently fails with
error: #warning "WARNING, CPUFREQ not recommended on SMP kernels"
Thie patch removes the not longer applicable SMP warning from the
PowerMac cpufreq code.
Signed-off-by: Bastian Blank <waldi@debian.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Josh Boyer [Wed, 19 Aug 2009 04:27:53 +0000 (04:27 +0000)]
powerpc: Fix __flush_icache_range on 44x
The ptrace POKETEXT interface allows a process to modify the text pages of
a child process being ptraced, usually to insert breakpoints via trap
instructions. The kernel eventually calls copy_to_user_page, which in turn
calls __flush_icache_range to invalidate the icache lines for the child
process.
However, this function does not work on 44x due to the icache being virtually
indexed. This was noticed by a breakpoint being triggered after it had been
cleared by ltrace on a 440EPx board. The convenient solution is to do a
flash invalidate of the icache in the __flush_icache_range function.
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/mm: Cleanup handling of execute permission
This is an attempt at cleaning up a bit the way we handle execute
permission on powerpc. _PAGE_HWEXEC is gone, _PAGE_EXEC is now only
defined by CPUs that can do something with it, and the myriad of
#ifdef's in the I$/D$ coherency code is reduced to 2 cases that
hopefully should cover everything.
The logic on BookE is a little bit different than what it was though
not by much. Since now, _PAGE_EXEC will be set by the generic code
for executable pages, we need to filter out if they are unclean and
recover it. However, I don't expect the code to be more bloated than
it already was in that area due to that change.
I could boast that this brings proper enforcing of per-page execute
permissions to all BookE and 40x but in fact, we've had that now for
some time as a side effect of my previous rework in that area (and
I didn't even know it :-) We would only enable execute permission if
the page was cache clean and we would only cache clean it if we took
and exec fault. Since we now enforce that the later only work if
VM_EXEC is part of the VMA flags, we de-fact already enforce per-page
execute permissions... Unless I missed something
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc/qe_lib: Set gpio data before changing the direction to output
This avoids having a short glitch if the desired initial value is not
the same as what was previously in the data register.
Signed-off-by: Michael Barkowski <michaelbarkowski@ruggedcom.com> Acked-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
David S. Miller [Tue, 25 Aug 2009 23:47:46 +0000 (16:47 -0700)]
sparc64: Validate linear D-TLB misses.
When page alloc debugging is not enabled, we essentially accept any
virtual address for linear kernel TLB misses. But with kgdb, kernel
address probing, and other facilities we can try to access arbitrary
crap.
So, make sure the address we miss on will translate to physical memory
that actually exists.
In order to make this work we have to embed the valid address bitmap
into the kernel image. And in order to make that less expensive we
make an adjustment, in that the max physical memory address is
decreased to "1 << 41", even on the chips that support a 42-bit
physical address space. We can do this because bit 41 indicates
"I/O space" and thus covers non-memory ranges.
The result of this is that:
1) kpte_linear_bitmap shrinks from 2K to 1K in size
2) we need 64K more for the valid address bitmap
We can't let the valid address bitmap be dynamically allocated
once we start using it to validate TLB misses, otherwise we have
crazy issues to deal with wrt. recursive TLB misses and such.
If we're in a TLB miss it could be the deepest trap level that's legal
inside of the cpu. So if we TLB miss referencing the bitmap, the cpu
will be out of trap levels and enter RED state.
To guard against out-of-range accesses to the bitmap, we have to check
to make sure no bits in the physical address above bit 40 are set. We
could export and use last_valid_pfn for this check, but that's just an
unnecessary extra memory reference.
On the plus side of all this, since we load all of these translations
into the special 4MB mapping TSB, and we check the TSB first for TLB
misses, there should be absolutely no real cost for these new checks
in the TLB miss path.
Reported-by: heyongli@gmail.com Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Tue, 25 Aug 2009 18:24:04 +0000 (11:24 -0700)]
Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
clockevent: Prevent dead lock on clockevents_lock
timers: Drop write permission on /proc/timer_list
Linus Torvalds [Tue, 25 Aug 2009 18:23:43 +0000 (11:23 -0700)]
Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
tracing: Fix too large stack usage in do_one_initcall()
tracing: handle broken names in ftrace filter
ftrace: Unify effect of writing to trace_options and option/*
Linus Torvalds [Tue, 25 Aug 2009 18:23:25 +0000 (11:23 -0700)]
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Fix build with older binutils and consolidate linker script
x86: Fix an incorrect argument of reserve_bootmem()
x86: add vmlinux.lds to targets in arch/x86/boot/compressed/Makefile
xen: rearrange things to fix stackprotector
x86: make sure load_percpu_segment has no stackprotector
i386: Fix section mismatches for init code with !HOTPLUG_CPU
x86, pat: Allow ISA memory range uncacheable mapping requests
Linus Torvalds [Tue, 25 Aug 2009 16:47:36 +0000 (09:47 -0700)]
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6:
ext3: Improve error message that changing journaling mode on remount is not possible
ext3: Update Kconfig description of EXT3_DEFAULTS_TO_ORDERED
Linus Torvalds [Tue, 25 Aug 2009 16:12:43 +0000 (09:12 -0700)]
tty: make sure to flush any pending work when halting the ldisc
When I rewrote tty ldisc code to use proper reference counts (commits 65b770468e98 and cbe9352fa08f) in order to avoid a race with hangup, the
test-program that Eric Biederman used to trigger the original problem
seems to have exposed another long-standing bug: the hangup code did the
'tty_ldisc_halt()' to stop any buffer flushing activity, but unlike the
other call sites it never actually flushed any pending work.
As a result, if you get just the right timing, the pending work may be
just about to execute (ie the timer has already triggered and thus
cancel_delayed_work() was a no-op), when we then re-initialize the ldisc
from under it.
That, in turn, results in various random problems, usually seen as a
NULL pointer dereference in run_timer_softirq() or a BUG() in
worker_thread (but it can be almost anything).
Fix it by adding the required 'flush_scheduled_work()' after doing the
tty_ldisc_halt() (this also requires us to move the ldisc halt to before
taking the ldisc mutex in order to avoid a deadlock with the workqueue
executing do_tty_hangup, which requires the mutex).
The locking should be cleaned up one day (the requirement to do this
outside the ldisc_mutex is very annoying, and weakens the lock), but
that's a larger and separate undertaking.
Reported-by: Eric W. Biederman <ebiederm@xmission.com> Tested-by: Xiaotian Feng <xtfeng@gmail.com> Tested-by: Yanmin Zhang <yanmin_zhang@linux.intel.com> Tested-by: Dave Young <hidave.darkstar@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Anton Vorontsov [Tue, 18 Aug 2009 23:28:21 +0000 (03:28 +0400)]
powerpc/85xx: Add QE USB support for MPC8569E-MDS boards
- Add gpio-controller node for BCSR17, it is used to control USB
speed and VBUS;
- Add timer node for QE GTM, needed for USB host;
- Add usb node itself;
- Add some probing code for BCSR GPIOs.
NOTE: QE USB doesn't work on prototype boards, but should work on
pilot boards if specs and schematics are correct, though we
don't have the pilot boards to actually test it.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Anton Vorontsov [Tue, 18 Aug 2009 23:28:10 +0000 (03:28 +0400)]
powerpc/82xx: Fix BCSR bits for MPC8272ADS boards
mpc8272_ads.c is using BCSR bits definitions from pq2ads.h, but
according to User's Guide the bits are wrong for MPC8272ADS boards
(I guess definitions from pq2ads should only be used for PQ2FADS
boards).
So, let's introduce our own definitions for MPC8272ADS, and don't
include pq2ads.h.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Anton Vorontsov [Tue, 18 Aug 2009 23:38:18 +0000 (03:38 +0400)]
powerpc/85xx: Add eSDHC support for MPC8536DS boards
This patch simply adds sdhci node to the device tree.
We specify clock-frequency manually, so that eSDHC will work without
upgrading U-Boot. Though, that'll only work for default setup (1500
MHz) on new board revisions. For non-default setups, it's recommended
to upgrade U-Boot, since it will fixup clock-frequency automatically.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Jan Beulich [Tue, 25 Aug 2009 13:50:53 +0000 (14:50 +0100)]
x86: Fix build with older binutils and consolidate linker script
binutils prior to 2.17 can't deal with the currently possible
situation of a new segment following the per-CPU segment, but
that new segment being empty - objcopy misplaces the .bss (and
perhaps also the .brk) sections outside of any segment.
However, the current ordering of sections really just appears
to be the effect of cumulative unrelated changes; re-ordering
things allows to easily guarantee that the segment following
the per-CPU one is non-empty, and at once eliminates the need
for the bogus data.init2 segment.
Once touching this code, also use the various data section
helper macros from include/asm-generic/vmlinux.lds.h.
Clemens Ladisch [Tue, 25 Aug 2009 06:15:41 +0000 (08:15 +0200)]
sound: pcm_lib: fix unsorted list constraint handling
snd_interval_list() expected a sorted list but did not document this, so
there are drivers that give it an unsorted list. To fix this, change
the algorithm to work with any list.
This fixes the "Slave PCM not usable" error with USB devices that have
multiple alternate settings with sample rates in decreasing order, such
as the Philips Askey VC010 WebCam.
http://bugzilla.kernel.org/show_bug.cgi?id=14028
Reported-and-tested-by: Andrzej <adkadk@gmail.com> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
David S. Miller [Tue, 25 Aug 2009 02:37:05 +0000 (19:37 -0700)]
pkt_sched: Fix bogon in tasklet_hrtimer changes.
Reported by Stephen Rothwell, luckily it's harmless:
net/sched/sch_api.c: In function 'qdisc_watchdog':
net/sched/sch_api.c:460: warning: initialization from incompatible pointer type
net/sched/sch_cbq.c: In function 'cbq_undelay':
net/sched/sch_cbq.c:595: warning: initialization from incompatible pointer type
Signed-off-by: David S. Miller <davem@davemloft.net>
Paul Gortmaker [Fri, 14 Aug 2009 16:13:54 +0000 (12:13 -0400)]
powerpc/85xx: sbc8560 - remove "has-rstcr" from global utilities block
The earlier mpc8560 CPUs don't have the RSTCR at 0xe00b0
in the GUTS. The generic reboot code uses this tag to
determine if it should be using the RSTCR for reboot, so
remove it from the board definition.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Paul Gortmaker [Fri, 14 Aug 2009 16:13:53 +0000 (12:13 -0400)]
powerpc/85xx: issue fsl_soc reboot warning only when applicable
Some CPU, like the MPC8560 don't have a RSTCR in the Global
Utilities Block. These boards will implement their own reboot
call, and not use this code, so we should only warn about the
absence of the GUTS RSTCR when the default reboot code is used.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Liang Li [Fri, 14 Aug 2009 14:36:14 +0000 (10:36 -0400)]
powerpc/85xx: sbc8560 - Fix warm reboot with board specific reset function
The existing fsl_rstcr_restart function is not applicable to the
mpc8560. The Global Utilities Block on this earlier CPU doesn't have
the control/reset register at 0xe00b0. This implements a board
specific reset function that uses the RCR(Reset Control Register) of
the sbc8560's EPLD to do a reset.
Signed-off-by: Liang Li <Liang.Li@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Paul Gortmaker [Wed, 12 Aug 2009 13:34:31 +0000 (09:34 -0400)]
powerpc/83xx: sbc8349 - update defconfig, enable MTD, USB storage
With flash partition entries in the DTS file, MTD might as well
be enabled in the defconfig. In a similar vein, enable USB and
enough related options (SCSI/ext2/ext3) so that a user can read
and write to a generic USB flash drive as well.
Also, this board only has the two default SOC UARTs, so adjust the
UART config accordingly.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Liang Li [Wed, 12 Aug 2009 13:34:30 +0000 (09:34 -0400)]
powerpc/83xx: Fix incorrect PCI interrupt map in SBC834x DTS
Allows interrupts to occur on the sbc834x. Currently PCI devices
get assigned an incorrect IRQ and so the interrupt count never
increases. This was tested with the 82546GB based dual port E1000
PCI-X NIC which uses two distinct IRQ lines on the one card.
Signed-off-by: Liang Li <liang.li@windriver.com> Signed-off-by: Yang Shi <yang.shi@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Liang Li [Wed, 12 Aug 2009 13:34:29 +0000 (09:34 -0400)]
powerpc/83xx: Add localbus node and MTD partitions for SBC834x
There is 8MB flash, 8kB EEPROM and 128MB SDRAM on the sbc834x
local bus, so add a localbus node in DTS with MTD partitions.
The recent U-boot commit fe613cdd4eb moves u-boot to the beginning
of flash, hence the legacy label on the partition at the end of flash.
Signed-off-by: Liang Li <liang.li@windriver.com> Signed-off-by: Yang Shi <yang.shi@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Liang Li [Wed, 12 Aug 2009 13:34:28 +0000 (09:34 -0400)]
powerpc/83xx: Remove second USB node from SBC834x DTS
Since only one of the SoC USB devices is brought out to a physical
connector on the board, remove the 2nd (USB-DR) node from the DTS.
Having it present and USB enabled will cause a hang at boot.
Signed-off-by: Liang Li <liang.li@windriver.com> Signed-off-by: Yang Shi <yang.shi@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Kumar Gala [Fri, 14 Aug 2009 14:38:34 +0000 (09:38 -0500)]
powerpc/booke: Move MMUCSR definition into mmu-book3e.h
The MMUCSR is now defined as part of the Book-3E architecture so we
can move it into mmu-book3e.h and add some of the additional bits
defined by the architecture specs.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Trond Myklebust [Mon, 24 Aug 2009 23:21:29 +0000 (19:21 -0400)]
NFSv4: Fix an infinite looping problem with the nfs4_state_manager
Commit 76db6d9500caeaa774a3e32a997eba30bbdc176b (nfs41: add session setup
to the state manager) introduces an infinite loop possibility in the NFSv4
state manager. By first checking nfs4_has_session() before clearing the
NFS4CLNT_SESSION_SETUP flag, it allows for a situation where someone sets
that flag, but it never gets cleared, and so the state manager loops.
In fact commit c3fad1b1aaf850bf692642642ace7cd0d64af0a3 (nfs41: add session
reset to state manager) causes this to happen every time we get a network
partition error.
Linus Torvalds [Mon, 24 Aug 2009 21:41:28 +0000 (14:41 -0700)]
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2:
ocfs2/dlm: Wait on lockres instead of erroring cancel requests
ocfs2: Add missing lock name
ocfs2: Don't oops in ocfs2_kill_sb on a failed mount
ocfs2: release the buffer head in ocfs2_do_truncate.
ocfs2: Handle quota file corruption more gracefully
Linus Torvalds [Mon, 24 Aug 2009 19:53:45 +0000 (12:53 -0700)]
Merge branch 'fixes' of git://git.marvell.com/orion
* 'fixes' of git://git.marvell.com/orion:
[ARM] Orion NAND: Make asm volatile avoid GCC pushing ldrd out of the loop
[ARM] Kirkwood: enable eSATA on QNAP TS-219P
[ARM] Kirkwood: __init requires linux/init.h
Hugh Dickins [Mon, 24 Aug 2009 15:30:28 +0000 (16:30 +0100)]
mm: fix hugetlb bug due to user_shm_unlock call
2.6.30's commit 8a0bdec194c21c8fdef840989d0d7b742bb5d4bc removed
user_shm_lock() calls in hugetlb_file_setup() but left the
user_shm_unlock call in shm_destroy().
In detail:
Assume that can_do_hugetlb_shm() returns true and hence user_shm_lock()
is not called in hugetlb_file_setup(). However, user_shm_unlock() is
called in any case in shm_destroy() and in the following
atomic_dec_and_lock(&up->__count) in free_uid() is executed and if
up->__count gets zero, also cleanup_user_struct() is scheduled.
Note that sched_destroy_user() is empty if CONFIG_USER_SCHED is not set.
However, the ref counter up->__count gets unexpectedly non-positive and
the corresponding structs are freed even though there are live
references to them, resulting in a kernel oops after a lots of
shmget(SHM_HUGETLB)/shmctl(IPC_RMID) cycles and CONFIG_USER_SCHED set.
Hugh changed Stefan's suggested patch: can_do_hugetlb_shm() at the
time of shm_destroy() may give a different answer from at the time
of hugetlb_file_setup(). And fixed newseg()'s no_id error path,
which has missed user_shm_unlock() ever since it came in 2.6.9.
Reported-by: Stefan Huber <shuber2@gmail.com> Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Tested-by: Stefan Huber <shuber2@gmail.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
smc91x: let smc91x work well under netpoll
pxaficp-ir: remove incorrect net_device_ops
NET: llc, zero sockaddr_llc struct
drivers/net: fixed drivers that support netpoll use ndo_start_xmit()
netpoll: warning for ndo_start_xmit returns with interrupts enabled
net: Fix Micrel KSZ8842 Kconfig description
netfilter: xt_quota: fix wrong return value (error case)
ipv6: Fix commit 63d9950b08184e6531adceb65f64b429909cc101 (ipv6: Make v4-mapped bindings consistent with IPv4)
E100: fix interaction with swiotlb on X86.
pkt_sched: Convert CBQ to tasklet_hrtimer.
pkt_sched: Convert qdisc_watchdog to tasklet_hrtimer
rtl8187: always set MSR_LINK_ENEDCA flag with RTL8187B
ibm_newemac: emac_close() needs to call netif_carrier_off()
net: fix ks8851 build errors
net: Rename MAC platform driver for w90p910 platform
yellowfin: Fix buffer underrun after dev_alloc_skb() failure
orinoco: correct key bounds check in orinoco_hw_get_tkip_iv
mac80211: fix todo lock
Linus Torvalds [Mon, 24 Aug 2009 19:24:01 +0000 (12:24 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
ima: hashing large files bug fix
kernel_read: redefine offset type
Amerigo Wang [Fri, 21 Aug 2009 08:34:45 +0000 (04:34 -0400)]
x86: Fix an incorrect argument of reserve_bootmem()
This line looks suspicious, because if this is true, then the
'flags' parameter of function reserve_bootmem_generic() will be
unused when !CONFIG_NUMA. I don't think this is what we want.
Signed-off-by: WANG Cong <amwang@redhat.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: akpm@linux-foundation.org
LKML-Reference: <20090821083709.5098.52505.sendpatchset@localhost.localdomain> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Simon Kagstrom [Thu, 20 Aug 2009 07:19:53 +0000 (09:19 +0200)]
[ARM] Orion NAND: Make asm volatile avoid GCC pushing ldrd out of the loop
GCC 4.3.3 and 4.4.1 happily moves the dword load instruction out of the
loop in orion_nand_read_buf. This patch makes the instruction volatile
to avoid the issue. I've discussed this at gcc-help, refer to the thread
at
John Holland [Wed, 19 Aug 2009 23:24:03 +0000 (13:24 -1000)]
[ARM] Kirkwood: enable eSATA on QNAP TS-219P
Initialize PCI/PCIe on the QNAP TS-119, TS-219 and TS-219P hardware
allowing the use of the discrete eSATA controller connected to the PCIe
bus in the TS-219P.
Signed-off-by: John Holland <john.holland@cellent-fs.de> Tested-by: Thomas Reitmayr <treitmayr@devbase.at> Signed-off-by: Martin Michlmayr <tbm@cyrius.com> Signed-off-by: Nicolas Pitre <nico@marvell.com>
Martin Michlmayr [Tue, 18 Aug 2009 09:34:10 +0000 (23:34 -1000)]
[ARM] Kirkwood: __init requires linux/init.h
Include linux/init.h for __init to fix this error:
CC [M] drivers/net/wireless/wl12xx/boot.o
In file included from arch/arm/mach-kirkwood/include/mach/gpio.h:13,
from arch/arm/include/asm/gpio.h:5,
from include/linux/gpio.h:7,
from drivers/net/wireless/wl12xx/boot.c:24:
arch/arm/plat-orion/include/plat/gpio.h:32: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘orion_gpio_init’
make[6]: *** [drivers/net/wireless/wl12xx/boot.o] Error 1
make[5]: *** [drivers/net/wireless/wl12xx] Error 2
Signed-off-by: Martin Michlmayr <tbm@cyrius.com> Signed-off-by: Nicolas Pitre <nico@marvell.com>
Jan Kara [Mon, 24 Aug 2009 14:38:43 +0000 (16:38 +0200)]
ext3: Improve error message that changing journaling mode on remount is not possible
This patch makes the error message about changing journaling mode on remount
more descriptive. Some people are going to hit this error now due to commit bbae8bcc49bc4d002221dab52c79a50a82e7cd1f if they configure a kernel to default
to data=writeback mode. The problem happens if they have data=ordered set for
the root filesystem in /etc/fstab but not in the kernel command line (and they
don't use initrd). Their filesystem then gets mounted as data=writeback by
kernel but then their boot fails because init scripts won't be able to remount
the filesystem rw. Better error message will hopefully make it easier for them
to find the error in their setup and bother us less with error reports :).
Theodore Ts'o [Mon, 10 Aug 2009 20:03:43 +0000 (16:03 -0400)]
ext3: Update Kconfig description of EXT3_DEFAULTS_TO_ORDERED
The old description for this configuration option was perhaps not
completely balanced in terms of describing the tradeoffs of using a
default of data=writeback vs. data=ordered. Despite the fact that old
description very strongly recomended disabling this feature, all of
the major distributions have elected to preserve the existing 'legacy'
default, which is a strong hint that it perhaps wasn't telling the
whole story.
This revised description has been vetted by a number of ext3
developers as being better at informing the user about the tradeoffs
of enabling or disabling this configuration feature.
Cc: linux-ext4@vger.kernel.org Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Jan Kara <jack@suse.cz>
Dongdong Deng [Mon, 24 Aug 2009 05:59:04 +0000 (22:59 -0700)]
smc91x: let smc91x work well under netpoll
The NETPOLL requires that interrupts remain disabled in its callbacks.
Using *_irq_save()/irq_restore() to replace *_irq_disable()/irq_enable()
functions in NETPOLL's callbacks of smc91x, so that it doesn't enable
interrupts when already disabled, and kgdboe/netconsole would work
properly over smc91x.
Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com> Acked-by: Nicolas Pitre <nico@cam.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Marek Vasut [Mon, 24 Aug 2009 05:57:30 +0000 (22:57 -0700)]
pxaficp-ir: remove incorrect net_device_ops
This patch fixes broken pxaficp-ir. The problem was in incorrect
net_device_ops being specified which prevented the driver from
operating. The symptoms were:
- failing ifconfig for IrLAN, resulting in
SIOCSIFFLAGS: Cannot assign requested address
- irattach working for IrCOMM, but the port stayed disabled
Moreover this patch corrects missing sysfs device link.
Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Dongdong Deng [Mon, 24 Aug 2009 02:49:07 +0000 (19:49 -0700)]
drivers/net: fixed drivers that support netpoll use ndo_start_xmit()
The NETPOLL API requires that interrupts remain disabled in
netpoll_send_skb(). The use of "A functions set" in the NETPOLL API
callbacks causes the interrupts to get enabled and can lead to kernel
instability.
The solution is to use "B functions set" to prevent the irqs from
getting enabled while in netpoll_send_skb().
A functions set:
local_irq_disable()/local_irq_enable()
spin_lock_irq()/spin_unlock_irq()
spin_trylock_irq()/spin_unlock_irq()
B functions set:
local_irq_save()/local_irq_restore()
spin_lock_irqsave()/spin_unlock_irqrestore()
spin_trylock_irqsave()/spin_unlock_irqrestore()
Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com> Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Dongdong Deng [Fri, 21 Aug 2009 03:33:36 +0000 (03:33 +0000)]
netpoll: warning for ndo_start_xmit returns with interrupts enabled
WARN_ONCE for ndo_start_xmit() enable interrupts in netpoll_send_skb(),
because the NETPOLL API requires that interrupts remain disabled in
netpoll_send_skb().
Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com> Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Andreas Mohr [Fri, 21 Aug 2009 00:46:06 +0000 (00:46 +0000)]
net: Fix Micrel KSZ8842 Kconfig description
Signed-off-by: Andreas Mohr <andi@lisas.de> Acked-by: Richard Röjfors <richard.rojfors.ext@mocean-labs.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Patrick McHardy [Thu, 20 Aug 2009 02:47:34 +0000 (02:47 +0000)]
netfilter: xt_quota: fix wrong return value (error case)
Success was indicated on a memory allocation failure, thereby causing
a crash due to a later NULL deref.
(Affects v2.6.30-rc1 up to here.)
Signed-off-by: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 63d9950b08184e6531adceb65f64b429909cc101
(ipv6: Make v4-mapped bindings consistent with IPv4)
changes behavior of inet6_bind() for v4-mapped addresses so it should
behave the same way as inet_bind().
During this change setting of err to -EADDRNOTAVAIL got lost:
Krzysztof Hałasa [Mon, 24 Aug 2009 02:02:13 +0000 (19:02 -0700)]
E100: fix interaction with swiotlb on X86.
E100 places it's RX packet descriptors inside skb->data and uses them
with bidirectional streaming DMA mapping. Data in descriptors is
accessed simultaneously by the chip (writing status and size when
a packet is received) and CPU (reading to check if the packet was
received). This isn't a valid usage of PCI DMA API, which requires use
of the coherent (consistent) memory for such purpose. Unfortunately e100
chips working in "simplified" RX mode have to store received data
directly after the descriptor. Fixing the driver to conform to the API
would require using unsupported "flexible" RX mode or receiving data
into a coherent memory and using CPU to copy it to network buffers.
This patch, while not yet making the driver conform to the PCI DMA API,
allows it to work correctly on X86 with swiotlb (while not breaking
other architectures).
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
ALSA: ali5451: fix timeout handling in snd_ali_{codecs,timer}_ready()
Modify loops in such way that the register value is checked also after
the timeout condition, just in case the heavy interrupt load etc. caused
the thread to sleep for the time period exceeding the timeout value.
While at it remove an extra ALI_STIMER read from snd_ali_stimer_ready().
setup_arch() unconditionally sets the preferred console to ttyS.
This breaks the use of 3270 devices as the console. Provide a new
function to set the default preferred console for s390. The preferred
console depends on the conmode parameter that is used to switch
between 3270 and 3215 terminal/console mode.
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sebastian Ott [Sun, 23 Aug 2009 16:09:04 +0000 (18:09 +0200)]
[S390] cio: fix double free after failed device initialization
If io_subchannel_initialize_dev fails it will release the only
reference to the ccw device therefore the caller should not
kfree this device since this is done in the release function.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
[SCSI] mpt2sas: fix config request and diag reset deadlock
[SCSI] mpt2sas: Bump driver version 01.100.04.00
[SCSI] mpt2sas: fix oops because drv data points to NULL on resume from hibernate
[SCSI] mpt2sas: fix crash due to Watchdog is active while OS in standby mode
[SCSI] mpt2sas: fix infinite loop inside config request
[SCSI] mpt2sas: Excessive log info causes sas iounit page time out
[SCSI] mpt2sas: Raid 10 Value is showing as Raid 1E in /va/log/messages
[SCSI] mpt2sas: Expander fix oops saying "Already part of another port"
[SCSI] mpt2sas: Introduced check for enclosure_handle to avoid crash
Linus Torvalds [Sat, 22 Aug 2009 00:40:08 +0000 (17:40 -0700)]
Re-introduce page mapping check in mark_buffer_dirty()
In commit a8e7d49aa7be728c4ae241a75a2a124cdcabc0c5 ("Fix race in
create_empty_buffers() vs __set_page_dirty_buffers()"), I removed a test
for a NULL page mapping unintentionally when some of the code inside
__set_page_dirty() was moved to the callers.
That removal generally didn't matter, since a filesystem would serialize
truncation (which clears the page mapping) against writing (which marks
the buffer dirty), so locking at a higher level (either per-page or an
inode at a time) should mean that the buffer page would be stable. And
indeed, nothing bad seemed to happen.
Except it turns out that apparently reiserfs does something odd when
under load and writing out the journal, and we have a number of bugzilla
entries that look similar:
and it looks like reiserfs depended on that check (the common theme
seems to be "data=journal", and a journal writeback during a truncate).
I suspect reiserfs should have some additional locking, but in the
meantime this should get us back to the pre-2.6.29 behavior.
Pattern-pointed-out-by: Roland Kletzing <devzero@web.de> Cc: stable@kernel.org (2.6.29 and 2.6.30) Cc: Jeff Mahoney <jeffm@suse.com> Cc: Nick Piggin <npiggin@suse.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Fri, 21 Aug 2009 17:45:09 +0000 (10:45 -0700)]
Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/radeon: add GET_PARAM/INFO support for Z pipes
drm/radeon/kms: add r100/r200 OQ support.
drm: Fix sysfs device confusion.
drm/radeon/kms: implement the bo busy ioctl properly.
Linus Torvalds [Fri, 21 Aug 2009 16:48:10 +0000 (09:48 -0700)]
x86: don't call '->send_IPI_mask()' with an empty mask
As noted in 83d349f35e1ae72268c5104dbf9ab2ae635425d4 ("x86: don't send
an IPI to the empty set of CPU's"), some APIC's will be very unhappy
with an empty destination mask. That commit added a WARN_ON() for that
case, and avoided the resulting problem, but didn't fix the underlying
reason for why those empty mask cases happened.
This fixes that, by checking the result of 'cpumask_andnot()' of the
current CPU actually has any other CPU's left in the set of CPU's to be
sent a TLB flush, and not calling down to the IPI code if the mask is
empty.
The reason this started happening at all is that we started passing just
the CPU mask pointers around in commit 4595f9620 ("x86: change
flush_tlb_others to take a const struct cpumask"), and when we did that,
the cpumask was no longer thread-local.
Before that commit, flush_tlb_mm() used to create it's own copy of
'mm->cpu_vm_mask' and pass that copy down to the low-level flush
routines after having tested that it was not empty. But after changing
it to just pass down the CPU mask pointer, the lower level TLB flush
routines would now get a pointer to that 'mm->cpu_vm_mask', and that
could still change - and become empty - after the test due to other
CPU's having flushed their own TLB's.
See
http://bugzilla.kernel.org/show_bug.cgi?id=13933
for details.
Tested-by: Thomas Björnell <thomas.bjornell@gmail.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
rtl8187: always set MSR_LINK_ENEDCA flag with RTL8187B
RTL8187B always needs MSR_LINK_ENEDCA flag to be set even when it is in
no link mode, otherwise it'll not be able to associate when this flag is
not set after the change "mac80211: fix managed mode BSSID handling".
By accident, setting BSSID of AP before association makes 8187B to
successfuly associate even when ENEDCA flag isn't set, which was the
case before the mac80211 change. But now the BSSID of AP we are trying
to associate is only available after association is successful, and
any attempt to associate without the needed flag doesn't work.
Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br> Tested-by: Larry Finger <Larry.Finger@lwfinger.net> Acked-by: Hin-Tak Leung <htl10@users.sourceforge.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Linus Torvalds [Fri, 21 Aug 2009 16:26:15 +0000 (09:26 -0700)]
Make bitmask 'and' operators return a result code
When 'and'ing two bitmasks (where 'andnot' is a variation on it), some
cases want to know whether the result is the empty set or not. In
particular, the TLB IPI sending code wants to do cpumask operations and
determine if there are any CPU's left in the final set.
So this just makes the bitmask (and cpumask) functions return a boolean
for whether the result has any bits set.
Linus Torvalds [Fri, 21 Aug 2009 16:23:57 +0000 (09:23 -0700)]
x86: don't send an IPI to the empty set of CPU's
The default_send_IPI_mask_logical() function uses the "flat" APIC mode
to send an IPI to a set of CPU's at once, but if that set happens to be
empty, some older local APIC's will apparently be rather unhappy. So
just warn if a caller gives us an empty mask, and ignore it.
This fixes a regression in 2.6.30.x, due to commit 4595f9620 ("x86:
change flush_tlb_others to take a const struct cpumask"), documented
here:
http://bugzilla.kernel.org/show_bug.cgi?id=13933
which causes a silent lock-up. It only seems to happen on PPro, P2, P3
and Athlon XP cores. Most developers sadly (or not so sadly, if you're
a developer..) have more modern CPU's. Also, on x86-64 we don't use the
flat APIC mode, so it would never trigger there even if the APIC didn't
like sending an empty IPI mask.
Reported-by: Pavel Vilim <wylda@volny.cz> Reported-and-tested-by: Thomas Björnell <thomas.bjornell@gmail.com> Reported-and-tested-by: Martin Rogge <marogge@onlinehome.de> Cc: Mike Travis <travis@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The oops did not reveal any more details about the real stack
that we have and the system got into an infinite loop of
recursive pagefaults.
So i booted with CONFIG_STACK_TRACER=y and the 'stacktrace' boot
parameter. The box did not crash (timings/conditions probably
changed a tiny bit to trigger the catastrophic crash), but the
/debug/tracing/stack_trace file was rather revealing:
There's a lot of fat functions on that stack trace, but
the largest of all is do_one_initcall(). This is due to
the boot trace entry variables being on the stack.
Fixing this is relatively easy, initcalls are fundamentally
serialized, so we can move the local variables to file scope.
Note that this large stack footprint was present for a
couple of months already - what pushed my system over
the edge was the addition of kmemleak to the call-chain:
Casey Dahlin [Thu, 20 Aug 2009 23:27:56 +0000 (16:27 -0700)]
lib/swiotlb.c: Fix strange panic message selection logic when swiotlb fills up
swiotlb_full() in lib/swiotlb.c throws one of two panic messages
based on whether the direction of transfer is from the device
or to the device. The logic around this is somewhat weird in
the case of bidirectional transfers. It appears to want to
throw both in succession, but since its a panic only the first
makes it.
This patch adds a third, separate error for DMA_BIDIRECTIONAL
to make things a bit clearer.
Signed-off-by: Casey Dahlin <cdahlin@redhat.com> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Becky Bruce <beckyb@kernel.crashing.org>
[ further fixed the error message ] Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <200908202327.n7KNRuqK001504@imap1.linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Node may not be inserted over existing node. This causes inode tree
corruption and I was seeing crashes in inode_tree_del which I can not
reproduce after this patch.
The other way to fix this would be to tie inode lifetime in the rbtree
with inode while not in freeing state. I had a look at this but it is
not so trivial at this point. At least this patch gets things working again.
Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Chris Mason <chris.mason@oracle.com> Acked-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
While it's debatable whether or not a NULL device argument to
the DMA API functions is valid... since it certainly isn't
valid on devices with an IOMMU... dma-debug really shouldn't be
dereferencing null pointers either.
Guard against that in err_printk and the driver_filter
functions. A Fedora rawhide user was seeing this in one of the
dvb drivers resulting in an oops on boot.
[ A patch has been sent for testing to the driver, but I feel
the dma debugging support should be fixed as well. (There's
still a pile of legacy garbage in the kernel passing null
pointers to dma_{alloc,free}_*. :( ]
Sometimes, when using the touchscreen, it stops working till next restart
and the following message is printed:
ucb1400: unexpected IE_STATUS = 0x0
The following patch retriggers the touchscreen interrupt unconditionally.
This prevents hanging of the touchscreen in case of bogus interrupt
occurence.
Signed-off-by: Pavel Revak <palo@bielyvlk.sk> Acked-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Marek Vasut [Fri, 21 Aug 2009 05:05:53 +0000 (22:05 -0700)]
Input: ucb1400_ts - enable ADC Filter
This patch enables ADC filtering on UCB1400 codec by default. The
benefit from this change is mostly on some Colibri boards where
the ADCSYNC pin of the UCB1400 codec isn't connected causing the
touchscreen to jitter very badly. This change has no visible
effect on boards where the ADCSYNC pin is connected.
ocfs2/dlm: Wait on lockres instead of erroring cancel requests
In case a downconvert is queued, and a flock receives a signal,
BUG_ON(lockres->l_action != OCFS2_AST_INVALID) is triggered
because a lock cancel triggers a dlmunlock while an AST is
scheduled.
To avoid this, allow a LKM_CANCEL to pass through, and let it
wait on __dlm_wait_on_lockres().
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de> Acked-off-by: Mark Fasheh <mfasheh@suse.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
Thomas Hellstrom [Thu, 20 Aug 2009 09:02:31 +0000 (19:02 +1000)]
drm: Fix sysfs device confusion.
The drm sysfs class suspend / resume methods could not distinguish
between different device types wich could lead to illegal type casts.
Use struct device_type and make sure the class suspend / resume callbacks
are aware of those. There is no per device-type suspend / resume. Only
new-style PM.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Dave Airlie <airlied@redhat.com>
Jan Kara [Thu, 20 Aug 2009 16:26:52 +0000 (18:26 +0200)]
ocfs2: Add missing lock name
There is missing name for NFSSync cluster lock. This makes lockdep unhappy
because we end up passing NULL to lockdep when initializing lock key. Fix it.
Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Joel Becker <joel.becker@oracle.com>
Jan Beulich [Thu, 20 Aug 2009 15:14:15 +0000 (16:14 +0100)]
x86: add vmlinux.lds to targets in arch/x86/boot/compressed/Makefile
The absence of vmlinux.lds here keeps .vmlinux.lds.cmd from being
included, which in turn leads to it and all its dependents always
getting rebuilt independent of whether they are already up-to-date.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <4A8D84670200007800010D31@vpn.id2.novell.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Linus Torvalds [Thu, 20 Aug 2009 21:55:24 +0000 (14:55 -0700)]
Merge branch 'i2c-fixes-rc6' of git://aeryn.fluff.org.uk/bjdooks/linux
* 'i2c-fixes-rc6' of git://aeryn.fluff.org.uk/bjdooks/linux:
i2c-stu300: I2C STU300 stability updates
i2c-omap: Enable workaround for Errata 1.153 based on
i2c-omap: ACK pending [R/X]DR and [R/X]RDY interrupts
i2c-omap: Fix I2C status ACK
projects / linux-beck.git / log