The Blackfin serial headers were inverting the CTS value leading to wrong
handling of the CTS line which broke CTS/RTS handling completely.
Signed-off-by: NSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

This anomaly only applies to the BF527-0.1, not the BF526-0.1, and not any
other revision of the BF527.  So make sure we don't go returning 0xffff
for other cases.
Signed-off-by: NGraf Yang <graf.yang@analog.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

The early logic to locate a free DMA channel and then set it up was broken
in a few ways that only manifested itself when we needed to set up more
than 2 on chip SRAM regions (most board defaults setup 1 or 2).  First, we
checked the wrong status register (the destination gets updated, not the
source) and second, we did the ssync before rather than after resetting a
DMA config register.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

Rather than assume Core B is always run with caches turned on, let people
load into any of the on-chip memory regions.  It is their business how the
SRAM/Cache regions are utilized, so don't prevent them from being able to
load into them.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

The code used in the Blackfin lshrdi3 utilizes gcc constructs.  However,
the structures declared don't line up with the code gcc generates, so
under certain optimizations, we get bad code and things crap out in fun
random ways.  So rather than trying to maintain different gcc definitions
ourselves, just use the ones available in gcclib.h.

URL: http://blackfin.uclinux.org/gf/tracker/5286Signed-off-by: NJie Zhang <jie.zhang@analog.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

Since we need to relocate the attached filesystem with the uClinux MTD map
(to handle some anomalies), we need to know its real filesize.  If we boot
a kernel without a filesystem actually attached, we end up blindly reading
and copying garbage (since there is no magic value to detect validity).
Often times this results in an early crash and no output.  So add a few
basic sanity checks before operating on things to catch the majority of
cases.
Signed-off-by: NRobin Getz <robin.getz@analog.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

Previous unification code put the exception banner behind the "is oops"
logic when it should have been printed all the time.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

Add missing anomaly workaround for anomaly 05000281 - we can't return to
instructions which cause hardware errors otherwise we trigger the error
again which means we go into an infinite loop of handling, returning, and
retriggering.  This work around confuses gdb when the error occurs as the
PC will seemed to have moved, so a better long term fix will need to be
figured out, but for now this is better than an infinite crash loop.
Signed-off-by: NRobin Getz <robin.getz@analog.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

Signed-off-by: NGraf Yang <graf.yang@analog.com>
Signed-off-by: NCliff Cai <cliff.cai@analog.com>
Signed-off-by: NRobin Getz <robin.getz@analog.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

There are no CONFIG_{BLK,CHR}_DEV_FLASH Kconfig options, and there is no
flash_probe() function, so not really sure what this code is all about.
Seems to be dead code that stretches way back to the start of the Blackfin
port.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

Improve the assembly with a few explanatory comments and use symbolic
defines rather than numeric values for bit positions.
Signed-off-by: NRobin Getz <robin.getz@analog.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

when building 32-bit, I see this ..
arch/x86/kernel/pvclock.c:63:7: warning: "__x86_64__" is not defined
Signed-off-by: NDave Jones <davej@redhat.com>
LKML-Reference: <20090713201437.GA12165@redhat.com>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

Remove duplicated #include('s) in
  arch/mn10300/kernel/sys_mn10300.c
Signed-off-by: NHuang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The variable apic_numaq placed in noninit section references the
function wakeup_secondary_cpu_via_nmi(), which is in __cpuinit
section. Thus causes a section mismatch warning. To avoid such
mismatch we mark apic_numaq as __refdata.

We were warned by the following warning:

  WARNING: arch/x86/kernel/built-in.o(.data+0x932c): Section mismatch in
  reference from the variable apic_numaq to the function
  .cpuinit.text:wakeup_secondary_cpu_via_nmi()
Signed-off-by: NRakib Mullick <rakib.mullick@gmail.com>
LKML-Reference: <b9df5fa10907120407p6b4f67dtf4d563155488188a@mail.gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

The variable apic_es7000_cluster references the function __cpuinit
wakeup_secondary_cpu_via_mip() from a noninit section. So we've been
warned by the following warning. To avoid possible collision between
init/noninit, its best to mark the variable as __refdata.

We were warned by the following warning:

  LD      arch/x86/kernel/apic/built-in.o
  WARNING: arch/x86/kernel/apic/built-in.o(.data+0x198c): Section
  mismatch in reference from the variable apic_es7000_cluster to the
  function .cpuinit.text:wakeup_secondary_cpu_via_mip()
Signed-off-by: NRakib Mullick <rakib.mullick@gmail.com>
LKML-Reference: <b9df5fa10907120404k6279a10ch5e9682432272706f@mail.gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

The name size limit is gone from the driver-core, the BUS_ID_SIZE
value will be removed.

Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: NKay Sievers <kay.sievers@vrfy.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

* Remove smp_lock.h from files which don't need it (including some headers!)
* Add smp_lock.h to files which do need it
* Make smp_lock.h include conditional in hardirq.h
  It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT

  This will make hardirq.h inclusion cheaper for every PREEMPT=n config
  (which includes allmodconfig/allyesconfig, BTW)
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Since commit 5fd29d6c ("printk: clean up handling of log-levels
and newlines"), the kernel logs segfaults like:

    <6>gnome-power-man[24509]: segfault at 20 ip 00007f9d4950465a sp 00007fffbb50fc70 error 4 in libgobject-2.0.so.0.2103.0[7f9d494f7000+45000]

with the extra "<6>" being KERN_INFO.  This happens because the
printk in show_signal_msg() started with KERN_CONT and then
used "%s" to pass in the real level; and KERN_CONT is no longer
an empty string, and printk only pays attention to the level at
the very beginning of the format string.

Therefore, remove the KERN_CONT from this printk, since it is
now actively causing problems (and never really made any
sense).
Signed-off-by: NRoland Dreier <roland@digitalvampire.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <874otjitkj.fsf@shaolin.home.digitalvampire.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Pull the initial preempt_count value into a single
definition site.

Maintainers for: alpha, ia64 and m68k, please have a look,
your arch code is funny.

The header magic is a bit odd, but similar to the KERNEL_DS
one, CPP waits with expanding these macros until the
INIT_THREAD_INFO macro itself is expanded, which is in
arch/*/kernel/init_task.c where we've already included
sched.h so we're good.

Cc: tony.luck@intel.com
Cc: rth@twiddle.net
Cc: geert@linux-m68k.org
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: NMatt Mackall <mpm@selenic.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Commit 1faa16d2 accidentally broke
the bdi congestion wait queue logic, causing us to wait on congestion
for WRITE (== 1) when we really wanted BLK_RW_ASYNC (== 0) instead.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

The short name of the achitecture is 'arch_perfmon'. This patch
changes the kernel parameter to use this name.

Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: NRobert Richter <robert.richter@amd.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Adding smp_mb__after_lock define to be used as a smp_mb call after
a lock.

Making it nop for x86, since {read|write|spin}_lock() on x86 are
full memory barriers.
Signed-off-by: NJiri Olsa <jolsa@redhat.com>
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Alex found that specjbb2005 still can not run with hugepages on an
x86-64 machine.  This only happens when numa is not compiled in.

The root cause: node_set_state will not set it back for us in that case,
so don't clear that when numa is not select in config

[ v2: use node_clear_state instead ]
Reported-and-Tested-by: NAlex Shi <alex.shi@intel.com>
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Reviewed-by: NChristoph Lameter <cl@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Commit 5fd29d6c ("printk: clean up
handling of log-levels and newlines") changed printk semantics.  printk
lines with multiple KERN_<level> prefixes are no longer emitted as
before the patch.

<level> is now included in the output on each additional use.

Remove all uses of multiple KERN_<level>s in formats.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Patch 08687aec71bc9134fe336e561f6did877bacf74fc0a (x86: unify
power/cpu_(32|64).c)  renamed cpu_32.c to cpu.c, but did not update
the special compilation flags for the file for the new name.

This patch fixes the compilation flags, and therefore fixes resume
from suspend on my Acer Aspire One.

[rjw: The regression from 2.6.30 fixed by this patch is tracked as
 http://bugzilla.kernel.org/show_bug.cgi?id=13661]
Signed-off-by: NPeter Chubb <peterc@nicta.com.au>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

This patch fixes various badnesses like this for all interrupt
controllers:

------------[ cut here ]------------
Badness at c04db9dc [verbose debug info unavailable]
NIP: c04db9dc LR: c04db9ac CTR: 00000000
REGS: c053de30 TRAP: 0700   Not tainted  (2.6.31-rc1-00432-ge69b2b5-dirty)
MSR: 00021000 <ME,CE>  CR: 22020084  XER: 00000000
TASK = c0500480[0] 'swapper' THREAD: c053c000
GPR00: 00000001 c053dee0 c0500480 00000000 00000050 00000020 3fffffff 00000000
GPR08: 00000001 c0540000 e0080080 00000000 22000084 64183600 3ff8f800 00000000
GPR16: 841b0240 449a0303 00000000 00000000 00000000 00000000 00000000 c04f5bf4
GPR24: 00000000 00000000 00000000 00000050 00000020 00000000 3fffffff 00000050
NIP [c04db9dc] alloc_arch_preferred_bootmem+0x48/0x74
LR [c04db9ac] alloc_arch_preferred_bootmem+0x18/0x74
Call Trace:
[c053dee0] [c000a5a4] __of_address_to_resource+0x44/0xd0 (unreliable)
[c053def0] [c04dba58] ___alloc_bootmem_nopanic+0x50/0x108
[c053df20] [c04dbb28] ___alloc_bootmem+0x18/0x50
[c053df30] [c04d5de0] qe_ic_init+0x5c/0x1b0
[c053df70] [c04d77b0] mpc85xx_mds_pic_init+0xb8/0x10c
[c053dfb0] [c04cf374] init_IRQ+0x28/0x3c

p.s. commit 85355bb2 ("powerpc: Fix
mpic alloc warning") missed some alloc_bootmem() instances, this is
now fixed.
Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: NTimur Tabi <timur@freescale.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Current implementation of spin_event_timeout can be interrupted by an
IRQ or context switch after testing the condition, but before checking
the timeout.  This can cause the loop to report a timeout when the
condition actually became true in the middle.

This patch adds one final check of the condition upon exit of the loop
if the last test of the condition was still false.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NTimur Tabi <timur@freescale.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

pr_debug() can now result in code being generated even when DEBUG
is not defined. That's not really desirable in some places.

With CONFIG_DYNAMIC_DEBUG=y:

size before:
   text    data     bss     dec     hex filename
   2036     368       8    2412     96c arch/powerpc/mm/pgtable.o

size after:
   text    data     bss     dec     hex filename
   1677     248       8    1933     78d arch/powerpc/mm/pgtable.o
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

pr_debug() can now result in code being generated even when DEBUG
is not defined. That's not really desirable in some places.

With CONFIG_DYNAMIC_DEBUG=y:

size before:
   text    data     bss     dec     hex filename
   7083    1616       0    8699    21fb arch/powerpc/../axon_msi.o

size after:
   text    data     bss     dec     hex filename
   5772    1208       0    6980    1b44 arch/powerpc/../axon_msi.o
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

pr_debug() can now result in code being generated even when DEBUG
is not defined. That's not really desirable in some places.

With CONFIG_DYNAMIC_DEBUG=y:

size before:
   text    data     bss     dec     hex filename
   3252     384       0    3636     e34 arch/powerpc/mm/gup.o

size after:
   text    data     bss     dec     hex filename
   2576      96       0    2672     a70 arch/powerpc/mm/gup.o
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

pr_debug() can now result in code being generated even when DEBUG
is not defined. That's not really desirable in some places.

With CONFIG_DYNAMIC_DEBUG=y:

size before:
   text    data     bss     dec     hex filename
   3261     416       4    3681     e61 arch/powerpc/mm/slb.o

size after:
   text    data     bss     dec     hex filename
   2861     248       4    3113     c29 arch/powerpc/mm/slb.o
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Remove duplicated #include('s) in
  arch/powerpc/kernel/mpc7450-pmu.c
  arch/powerpc/kernel/ppc970-pmu.c
Signed-off-by: NHuang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

pr_debug() can now result in code being generated even when DEBUG
is not defined. That's not really desirable in some places.

With CONFIG_DYNAMIC_DEBUG=y:

size before:
   text	   data	    bss	    dec	    hex	filename
   1508	     48	     28	   1584	    630	powerpc/mm/mmu_context_nohash.o

size after:
   text	   data	    bss	    dec	    hex	filename
   1088	      0	     28	   1116	    45c	powerpc/mm/mmu_context_nohash.o
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

pr_debug() can now result in code being generated even when DEBUG
is not defined. That's not really desirable in some places.

With CONFIG_DYNAMIC_DEBUG=y:

size before:
   text    data     bss     dec     hex filename
   7720    5488     296   13504    34c0 platforms/pseries/xics.o

size after:
   text    data     bss     dec     hex filename
   7535	   5456	    296	  13287	   33e7	platforms/pseries/xics.o
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Signed-off-by: NJoe Perches <joe@perches.com>
Acked-by: NGeoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

pr_debug() can now result in code being generated even when DEBUG
is not defined. That's not really desirable in some places.

In particular, pSeries_lpar_hpte_insert() goes from 185 instructions
to 77 instructions as a result of this patch. Luckily that code
isn't called very often ...

With CONFIG_DYNAMIC_DEBUG=y:

size before:
   text    data     bss     dec     hex filename
   7284    1552     296    9132    23ac platforms/pseries/lpar.o

size after:
   text    data     bss     dec     hex filename
   5806    1096     296    7198    1c1e platforms/pseries/lpar.o
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

32-bit s390 has efficient support for 64/32-bit conversions, define
KTIME_SCALAR to enable the use of the plain scalar nanosecond based
representation of ktime.
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

Performance counters need 64 bit atomic operations.
To keep the patch small we use the simple generic atomic64_t implementation.
The native implementation follows with the next kernel.

Fixes this build bug:

In file included from kernel/sched.c:42:
include/linux/perf_counter.h:427: error: expected specifier-qualifier-list before 'atomic64_t'
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

The frame pointer is useless for s390 in the sched.c code.
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

Provide __ucmpdi2() helper function on 31 bit so we don't run
again and again in compile errors like this one:

kernel/built-in.o: In function `T.689':
perf_counter.c:(.text+0x56c86): undefined reference to `__ucmpdi2'
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>