| Commit message (Collapse) | Author | Age |
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The spurious IRQ testing in request_irq is mishandled in um_request_irq, which
sets the incoming file descriptors non-blocking only after request_irq
succeeds. This results in the spurious irq calling read on a blocking
descriptor, and a hang.
Fixed by reversing the O_NONBLOCK setting and the request_irq call.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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[akpm@linux-foundation.org: coding-style cleanups]
Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Cc: Mikael Starvik <starvik@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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i386 and x86-64 registers System RAM as IORESOURCE_MEM | IORESOURCE_BUSY.
But ia64 registers it as IORESOURCE_MEM only.
In addition, memory hotplug code registers new memory as IORESOURCE_MEM too.
This difference causes a failure of memory unplug of x86-64. This patch
fixes it.
This patch adds IORESOURCE_BUSY to avoid potential overlap mapping by PCI
device.
Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Luck, Tony" <tony.luck@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Stupid bug - we need to compare the return value of recvmsg to the value of
iov_len, not its size. This caused port_helper processes not to be killed on
shutdown on x86_64 because the pids weren't being passed out properly.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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symlinks to directories in the non-O= case were lacking -n, which meant
that, when the link already existed, a new link pointing at itself was
created in the target directory.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6:
hwmon: (i5k_amb) Convert macros to C functions
hwmon: (w83781d) Add missing curly braces
hwmon: (abituguru3) Identify ABit IP35 Pro as such
hwmon: (f75375s) pwmX_mode sysfs files writable for f75375 variant
hwmon: (f75375s) On n2100 systems, set fans to full speed on boot
hwmon: (f75375s) Allow setting up fans with platform_data
hwmon: (f75375s) Add new style bindings
hwmon: (lm70) Convert semaphore to mutex
hwmon: (applesmc) Add support for Mac Pro 2 x Quad-Core
hwmon: (abituguru3) Add support for 2 new motherboards
hwmon: (ibmpex) Change printk to dev_{info,err} macros
hwmon: (i5k_amb) New memory temperature sensor driver
hwmon: (f75375s) fix pwm mode setting
hwmon: (ibmpex.c) fix NULL dereference
hwmon: (sis5595) Split sis5595_attributes_opt
hwmon: (sis5595) Add individual alarm files
hwmon: (w83627hf) push nr+1 offset into *_REG_FAN macros and simplify
hwmon: (w83627hf) hoist nr-1 offset out of show-store-temp-X
hwmon: Add power meter spec to Documentation/hwmon/sysfs-interface
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On thecus n2100, the bootloader does not setup fans to run. In order
to protect the user from frying their gear, start up fans on boot.
Signed-off-by: Riku Voipio <riku.voipio@movial.fi>
Acked-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
[POWERPC] Silence an annoying boot message
[POWERPC] Fix early btext debug on PowerMac
[POWERPC] Demote clockevent printk to KERN_DEBUG
[POWERPC] Fix CONFIG_SMP=n build error on ppc64
[POWERPC] Avoid unpaired stwcx. on some processors
[POWERPC] Fix oops related to 4xx flush_tlb_page modification
[POWERPC] cpm: Fix a couple minor issues in cpm_common.c.
[POWERPC] Add -mno-spe for ARCH=powerpc builds
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vmemmap_populate will printk (with KERN_WARNING) for a lot of pages
if CONFIG_SPARSEMEM_VMEMMAP is enabled (at least it does on iSeries).
Use pr_debug for it instead.
Replace the only other use of DBG in this file with pr_debug as well.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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The early btext debug wouldn't work on PowerMac when booted from BootX
due to the code looking for the wrong property name.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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These don't need to be seen by everyone on every boot.
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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The patch "KVM: fix !SMP build error" change the way smp_call_function()
actually uses the passed in function names on non-SMP builds. So
previously it was never caught that the function passed in was never
actually defined.
This causes a build error on ppc64_defconfig + CONFIG_SMP=n:
arch/powerpc/mm/tlb_64.c: In function 'pgtable_free_now':
arch/powerpc/mm/tlb_64.c:71: error: 'pte_free_smp_sync' undeclared (first use in this function)
arch/powerpc/mm/tlb_64.c:71: error: (Each undeclared identifier is reported only once
arch/powerpc/mm/tlb_64.c:71: error: for each function it appears in.)
So we need to define it even if CONFIG_SMP is off. Either that or ifdef
out the smp_call_function() call, but that's ugly.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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The context switch code in the kernel issues a dummy stwcx. to clear the
reservation, as recommended by the architecture. However, some processors
can have issues if this stwcx to address A occurs while the reservation
is already held to a different address B. To avoid this problem, the dummy
stwcx. needs to be paired with a dummy lwarx to the same address.
This adds the dummy lwarx, and creates a cpu feature bit to indicate
which cpus are affected. Tested on mpc8641_hpcn_defconfig in
arch/powerpc; build tested in arch/ppc.
Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into merge
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A debugging printk is removed, and a comment is fixed to match
the code.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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Newer GCC's are capable of autovectorization for ISA extensions like
AltiVec and SPE. If we happen to build with one of those compilers we
will get SPE instructions in random kernel code. Today we only allow
basic interger code in the kernel and FP, AltiVec, or SPE in special
explicit locations that have handled the proper saving and restoring of
the register state (since on uniprocessor we lazy context switch the
register state for FP, AltiVec, and SPE).
-mno-spe disables the compiler for automatically generating SPE
instructions without our knowledge.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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restore sigcontext is taking a DNA exception while restoring FP context
from the user stack, during the sigreturn. Appended patch fixes it by
doing clts() if the app doesn't touch FP during the signal handler
execution. This will stop generating a DNA, during the fxrstor in the
sigreturn.
This improves 64-bit lat_sig numbers by ~30% on my core2 platform.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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[ jdike - Pushing Chuck's patch - see
http://lkml.org/lkml/2005/9/16/261 for some history and a test
program. UML is also broken without this patch - its processes get
SIGBUS from the corrupt 6th argument to mmap being interpretted as a
file offset ]
When the 32-bit vDSO is used to make a system call, the %ebp register for
the 6th syscall arg has to be loaded from the user stack (where it's pushed
by the vDSO user code). The native i386 kernel always does this before
stopping for syscall tracing, so %ebp can be seen and modified via ptrace
to access the 6th syscall argument. The x86-64 kernel fails to do this,
presenting the stack address to ptrace instead. This makes the %rbp value
seen by 64-bit ptrace of a 32-bit process, and the %ebp value seen by a
32-bit caller of ptrace, both differ from the native i386 behavior.
This patch fixes the problem by putting the word loaded from the user stack
into %rbp before calling syscall_trace_enter, and reloading the 6th syscall
argument from there afterwards (so ptrace can change it). This makes the
behavior match that of i386 kernels.
Original-Patch-By: Roland McGrath <roland@redhat.com>
Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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The addr argument to PTRACE_GET_THREAD_AREA and PTRACE_SET_THREAD_AREA is
not a magic constant. It's derived from the segment register values being
used, which are computed originally from the index used with set_thread_area.
The value does not need to match what a native i386 kernel would accept.
It needs to match the segment selectors that can actually be in use in this
32-bit process. The 64-bit ptrace support for PTRACE_GET_THREAD_AREA
(normally used only on 32-bit processes) is correct, but the 32-bit emulation
of ptrace is broken.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] IOSAPIC bogus error cleanup
[IA64] Update printing of feature set bits
[IA64] Fix IOSAPIC delivery mode setting
[IA64] XPC heartbeat timer function must run on CPU 0
[IA64] Clean up /proc/interrupts output
[IA64] Disable/re-enable CPE interrupts on Altix
[IA64] Clean-up McKinley Errata message
[IA64] Add gate.lds to list of files ignored by Git
[IA64] Fix section mismatch in contig.c version of per_cpu_init()
[IA64] Wrong args to memset in efi_gettimeofday()
[IA64] Remove duplicate includes from ia32priv.h
[IA64] fix number of bytes zeroed by sys_fw_init() in arch/ia64/hp/sim/boot/fw-emu.c
[IA64] Fix perfmon sysctl directory modes
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On Altix (sn2) machines the "Error parsing MADT" message is
misleading because the lack of IOSAPIC entries is expected.
Since I am sure someone will ask, I have been told that
the chance of this changing anytime soon is close to nil.
Signed-off-by: George Beshers <gbeshers@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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Newer Itanium versions have added additional processor feature set
bits. This patch prints all the implemented feature set bits. Some
bit descriptions have not been made public. For those bits, a generic
"Feature set X bit Y" message is printed. Bits that are not implemented
will no longer be printed.
Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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Fix the problem that redirect hit bit in I/O SAPIC RTE is set even
when it must be disabled (e.g. nointroute boot option is set, CPU
hotplug is enabled or percpu vector is enabled).
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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Currently, XPC's heartbeat timer function runs on whatever CPU modprobe/insmod
ran on when XPC was started. To avoid the heartbeat from being delayed for
long periods the timer function must run on CPU 0.
N.B. Altix doesn't currently allow cpu0 to be taken offline, so this is
safe for now. This code must be revised when offline of cpu0 is enabled.
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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Clean up /proc/interrupts output on the system that has 10 or more
CPUs.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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When the CPE handler encounters too many CPEs (such as a solid single
bit memory error), it sets up a polling timer and disables the CPE
interrupt (to avoid excessive overhead logging the stream of single
bit errors). disable_irq_nosync() calls chip->disable() to provide
a chipset specifiec interface for disabling the interrupt. This patch
adds the Altix specific support to disable and re-enable the CPE interrupt.
Signed-off-by: Russ Anderson (rja@sgi.com)
Signed-off-by: Tony Luck <tony.luck@intel.com>
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No need to print "McKinley Errata 9 workaround not needed; disabling it"
on every non-McKinley Itanium, which at this point is almost all of them.
Signed-off-by: Russ Anderson (rja@sgi.com)
Signed-off-by: Tony Luck <tony.luck@intel.com>
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If you build the kernel `in-place' then do a git update, git
complains about arch/ia64/kernel/gate.lds being modified and
untracked.
Add that (generated) file to a .gitignore file.
Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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There is a section mismatch when building CONFIG_FLATMEM=y kernels
that also have CONFIG_HOTPLUG_CPU=y
WARNING: vmlinux.o(.text+0x5a902): Section mismatch: reference to \
.init.text:__alloc_bootmem (between 'per_cpu_init' and 'count_pages')
The issue occurs because per_cpu_init() in mm/contig.c is
marked __cpuinit (which is #define'd to nothing on a hot
plug cpu configuration) call __alloc_bootmem() (which is
an __init function). The usage is actually safe because
the __alloc_bootmem() is inside an "if (first_time)" test
so that the call is only made while it is still legal to
do so.
But the warning is irritating. Move the allocation to
find_memory().
Signed-off-by: Tony Luck <tony.luck@intel.com>
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Not sizeof(ptr) ... we meant to say sizeof(*ptr).
Also moved the memset to the error path (the normal path overwrites
every field in the structure anyway) -Tony
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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Don't need asm/processor.h twice
Signed-off-by: Lucas Woods <woodzy@gmail.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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arch/ia64/hp/sim/boot/fw-emu.c
The sizeof a pointer is constant, we want the sizeof what is pointed to.
Zero out 'sizeof(*efi_systab)' bytes of the efi_system_table_t pointer
'efi_systab' instead.
Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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New sanity checks in sysctl_check_table() complain about a couple
of mode 0755 that should be 0555 in the perfmon code:
sysctl table check failed: /kernel .1 Writable sysctl directory
sysctl table check failed: /kernel/perfmon Writable sysctl directory
Signed-off-by: Tony Luck <tony.luck@intel.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
sched: proper prototype for kernel/sched.c:migration_init()
sched: avoid large irq-latencies in smp-balancing
sched: fix copy_namespace() <-> sched_fork() dependency in do_fork
sched: clean up the wakeup preempt check, #2
sched: clean up the wakeup preempt check
sched: wakeup preemption fix
sched: remove PREEMPT_RESTRICT
sched: turn off PREEMPT_RESTRICT
KVM: fix !SMP build error
x86: make nmi_cpu_busy() always defined
x86: make ipi_handler() always defined
sched: cleanup, use NSEC_PER_MSEC and NSEC_PER_SEC
sched: reintroduce SMP tunings again
sched: restore deterministic CPU accounting on powerpc
sched: fix delay accounting regression
sched: reintroduce the sched_min_granularity tunable
sched: documentation: place_entity() comments
sched: fix vslice
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nmi_cpu_busy() must be available on !SMP too.
this is in preparation to a smp_call_function_mask() fix.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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prepare for up_smp_call_function() to ensure that the 'func'
pointer is unused. (which is related to a KVM build fix)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Since powerpc started using CONFIG_GENERIC_CLOCKEVENTS, the
deterministic CPU accounting (CONFIG_VIRT_CPU_ACCOUNTING) has been
broken on powerpc, because we end up counting user time twice: once in
timer_interrupt() and once in update_process_times().
This fixes the problem by pulling the code in update_process_times
that updates utime and stime into a separate function called
account_process_tick. If CONFIG_VIRT_CPU_ACCOUNTING is not defined,
there is a version of account_process_tick in kernel/timer.c that
simply accounts a whole tick to either utime or stime as before. If
CONFIG_VIRT_CPU_ACCOUNTING is defined, then arch code gets to
implement account_process_tick.
This also lets us simplify the s390 code a bit; it means that the s390
timer interrupt can now call update_process_times even when
CONFIG_VIRT_CPU_ACCOUNTING is turned on, and can just implement a
suitable account_process_tick().
account_process_tick() now takes the task_struct * as an argument.
Tested both with and without CONFIG_VIRT_CPU_ACCOUNTING.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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* master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6: (26 commits)
sh: remove dead config symbols from SH code
sh: Kill off broken snapgear ds1302 code.
sh: Add a dummy vga.h.
rtc: rtc-sh: Zero out tm value for invalid rtc states.
rtc: sh-rtc: Handle rtc_device_register() failure properly.
sh: Fix heartbeart on Solution Engine series
sh: Remove SCI_NPORTS from sh-sci.h
sh: Fix up PAGE_KERNEL_PCC() for nommu.
sh: hs7751rvoip: Kill off dead IPR IRQ mappings.
sh: hs7751rvoip: irq.c needs linux/interrupt.h.
sh: Kill off __{copy,clear}_user_page().
sh: Optimized copy_{to,from}_user_page() for SH-4.
sh: Wire up clear_user_highpage().
sh: Kill off the remaining ST40 cruft.
superhyway: Handle device_register() retval properly.
sh: kgdb sysrq depends on magic sysrq.
sh: Add -Werror for clean directories.
sh: Fix up kgdb build with modular sh-sci.
sh: Export __{s,u}divsi3_i4i on all CPUs.
sh: Fix up kgdb-on-NMI branch target.
...
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Follow the sh change.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Now that copy_to_user_page()/copy_from_user_page() are wired up, we
can drop the old __copy_xxx() implementations. Now that the page
colouring scheme has changed via kmap_coherent(), we can avoid the
flush in these specific helpers.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This moves copy_{to,from}_user_page() out-of-line on SH-4 and
converts for the kmap_coherent() API. Based on the MIPS
implementation.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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With the kmap_coherent() API in place, this is trivial to implement,
and lets us avoid the cache flush in certain cases.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This will force the snapgear boards to use the on-chip SH RTC instead,
until the rtc-ds1302 driver is merged. The current code is broken
and hasn't built in some time, so just kill it off and get the board
working again.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Access size to LED is not added on Solution Engine series.
LED doesn't work. Fixed this problem.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This is dead code, and doesn't build anyways. Kill it off.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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The ST40 stuff in-tree hasn't built for some time, and hasn't been
updated for over 3 years. ST maintains their own out-of-tree changes
and rebases occasionally, and that's ultimately where all of the ST40
users go anyways.
In order for the ST40 code to be brought up to date most of the stuff
removed in this changeset would have to be rewritten anyways, so there's
very little benefit in keeping the remnants around either.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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