In case of error, the function get_cpu_device() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NTony Lindgren <tony@atomide.com>

In case of error, the function platform_device_register_resndata()
returns ERR_PTR() and never returns NULL. The NULL test in the return
value check should be replaced with IS_ERR().
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: NIgor Grinberg <grinberg@compulab.co.il>
Signed-off-by: NTony Lindgren <tony@atomide.com>

This reverts commit 8eba1842.

uv_trace() is not used by anything, nor is uv_trace_nmi_func, nor
uv_trace_func.

That's not how we do instrumentation code in the kernel: we add
tracepoints, printk()s, etc. so that everyone not just those with
magic kernel modules can debug a system.

So remove this unused (and misguied) piece of code.
Signed-off-by: NIngo Molnar <mingo@kernel.org>
Cc: Mike Travis <travis@sgi.com>
Cc: Dimitri Sivanich <sivanich@sgi.com>
Cc: Hedi Berriche <hedi@sgi.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Jason Wessel <jason.wessel@windriver.com>
Link: http://lkml.kernel.org/n/tip-tumfBffmr4jmnt8Gyxanoblg@git.kernel.org

Commit b5b4bb3f (of: only include prom.h on sparc) removed implicit
includes of of_*.h headers by powerpc's prom.h. Some components were
missed in initial clean-up patch, so add the necessary includes to fix
powerpc builds.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-ide@vger.kernel.org
Cc: linux-crypto@vger.kernel.org

Trivial.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

Fix mmap2 behaviour which incorrectly works with pgoff
not in 4k units.
Reported-by: NRich Felker <dalias@aerifal.cx>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

Use standard syscall definition.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

Removed IRQF_DISABLED as it's no-op and should be removed.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

If "nid == MAX_NUMNODES" then we write beyond the end of the node_data[]
array.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NJames Hogan <james.hogan@imgtec.com>

New defconfigs which should be able to boot on any 32/64bit machine.
Many drivers are selected to be compiled-in to avoid the need for an
additional initrd and still being able to boot.
Signed-off-by: NHelge Deller <deller@gmx.de>

Clean up code to send correct signal on invalid memory accesses:
Send SIGBUS instead of SIGSEGV for memory accesses outside of mmap'ed
areas

This fixes the mmap13 testcase from the Linux Test Project.
Signed-off-by: NHelge Deller <deller@gmx.de>

Up to now PA-RISC could live with a trivial version of access_ok().
Our fault handlers can correctly handle fault cases.

But testcases showed that we need a better access check else we won't
always return correct errno failure codes to userspace.

Problem showed up during 32bit userspace tests in which writev() used a
32bit memory area and length which would then wrap around on 64bit
kernel.
Signed-off-by: NHelge Deller <deller@gmx.de>

In case we fail to power up other CPUs in a SMP system, the kernel
currently shows a wrong number of online CPUs. This change makes the
output more verbose on how many of the CPUs are online. Example:

CPU(s): 1 out of 2 PA8800 (Mako) at 900.000000 MHz online.
Signed-off-by: NHelge Deller <deller@gmx.de>

The number of IPI calls is already visible as per-cpu IPI irq counters
in/proc/cpuinfo, so let's drop this additional counting.

This partly reverts:
cd85d551 parisc: more irq statistics in /proc/interrupts
Signed-off-by: NHelge Deller <deller@gmx.de>

Each CPU has it's own Control Register 16 (CR16) which is used as time source
for the udelay() function. But since the CR16 registers across different CPUs
are not synced, we need to recalculate the loop count if we get switched away
to ensure that we really delay as much time as requested.
Signed-off-by: NHelge Deller <deller@gmx.de>

This patch removes a duplicate define from
arch/parisc/math-emu/float.h
Signed-off-by: NMichael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: NHelge Deller <deller@gmx.de>

Install targets (install, zinstall, uinstall) on parisc have a
dependency to vmlinux. This may cause parts of the kernel to be rebuilt
during installation. We must avoid this since this may run as root.
Install targets "ABSOLUTELY MUST NOT MODIFY THE SOURCE TREE." as Linus
emphasized this in:

http://lkml.org/lkml/2013/7/10/600

So on parisc and maybe other archs we need the same as for x86:

1648e4f8 x86, kbuild: make "make install" not depend on vmlinux

This parisc patch was inspired by:

19514fc6 arm, kbuild: make "make install" not depend on vmlinux
Signed-off-by: NHelge Deller <deller@gmx.de>

Implement missing functions for parisc to provide kernel audit feature.
Signed-off-by: NHelge Deller <deller@gmx.de>

Provide a macro ASM_EXCEPTIONTABLE_ENTRY() to create exception table
entries and convert all open-coded places to use that macro.

This patch is a first step toward creating a exception table which only
holds 32bit pointers even on a 64bit kernel. That way in my own kernel
I was able to reduce the in-kernel exception table from 44kB to 22kB.
Signed-off-by: NHelge Deller <deller@gmx.de>

The commit 712b6aa8 [Nov7 linux-next
via tip/auto-latest] ("intel_mid: Renamed *mrst* to *intel_mid*")
adds a __cpuinit.

We removed this a couple versions ago; we now want to remove
the compat no-op stubs.  Introducing new users is not what
we want to see at this point in time, as it will break once
the stubs are gone.

Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Cc: David Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
Link: http://lkml.kernel.org/r/1383849290-11250-1-git-send-email-paul.gortmaker@windriver.comSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>

The non-IPI interrupts are displayed only for the online cpus from
show_interrupts in kernel/irq/proc.c before calling arch_show_interrupts().
As a result, the column headers and the IPI count don't match if any
CPU is offline.

This patch fixes show_ipi_list to display IPIs for online CPUs only.
Signed-off-by: NSudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

This patch converts irq-bcm2835 driver to use the new IRQCHIP_DECLARE and
irqchip_init.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Tested-by: NStephen Warren <swarren@wwwdotorg.org>
Cc: Simon Arlott <simon@fire.lp0.eu>
Cc: Olof Johansson <olof@lixom.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-rpi-kernel@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

In reboot and crash path, when we shut down the local APIC, the I/O APIC is
still active. This may cause issues because external interrupts
can still come in and disturb the local APIC during shutdown process.

To quiet external interrupts, disable I/O APIC before shutdown local APIC.
Signed-off-by: NFenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1382578212-4677-1-git-send-email-fenghua.yu@intel.com
Cc: <stable@kernel.org>
[ I suppose the 'issue' is a hang during shutdown. It's a fine change nevertheless. ]
Signed-off-by: NIngo Molnar <mingo@kernel.org>

Signed-off-by: NVineet Gupta <vgupta@synopsys.com>

Commit 9a46ad6d "smp: make smp_call_function_many() use logic
similar to smp_call_function_single()" has unified the way to handle
single and multiple cross-CPU function calls. Now only one interrupt
is needed for architecture specific code to support generic SMP function
call interfaces, so kill the redundant single function call interrupt.
Signed-off-by: NJiang Liu <jiang.liu@huawei.com>
Cc: Jiang Liu <liuj97@gmail.com>
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>

RTSC is strictly incore and must not be allowed in SMP configs
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>

The kernel needs to setup the first two tlbs with pad
which is used for early page allocation which is used
by mapin_ram() to allocate tables for lowmem memory
before memory initialisation is done.
Calculate pad directly from lowmem size.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

The early_init_devtree() API was removed in linux-next for 3.13 with
commit "mips: use early_init_dt_scan". This causes Netlogic XLP compile
to fail:

arch/mips/netlogic/xlp/setup.c:101: undefined reference to `early_init_devtree'

Add xlp_early_init_devtree() which uses the __dt_setup_arch() to
handle early device tree related initialization to fix this.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Signed-off-by: NRob Herring <rob.herring@calxeda.com>

Currently xol_get_insn_slot() assumes that we should simply copy
arch_uprobe->insn[] which is (ignoring arch_uprobe_analyze_insn)
just the copy of the original insn.

This is not true for arm which needs to create another insn to
execute it out-of-line.

So this patch simply adds the new member, ->ixol into the union.
This doesn't make any difference for x86 and powerpc, but arm
can divorce insn/ixol and initialize the correct xol insn in
arch_uprobe_analyze_insn().
Signed-off-by: NOleg Nesterov <oleg@redhat.com>

Move the function declarations from the arch headers to the common
header, since only the function bodies are architecture-specific.
These changes are from Vincent Rabin's uprobes patch.

[ oleg: update arch/powerpc/include/asm/uprobes.h ]
Signed-off-by: NRabin Vincent <rabin@rab.in>
Signed-off-by: NDavid A. Long <dave.long@linaro.org>
Signed-off-by: NOleg Nesterov <oleg@redhat.com>

The variable hv_lapic_frequency causes an unused variable warning if
CONFIG_X86_LOCAL_APIC is disabled.  Since the variable is only used
inside a small if statement, move the declaration of that variable
into the if statement itself.

Cc: K. Y. Srinivasan <kys@microsoft.com>
Link: http://lkml.kernel.org/r/1381444224-3303-1-git-send-email-kys@microsoft.comSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>

This patch removes a duplicate define from
arch/mips/boot/ecoff.h
Signed-off-by: NMichael Opdenacker <michael.opdenacker@free-electrons.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/6081/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Commit 52ea2a56 (arm64: locks: introduce ticket-based spinlock
implementation) introduces the arch_spin_is_contended() function making
CONFIG_GENERIC_LOCKBREAK unnecessary.
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
Acked-by: NWill Deacon <will.deacon@arm.com>

Unlike other uncore boxes, IRP boxes live in PCI buses with no UBOX
device. For PCI bus without UBOX device, we find the next bus that
has UBOX device and use its 'bus to socket' mapping.

Besides the counter/control registers in IRP boxes are not properly
aligned.
Signed-off-by: NYan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: NPeter Zijlstra <peterz@infradead.org>
Cc: eranian@google.com
Cc: "Yan Zheng" <zheng.z.yan@intel.com>
Link: http://lkml.kernel.org/r/1383197815-17706-2-git-send-email-zheng.z.yan@intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

The encoding for filter registers of IvyBridge-EP uncore QPI boxes is
completely the same as SandyBridge-EP.
Signed-off-by: NYan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: NPeter Zijlstra <peterz@infradead.org>
Cc: eranian@google.com
Cc: "Yan Zheng" <zheng.z.yan@intel.com>
Link: http://lkml.kernel.org/r/1383197815-17706-1-git-send-email-zheng.z.yan@intel.comSigned-off-by: NIngo Molnar <mingo@kernel.org>

The arch_perf_output_copy_user() default of
__copy_from_user_inatomic() returns bytes not copied, while all other
argument functions given DEFINE_OUTPUT_COPY() return bytes copied.

Since copy_from_user_nmi() is the odd duck out by returning bytes
copied where all other *copy_{to,from}* functions return bytes not
copied, change it over and ammend DEFINE_OUTPUT_COPY() to expect bytes
not copied.

Oddly enough DEFINE_OUTPUT_COPY() already returned bytes not copied
while expecting its worker functions to return bytes copied.
Signed-off-by: NPeter Zijlstra <peterz@infradead.org>
Acked-by: will.deacon@arm.com
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20131030201622.GR16117@laptop.programming.kicks-ass.netSigned-off-by: NIngo Molnar <mingo@kernel.org>

Kick interrupts trigger the LWK (low level kick) signal, usually handled
by the __TBIDoStdLWK() function which is the only handler inherited from
the bootloader. The LWK signal is converted either to a SWK (plain
software kick) or a SWS (software kick with an attached message).

Linux has kick_handler() to handle SWK and call registered kick handlers
(IPIs and inter-thread comms), but SWS is as far as I'm aware unused
with Linux.

Therefore remove that abstraction and have Linux handle LWK directly.
This will reduce kick latency slightly, and reduce our dependence on the
bootloader, which makes it easier to directly boot a kernel in QEMU
(particularly for SMP).
Signed-off-by: NJames Hogan <james.hogan@imgtec.com>

Ensure that accesses to the GICH_* registers are byteswapped
when the kernel is compiled as big-endian.
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

Force SCTLR_EL2.EE to 1 if the kernel is compiled as BE.
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

This removes the NO_MMU Kconfig parameter,
which was no longer used anywhere in the source code
and Makefiles.

This also updates a comment refering to this parameter.
Signed-off-by: NMichael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>