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By default, IRQ work is run from the tick interrupt (see
irq_work_run() in update_process_times()). When we're in full
NOHZ mode, restarting the tick requires the use of IRQ work and
if the only place we run IRQ work is in the tick interrupt we
have an unbreakable cycle. Implement arch_irq_work_raise() via
self IPIs to break this cycle and get the tick started again.
Note that we implement this via IPIs which are only available on
SMP builds. This shouldn't be a problem because full NOHZ is only
supported on SMP builds anyway.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB driver update from Greg KH:
"Here's the big USB driver update for 3.13-rc1.
It includes the usual xhci changes, EHCI updates to get the scheduling
of USB transactions working better, and a raft of gadget and musb
updates as well.
All of this has been in linux-next for a while with no reported
issues"
* tag 'usb-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (305 commits)
USB: Maintainers change for usb serial drivers
usb: usbtest: support container id descriptor test
usb: usbtest: support superspeed device capbility descriptor test
usb: usbtest: support usb2 extension descriptor test
usb: chipidea: only get vbus regulator for non-peripheral mode
USB: ehci-atmel: add usb_clk for transition to CCF
usb: cdc-wdm: ignore speed change notifications
USB: cdc-wdm: support back-to-back USB_CDC_NOTIFY_RESPONSE_AVAILABLE notifications
usbatm: Fix dynamic_debug / ratelimited atm_dbg and atm_rldbg macros
printk: pr_debug_ratelimited: check state first to reduce "callbacks suppressed" messages
usb: usbtest: support bos descriptor test for usb 3.0
USB: phy: samsung: Support multiple PHYs of same type
usb: wusbcore: change WA_SEGS_MAX to a legal value
usb: wusbcore: add a quirk for Alereon HWA device isoc behavior
usb: wusbcore: combine multiple isoc frames in a single transfer request.
usb: wusbcore: set the RPIPE wMaxPacketSize value correctly
usb: chipidea: host: more enhancement when ci->hcd is NULL
usb: ohci: remove ep93xx bus glue platform driver
usb: usbtest: fix checkpatch warning as sizeof code style
UWB: clean up attribute use by using ATTRIBUTE_GROUPS()
...
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The ARM architecture reference specifies that the IT state bits in the
PSR must be all zeros in ARM mode or behavior is unspecified. On the
Qualcomm Snapdragon S4/Krait architecture CPUs the processor continues
to consider the IT state bits while in ARM mode. This makes it so
that some instructions are skipped by the CPU.
Signed-off-by: T.J. Purtell <tj@mobisocial.us>
[rmk+kernel@arm.linux.org.uk: fixed whitespace formatting in patch]
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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No-MMU configurations currenty fail to build because they are missing
the early_paging_init() symbol.
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The exception handling code fails to clear the IT state, potentially
leading to incorrect execution of the fixup if the size of the IT
block is more than one.
Let fixup_exception do the IT sanitizing if a fixup has been found,
and restore CPSR from the stack when returning from a data abort.
Cc: Will Deacon <will.deacon@arm.com>
Cc: stable@vger.kernel.org
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Commit 6dedcca610c6 ("hotplug, powerpc, x86: Remove
cpu_hotplug_driver_lock())" removes the the definition of
cpu_hotplug_driver_{lock,unlock} APIs, thereby causing a build error.
Replace these calls with {lock,unlock}_device_hotplug().
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Certain platforms do not allow writes in the MSI-X BARs to setup or tear
down vector values. To combat against the generic code trying to write to
that and either silently being ignored or crashing due to the pagetables
being marked R/O this patch introduces a platform override.
Note that we keep two separate, non-weak, functions default_mask_msi_irqs()
and default_mask_msix_irqs() for the behavior of the arch_mask_msi_irqs()
and arch_mask_msix_irqs(), as the default behavior is needed by x86 PCI
code.
For Xen, which does not allow the guest to write to MSI-X tables - as the
hypervisor is solely responsible for setting the vector values - we
implement two nops.
This fixes a Xen guest crash when passing a PCI device with MSI-X to the
guest. See the bugzilla for more details.
[bhelgaas: add bugzilla info]
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=64581
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com>
CC: Zhenzhong Duan <zhenzhong.duan@oracle.com>
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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: Jayachandran C <jchandra@broadcom.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
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This patch proposes to remove the IRQF_DISABLED flag from x86/xen
code. It's a NOOP since 2.6.35 and it will be removed one day.
Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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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: Oleg Nesterov <oleg@redhat.com>
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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: Rabin Vincent <rabin@rab.in>
Signed-off-by: David A. Long <dave.long@linaro.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
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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.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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This patch removes a duplicate define from
arch/mips/boot/ecoff.h
Signed-off-by: Michael 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: Ralf Baechle <ralf@linux-mips.org>
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Commit 52ea2a560a9d (arm64: locks: introduce ticket-based spinlock
implementation) introduces the arch_spin_is_contended() function making
CONFIG_GENERIC_LOCKBREAK unnecessary.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
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Currently seqlocks and seqcounts don't support lockdep.
After running across a seqcount related deadlock in the timekeeping
code, I used a less-refined and more focused variant of this patch
to narrow down the cause of the issue.
This is a first-pass attempt to properly enable lockdep functionality
on seqlocks and seqcounts.
Since seqcounts are used in the vdso gettimeofday code, I've provided
non-lockdep accessors for those needs.
I've also handled one case where there were nested seqlock writers
and there may be more edge cases.
Comments and feedback would be appreciated!
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/1381186321-4906-3-git-send-email-john.stultz@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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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: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Peter 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.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The encoding for filter registers of IvyBridge-EP uncore QPI boxes is
completely the same as SandyBridge-EP.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Peter 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.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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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: Peter 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.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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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: James Hogan <james.hogan@imgtec.com>
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Ensure that accesses to the GICH_* registers are byteswapped
when the kernel is compiled as big-endian.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Force SCTLR_EL2.EE to 1 if the kernel is compiled as BE.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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The prototype for kvm_check_iopl appeared in commit
f850e2e603bf5a05b0aee7901857cf85715aa694 ("KVM: x86 emulator: Check IOPL
level during io instruction emulation"), but the function never actually
existed. Remove the prototype.
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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complete_pio ceased to exist in commit
7972995b0c346de76fe260ce0fd6bcc8ffab724a ("KVM: x86 emulator: Move
string pio emulation into emulator.c"), but the prototype remained.
Remove its prototype.
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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In certain occasions it is possible for a hung task detector
positive to be false: continuation from a paused VM, for example.
Add a method to reset detection, similar as is done
with other kernel watchdogs.
Acked-by: Don Zickus <dzickus@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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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: Michael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
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Implement reset of kernel watchdogs at pvclock read time. This avoids
adding special code to every watchdog.
This is possible for watchdogs which measure time based on sched_clock() or
ktime_get() variants.
Suggested by Don Zickus.
Acked-by: Don Zickus <dzickus@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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I noticed that srcu_read_lock/unlock both have a memory barrier,
so just by moving srcu_read_unlock earlier we can get rid of
one call to smp_mb() using smp_mb__after_srcu_read_unlock instead.
Unsurprisingly, the gain is small but measureable using the unit test
microbenchmark:
before
vmcall in the ballpark of 1410 cycles
after
vmcall in the ballpark of 1360 cycles
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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The MAXSMP option is intended to enable silly large numbers of
CPUs for testing purposes. The current value of 4096 isn't very
silly any longer as there are actual SGI machines that approach
6096 CPUs when taking HT into account.
Increase the value to a nice round 8192 to account for this and
allow for short term future increases.
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Cc: prarit@redhat.com
Cc: Russ Anderson <rja@sgi.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20131105143816.GK9944@hansolo.jdub.homelinux.org
[ Tweaked it so that MAXSMP simply sets the maximum of the normal range. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The current range for SMP configs is 2 - 512 CPUs, or a full
4096 in the case of MAXSMP. There are machines that have 1024
CPUs in them today and configuring a kernel for that means you
are forced to set MAXSMP. This adds additional unnecessary
overhead. While that overhead might be considered tiny for
large machines, it isn't necessarily so if you are building a
kernel that runs across a wide variety of machines.
To cover the range of more common machines today, we allow
NR_CPUS to be up to 4096 when CPUMASK_OFFSTACK is enabled.
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Cc: prarit@redhat.com
Cc: Russ Anderson <rja@sgi.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20131105143728.GJ9944@hansolo.jdub.homelinux.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Currently show_cpuinfo_core() displays cpu core information only if
the number of threads per a whole cores is 2 or larger.
However, this condition doesn't care about the number of
sockets. For example, this condition doesn't hold on systems
with two logical cpus consisting of two sockets and a single
core on each socket - yet the topology information would be
interesting to see in that case as well.
I don't know whether or not there are processors in real world
by which such configurations are possible, but at least on
vitual machine environments, such configuration can occur,
typically when no explicit SMP information is provided in
advance.
For example, on qemu/KVM, SMP information is specified via -smp
command-line option, more specifically, its syntax is:
-smp n[,cores=cores][,threads=threads][,sockets=sockets][,maxcpus=maxcpus]
If this is not specified, qemu tells configuration with
n-sockets, 1-core and 1-thread to the guest machine, on which
guest, MP information is not displayed in /proc/cpuinfo.
I saw this situation on VMWare guest environment, too.
To fix this issue, this patch simply removes the condition
because this information is useful even if there's only 1
thread.
Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/5277D644.4090707@jp.fujitsu.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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file move
Conflicts:
kernel/Makefile
There are conflicts in kernel/Makefile due to file moving in the
scheduler tree - resolve them.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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more changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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ST.as only takes S9 (255) for offset. This was going out of range when
accessing a task_struct field with 4k NR_CPUS (due to 128b of coumaks
itself in there).
Workaround by using an intermediate register to do the address scaling.
There is some duplication of fix for ctx_sw.c and ctx_sw_asm.S however
given that C version will go away soon I'm not bothering to factor out
the common code.
Reported-by: Noam Camus <noamc@ezchip.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Signed-off-by: Noam Camus <noamc@ezchip.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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- Add mm_cpumask setting (aggregating only, unlike some other arches)
used to restrict the TLB flush cross-calling
- cross-calling versions of TLB flush routines (thanks to Noam)
Signed-off-by: Noam Camus <noamc@ezchip.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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-Track a Per CPU ASID counter
-mm-per-cpu ASID (multiple threads, or mm migrated around)
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Need export symbol for it, or can not pass compiling, the related error
with allmodconfig:
MODPOST 2994 modules
ERROR: "pm_power_off" [drivers/mfd/retu-mfd.ko] undefined!
ERROR: "pm_power_off" [drivers/char/ipmi/ipmi_poweroff.ko] undefined!
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Need export its symbol just like other architectures done, or can not
pass compiling with allmodconfig, the related error:
MODPOST 2994 modules
ERROR: "save_stack_trace" [kernel/backtracetest.ko] undefined!
ERROR: "save_stack_trace" [drivers/md/persistent-data/dm-persistent-data.ko] undefined!
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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get_hw_config_num_irq() may be called by normal iss_model_init_smp()
which is a function pointer for 'init_smp' which may be called by
first_lines_of_secondary() which also need be normal too.
The related warning (with allmodconfig):
MODPOST vmlinux.o
WARNING: vmlinux.o(.text+0x5814): Section mismatch in reference from the function iss_model_init_smp() to the function .init.text:get_hw_config_num_irq()
The function iss_model_init_smp() references
the function __init get_hw_config_num_irq().
This is often because iss_model_init_smp lacks a __init
annotation or the annotation of get_hw_config_num_irq is wrong.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
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first_lines_of_secondary() is a '__init' function, but it may be called
by __cpu_up() by _cpu_up() by cpu_up() which is a normal export symbol
function. So recommend to remove '__init'.
The related warning (with allmodconfig):
MODPOST vmlinux.o
WARNING: vmlinux.o(.text+0x315c): Section mismatch in reference from the function __cpu_up() to the function .init.text:first_lines_of_secondary()
The function __cpu_up() references
the function __init first_lines_of_secondary().
This is often because __cpu_up lacks a __init
annotation or the annotation of first_lines_of_secondary is wrong.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
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They haven't '__init' in definition, but has '__init' in declaration.
And normal function start_kernel_secondary() may call setup_processor()
which will call arc_init_IRQ().
So need remove '__init' for both of them. The related warning (with
allmodconfig):
MODPOST vmlinux.o
WARNING: vmlinux.o(.text+0x3084): Section mismatch in reference from the function start_kernel_secondary() to the function .init.text:setup_processor()
The function start_kernel_secondary() references
the function __init setup_processor().
This is often because start_kernel_secondary lacks a __init
annotation or the annotation of setup_processor is wrong.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
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arc supports kgdb, but need update -- add function kgdb_roundup_cpus(),
or can not pass compiling. At present, add the simple generic one just
like other architectures(e.g. tile, mips ...).
The related error (with allmodconfig):
kernel/built-in.o: In function `kgdb_cpu_enter':
kernel/debug/debug_core.c:580: undefined reference to `kgdb_roundup_cpus'
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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------------------>8----------------------
arch/arc/mm/tlb.c: In function ‘do_tlb_overlap_fault’:
arch/arc/mm/tlb.c:688:13: warning: array subscript is above array bounds
[-Warray-bounds]
(pd0[n] & PAGE_MASK)) {
^
------------------>8----------------------
While at it, remove the usless last iteration of outer loop when reading
a TLB SET for duplicate entries.
Suggested-by: Mischa Jonker <mjonker@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Lockdep required a small fix to stacktrace API which was incorrectly
unwindign out of __switch_to for the current call frame.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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In case bootloader has changed the priority of one/more IRQ lines
Reported-by: Noam Camus <noamc@ezchip.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Emulation not enabled is treated as if the fixup failed, so no need for
special #ifdef checks.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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switch the args (address, pt_regs) to match with all the other "C"
exception handlers.
This removes the awkwardness in EV_ProtV for page fault vs. unaligned
access.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Line op needs vaddr (indexing) and paddr (tag match). For page sized
flushes (V-P const), each line op will need a different index, but the
tag bits wil remain constant, hence paddr can be setup once outside the
loop.
This improves select LMBench numbers for Aliasing dcache where we have
more "preventive" cache flushing.
Processor, Processes - times in microseconds - smaller is better
------------------------------------------------------------------------------
Host OS Mhz null null open slct sig sig fork exec sh
call I/O stat clos TCP inst hndl proc proc proc
--------- ------------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
3.11-rc7- Linux 3.11.0- 80 4.66 8.88 69.7 112. 268. 8.60 28.0 3489 13.K 27.K # Non alias ARC700
3.11-rc7- Linux 3.11.0- 80 4.64 8.51 68.6 98.5 271. 8.58 28.1 4160 15.K 32.K # Aliasing
3.11-rc7- Linux 3.11.0- 80 4.64 8.51 69.8 99.4 270. 8.73 27.5 3880 15.K 31.K # PTAG loop Inv
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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With Line length being constant now, we can fold the 2 helpers into 1.
This allows applying any optimizations (forthcoming) to single place.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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