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2014-01-13arch: Re-sort some Kbuild files to hopefully help avoid some conflictsStephen Rothwell
Checkin: 93ea02bb8435 arch: Clean up asm/barrier.h implementations using asm-generic/barrier.h ... unfortunately left some Kbuild files out of order, which caused unnecessary merge conflicts, in particular with checkin: e3fec2f74f7f lib: Add missing arch generic-y entries for asm-generic/hash.h Put them back in order to make the upcoming merges cleaner. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Link: http://lkml.kernel.org/r/20140114164420.d296fbcc4be3a5f126c86069@canb.auug.org.au Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Peter Zijlstra <peterz@infradead.org> Cc: David Miller <davem@davemloft.net>
2014-01-13net: resort some Kbuild files to hopefully help avoid some conflictsStephen Rothwell
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-01-13Merge tag 'v3.13-rc8' into core/lockingIngo Molnar
Refresh the tree with the latest fixes, before applying new changes. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-01-12arch: Clean up asm/barrier.h implementations using asm-generic/barrier.hPeter Zijlstra
We're going to be adding a few new barrier primitives, and in order to avoid endless duplication make more agressive use of asm-generic/barrier.h. Change the asm-generic/barrier.h such that it allows partial barrier definitions and fills out the rest with defaults. There are a few architectures (m32r, m68k) that could probably do away with their barrier.h file entirely but are kept for now due to their unconventional nop() implementation. Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Michael Ellerman <michael@ellerman.id.au> Cc: Michael Neuling <mikey@neuling.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Victor Kaplansky <VICTORK@il.ibm.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/20131213150640.846368594@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-01-12arch: Move smp_mb__{before,after}_atomic_{inc,dec}.h into asm/atomic.hPeter Zijlstra
Move the barriers functions that depend on the atomic implementation into the atomic implementation. Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Vineet Gupta <vgupta@synopsys.com> [for arch/arc bits] Cc: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/20131213150640.786183683@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-01-06Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Conflicts: drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c net/ipv6/ip6_tunnel.c net/ipv6/ip6_vti.c ipv6 tunnel statistic bug fixes conflicting with consolidation into generic sw per-cpu net stats. qlogic conflict between queue counting bug fix and the addition of multiple MAC address support. Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-23ARC: [SMP] optimize IPI send and receiveVineet Gupta
* Don't send an IPI if receiver already has a pending IPI. Atomically piggyback the new msg with pending msg. * IPI receiver looping on xchg() not required References: https://lkml.org/lkml/2013/11/25/232 Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-12-23ARC: [SMP] simplify IPI codeVineet Gupta
* ipi_data is just a word, no need to keep it as struct * find_next_bit() not needed to loop thru a 32bit word, ffs suffices
2013-12-23ARC: [SMP] cpu halt interface doesn't need "self" cpu-idVineet Gupta
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-12-23ARC: [SMP] IPI ACK interface doesn't need "self" cpu-idVineet Gupta
The interface is confusing, it feels like we are getting "sender" info, whereas it is the "receiver", which can very well be retrived by smp_processor_id(), if need be. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-12-23ARC: [SMP] cpumask not needed in IPI send pathVineet Gupta
The current IPI sending callstack needlessly involves cpumask. arch_send_call_function_single_ipi(cpu) / smp_send_reschedule(cpu) ipi_send_msg(cpumask_of(cpu)) --> [cpu to cpumask] plat_smp_ops.ipi_send(callmap) for_each_cpu(callmap) --> [cpuask to cpu] do_plat_specific_ipi_PER_CPU Given that current backends are not capable of 1:N IPIs, lets simplify the interface for now, by keeping "a" cpu all along. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-12-19ARC: Allow conditional multiple inclusion of uapi/asm/unistd.hVineet Gupta
Commit 97bc386fc12d "ARC: Add guard macro to uapi/asm/unistd.h" inhibited multiple inclusion of ARCH unistd.h. This however hosed the system since Generic syscall table generator relies on it being included twice, and in lack-of an empty table was emitted by C preprocessor. Fix that by allowing one exception to rule for the special case (just like Xtensa) Suggested-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-12-18Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Conflicts: drivers/net/ethernet/intel/i40e/i40e_main.c drivers/net/macvtap.c Both minor merge hassles, simple overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2013-12-17lib: Add missing arch generic-y entries for asm-generic/hash.hDavid S. Miller
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-11-28ARC: [perf] Fix a few thinkosVineet Gupta
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-25ARC: Add guard macro to uapi/asm/unistd.hVineet Gupta
Chen originally proposed this as "right thing to do" however I actually ran into this when building perf tools. Some of the utils include unistd.h as well as linux/unistd.h. Since -I includes kernel headers too, we end up including the ARC unistd.h twice, leading to redefinition nwarnings. ------------------>8------------------- CC bench/sched-pipe.o In file included from ~/kernel/arch/arc/include/uapi/asm/unistd.h:21:0, from ~/kernel/include/uapi/linux/unistd.h:7, from bench/sched-pipe.c:24: ~/kernel/include/uapi/asm-generic/unistd.h:889:0: error: "__NR_fcntl64" redefined [-Werror] #define __NR_fcntl64 __NR3264_fcntl ^ In file included from ~/gnu/arc-linux-uclibc/sys-include/sys/syscall.h:24:0, from bench/../perf.h:112, from bench/sched-pipe.c:13: ~/gnu/arc-linux-uclibc/include/bits/sysnum.h:761:0: note: this is the location of the previous definition ------------------>8------------------- Verified that make headers_install works fine with this. Suggested-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: David Howells <dhowells@redhat.com>
2013-11-25ARC: extable: Enable sorting at build timeVineet Gupta
Avoids wasting cycles at boot specially on slower simulators Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Michal Marek <mmarek@suse.cz> Cc: Francois Bedard <fbedard@synopsys.com> Cc: linux-kernel@vger.kernel.org Acked-by: David Daney <david.daney@cavium.com>
2013-11-19Merge tag 'arc-v3.13-rc1-part2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull second set of ARC changes from Vineet Gupta: - Support for Perf from Mischa - Enabling GPIO/Pinctrl drivers for Abilis TB10x platform - New defconfig for buildroot * tag 'arc-v3.13-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: [plat-arcfpga] Add defconfig without initramfs location ARC: perf: ARC 700 PMU doesn't support sampling events ARC: Add documentation on DT binding for ARC700 PMU ARC: Add perf support for ARC700 cores ARC: [TB10x] Updates for GPIO and pinctrl
2013-11-19Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq cleanups from Ingo Molnar: "This is a multi-arch cleanup series from Thomas Gleixner, which we kept to near the end of the merge window, to not interfere with architecture updates. This series (motivated by the -rt kernel) unifies more aspects of IRQ handling and generalizes PREEMPT_ACTIVE" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: preempt: Make PREEMPT_ACTIVE generic sparc: Use preempt_schedule_irq ia64: Use preempt_schedule_irq m32r: Use preempt_schedule_irq hardirq: Make hardirq bits generic m68k: Simplify low level interrupt handling code genirq: Prevent spurious detection for unconditionally polled interrupts
2013-11-15Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial Pull trivial tree updates from Jiri Kosina: "Usual earth-shaking, news-breaking, rocket science pile from trivial.git" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (23 commits) doc: usb: Fix typo in Documentation/usb/gadget_configs.txt doc: add missing files to timers/00-INDEX timekeeping: Fix some trivial typos in comments mm: Fix some trivial typos in comments irq: Fix some trivial typos in comments NUMA: fix typos in Kconfig help text mm: update 00-INDEX doc: Documentation/DMA-attributes.txt fix typo DRM: comment: `halve' -> `half' Docs: Kconfig: `devlopers' -> `developers' doc: typo on word accounting in kprobes.c in mutliple architectures treewide: fix "usefull" typo treewide: fix "distingush" typo mm/Kconfig: Grammar s/an/a/ kexec: Typo s/the/then/ Documentation/kvm: Update cpuid documentation for steal time and pv eoi treewide: Fix common typo in "identify" __page_to_pfn: Fix typo in comment Correct some typos for word frequency clk: fixed-factor: Fix a trivial typo ...
2013-11-15ARC: [plat-arcfpga] Add defconfig without initramfs locationMischa Jonker
This is useful if you want to build a kernel without a ramfs, or if you want to test the kernel build without having an initramfs available at the hardcoded location. Cc: Vineet Gupta <vgupta@synopsys.com> Signed-off-by: Mischa Jonker <mjonker@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-15ARC: perf: ARC 700 PMU doesn't support sampling eventsMischa Jonker
The ARC 700 does not have an interrupt associated with it, and as such it cannot trigger when a counter overflows. As the counters are 48 bit, it will usually take at least 100 days before a counter overflows, so for mere counting of events, there is no problem. Sampling is not supported though. Signed-off-by: Mischa Jonker <mjonker@synopsys.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-15kernel: remove CONFIG_USE_GENERIC_SMP_HELPERSChristoph Hellwig
We've switched over every architecture that supports SMP to it, so remove the new useless config variable. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Jan Kara <jack@suse.cz> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-11-15arc: handle pgtable_page_ctor() failKirill A. Shutemov
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> [for arch/arc bits] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-11-13preempt: Make PREEMPT_ACTIVE genericThomas Gleixner
No point in having this bit defined by architecture. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20130917183629.090698799@linutronix.de
2013-11-12Merge tag 'devicetree-for-3.13' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull devicetree updates from Rob Herring: "DeviceTree updates for 3.13. This is a bit larger pull request than usual for this cycle with lots of clean-up. - Cross arch clean-up and consolidation of early DT scanning code. - Clean-up and removal of arch prom.h headers. Makes arch specific prom.h optional on all but Sparc. - Addition of interrupts-extended property for devices connected to multiple interrupt controllers. - Refactoring of DT interrupt parsing code in preparation for deferred probe of interrupts. - ARM cpu and cpu topology bindings documentation. - Various DT vendor binding documentation updates" * tag 'devicetree-for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (82 commits) powerpc: add missing explicit OF includes for ppc dt/irq: add empty of_irq_count for !OF_IRQ dt: disable self-tests for !OF_IRQ of: irq: Fix interrupt-map entry matching MIPS: Netlogic: replace early_init_devtree() call of: Add Panasonic Corporation vendor prefix of: Add Chunghwa Picture Tubes Ltd. vendor prefix of: Add AU Optronics Corporation vendor prefix of/irq: Fix potential buffer overflow of/irq: Fix bug in interrupt parsing refactor. of: set dma_mask to point to coherent_dma_mask of: add vendor prefix for PHYTEC Messtechnik GmbH DT: sort vendor-prefixes.txt of: Add vendor prefix for Cadence of: Add empty for_each_available_child_of_node() macro definition arm/versatile: Fix versatile irq specifications. of/irq: create interrupts-extended property microblaze/pci: Drop PowerPC-ism from irq parsing of/irq: Create of_irq_parse_and_map_pci() to consolidate arch code. of/irq: Use irq_of_parse_and_map() ...
2013-11-12ARC: Add perf support for ARC700 coresMischa Jonker
This adds basic perf support for ARC700 cores. Most PERF_COUNT_HW* events are supported now. Signed-off-by: Mischa Jonker <mjonker@synopsys.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-12Merge branch 'sched-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler changes from Ingo Molnar: "The main changes in this cycle are: - (much) improved CONFIG_NUMA_BALANCING support from Mel Gorman, Rik van Riel, Peter Zijlstra et al. Yay! - optimize preemption counter handling: merge the NEED_RESCHED flag into the preempt_count variable, by Peter Zijlstra. - wait.h fixes and code reorganization from Peter Zijlstra - cfs_bandwidth fixes from Ben Segall - SMP load-balancer cleanups from Peter Zijstra - idle balancer improvements from Jason Low - other fixes and cleanups" * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (129 commits) ftrace, sched: Add TRACE_FLAG_PREEMPT_RESCHED stop_machine: Fix race between stop_two_cpus() and stop_cpus() sched: Remove unnecessary iteration over sched domains to update nr_busy_cpus sched: Fix asymmetric scheduling for POWER7 sched: Move completion code from core.c to completion.c sched: Move wait code from core.c to wait.c sched: Move wait.c into kernel/sched/ sched/wait: Fix __wait_event_interruptible_lock_irq_timeout() sched: Avoid throttle_cfs_rq() racing with period_timer stopping sched: Guarantee new group-entities always have weight sched: Fix hrtimer_cancel()/rq->lock deadlock sched: Fix cfs_bandwidth misuse of hrtimer_expires_remaining sched: Fix race on toggling cfs_bandwidth_used sched: Remove extra put_online_cpus() inside sched_setaffinity() sched/rt: Fix task_tick_rt() comment sched/wait: Fix build breakage sched/wait: Introduce prepare_to_wait_event() sched/wait: Add ___wait_cond_timeout() to wait_event*_timeout() too sched: Remove get_online_cpus() usage sched: Fix race in migrate_swap_stop() ...
2013-11-11ARC: [TB10x] Updates for GPIO and pinctrlChristian Ruppert
Device tree and Kconfig updates for GPIO and pinctrl drivers. Signed-off-by: Christian Ruppert <christian.ruppert@abilis.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-07Merge remote-tracking branch 'grant/devicetree/next' into for-nextRob Herring
2013-11-07ARC: [plat-arcfpga] defconfig updateVineet Gupta
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-07smp, ARC: kill SMP single function call interruptJiang Liu
Commit 9a46ad6d6df3b54 "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: Jiang Liu <jiang.liu@huawei.com> Cc: Jiang Liu <liuj97@gmail.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-07ARC: [SMP] Disallow RTSCVineet Gupta
RTSC is strictly incore and must not be allowed in SMP configs Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-06ARC: [SMP] Fix build failures for large NR_CPUSVineet Gupta
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>
2013-11-06ARC: [SMP] enlarge possible NR_CPUSNoam Camus
Signed-off-by: Noam Camus <noamc@ezchip.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-06ARC: [SMP] TLB flushVineet Gupta
- 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>
2013-11-06ARC: [SMP] ASID allocationVineet Gupta
-Track a Per CPU ASID counter -mm-per-cpu ASID (multiple threads, or mm migrated around) Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2013-11-06arc: export symbol for pm_power_off in reset.cChen Gang
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>
2013-11-06arc: export symbol for save_stack_trace() in stacktrace.cChen Gang
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>
2013-11-06arc: remove '__init' for get_hw_config_num_irq()Chen Gang
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>
2013-11-06arc: remove '__init' for first_lines_of_secondary()Chen Gang
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>
2013-11-06arc: remove '__init' for setup_processor() and arc_init_IRQ()Chen Gang
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>
2013-11-06arc: kgdb: add default implementation for kgdb_roundup_cpus()Chen Gang
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>
2013-11-06ARC: Fix bogus gcc warning and micro-optimise TLB iteration loopVineet Gupta
------------------>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>
2013-11-06ARC: Add support for irqflags tracing and lockdepVineet Gupta
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>
2013-11-06ARC: Reset the value of Interrupt Priority RegisterVineet Gupta
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>
2013-11-06ARC: Reduce #ifdef'ery for unaligned access emulationVineet Gupta
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>
2013-11-06ARC: Change calling convention of do_page_fault()Vineet Gupta
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>
2013-11-06ARC: cacheflush optim - PTAG can be loop invariant if V-P is constVineet Gupta
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>
2013-11-06ARC: cacheflush refactor #3: Unify the {d,i}cache flush leaf helpersVineet Gupta
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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