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* Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds2014-01-3117-38/+55
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull MIPS updates from Ralf Baechle: "The most notable new addition inside this pull request is the support for MIPS's latest and greatest core called "inter/proAptiv". The patch series describes this core as follows. "The interAptiv is a power-efficient multi-core microprocessor for use in system-on-chip (SoC) applications. The interAptiv combines a multi-threading pipeline with a coherence manager to deliver improved computational throughput and power efficiency. The interAptiv can contain one to four MIPS32R3 interAptiv cores, system level coherence manager with L2 cache, optional coherent I/O port, and optional floating point unit." The platform specific patches touch all 3 Broadcom families. It adds support for the new Broadcom/Netlogix XLP9xx Soc, building a common BCM63XX SMP kernel for all BCM63XX SoCs regardless of core type/count and full gpio button/led descriptions for BCM47xx. The rest of the series are cleanups and bug fixes that are MIPS generic and consist largely of changes that Imgtec/MIPS had published in their linux-mti-3.10.git stable tree. Random other cleanups and patches preparing code to be merged in 3.15" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (139 commits) mips: select ARCH_MIGHT_HAVE_PC_SERIO mips: delete non-required instances of include <linux/init.h> MIPS: KVM: remove shadow_tlb code MIPS: KVM: use common EHINV aware UNIQUE_ENTRYHI mips/ide: flush dcache also if icache does not snoop dcache MIPS: BCM47XX: fix position of cpu_wait disabling MIPS: BCM63XX: select correct MIPS_L1_CACHE_SHIFT value MIPS: update MIPS_L1_CACHE_SHIFT based on MIPS_L1_CACHE_SHIFT_<N> MIPS: introduce MIPS_L1_CACHE_SHIFT_<N> MIPS: ZBOOT: gather string functions into string.c arch/mips/pci: don't check resource with devm_ioremap_resource arch/mips/lantiq/xway: don't check resource with devm_ioremap_resource bcma: gpio: don't cast u32 to unsigned long ssb: gpio: add own IRQ domain MIPS: BCM47XX: fix sparse warnings in board.c MIPS: BCM47XX: add board detection for Linksys WRT54GS V1 MIPS: BCM47XX: fix detection for some boards MIPS: BCM47XX: Enable buttons support on SSB MIPS: BCM47XX: Convert WNDR4500 to new syntax MIPS: BCM47XX: Use "timer" trigger for status LEDs ...
| * mips: delete non-required instances of include <linux/init.h>Paul Gortmaker2014-01-2412-12/+0Star
| | | | | | | | | | | | | | | | | | | | | | None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/6320/
| * MIPS: improve checks for noncoherent DMAFelix Fietkau2014-01-221-0/+2
| | | | | | | | | | | | | | | | | | | | | | Only one MIPS development board actually supports enabling/disabling DMA coherency at runtime, so it's not a good idea to push the overhead of checking that configuration setting onto every other supported target as well. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/5912/
| * MIPS: Add support for interAptiv coresLeonid Yegoshin2014-01-222-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The interAptiv is a power-efficient multi-core microprocessor for use in system-on-chip (SoC) applications. The interAptiv combines a multi-threading pipeline with a coherence manager to deliver improved computational throughput and power efficiency. The interAptiv can contain one to four MIPS32R3 interAptiv cores, system level coherence manager with L2 cache, optional coherent I/O port, and optional floating point unit. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/6163/
| * MIPS: Add support for FTLBsLeonid Yegoshin2014-01-221-7/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The Fixed Page Size TLB (FTLB) is a set-associative dual entry TLB. Its purpose is to reduce the number of TLB misses by increasing the effective TLB size and keep the implementation complexity to minimum levels. A supported core can have both VTLB and FTLB. Reviewed-by: James Hogan <james.hogan@imgtec.com> Reviewed-by: Paul Burton <paul.burton@imgtec.com> Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/6139/
| * MIPS: mm: Use the TLBINVF instruction to flush the VTLBLeonid Yegoshin2014-01-221-6/+12
| | | | | | | | | | | | | | | | | | | | | | The TLBINVF instruction can be used to flush the entire VTLB. This eliminates the need for the TLBWI loop and improves performance. Reviewed-by: Paul Burton <paul.burton@imgtec.com> Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/6138/
| * MIPS: Add support for the proAptiv coresLeonid Yegoshin2014-01-223-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The proAptiv Multiprocessing System is a power efficient multi-core microprocessor for use in system-on-chip (SoC) applications. The proAptiv Multiprocessing System combines a deep pipeline with multi-issue out of order execution for improved computational throughput. The proAptiv Multiprocessing System can contain one to six MIPS32r3 proAptiv cores, system level coherence manager with L2 cache, optional coherent I/O port, and optional floating point unit. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/6134/
| * MIPS: mm: Move UNIQUE_ENTRYHI macro to a header fileMarkos Chandras2014-01-222-8/+1Star
| | | | | | | | | | | | | | | | | | | | The UNIQUE_ENTRYHI definition was duplicated whenever there was the need to flush the TLB entries. We move this common definition to a header file. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/6129/
| * MIPS: mm: c-r4k: Panic if IL or DL fields have a reserved valueMarkos Chandras2014-01-221-8/+16
| | | | | | | | | | | | | | | | | | | | | | According to MIPS32 and MIPS64 PRA documents, a value of 7 in IL and DL fields is marked as "Reserved" so panic if the core uses this value in the config1 register. Also simplify the code a little bit. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/5861/
* | MIPS: fix blast_icache32 on loongson2Aaro Koskinen2014-01-151-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 14bd8c082016 ("MIPS: Loongson: Get rid of Loongson 2 #ifdefery all over arch/mips") failed to add Loongson2 specific blast_icache32 functions. Fix that. The patch fixes the following crash seen with 3.13-rc1: Reserved instruction in kernel code[#1]: [...] Call Trace: blast_icache32_page+0x8/0xb0 r4k_flush_cache_page+0x19c/0x200 do_wp_page.isra.97+0x47c/0xe08 handle_mm_fault+0x938/0x1118 __do_page_fault+0x140/0x540 resume_userspace_check+0x0/0x10 Code: 00200825 64834000 00200825 <bc900000> bc900020 bc900040 bc900060 bc900080 bc9000a0 Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Acked-by: John Crispin <blogic@openwrt.org> 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>
* | MIPS: fix case mismatch in local_r4k_flush_icache_range()Huacai Chen2014-01-151-2/+2
|/ | | | | | | | | | | | | | | | | | | | Currently, Loongson-2 call protected_blast_icache_range() and others call protected_loongson23_blast_icache_range(), but I think the correct behavior should be the opposite. BTW, Loongson-3's cache-ops is compatible with MIPS64, but not compatible with Loongson-2. So, rename xxx_loongson23_yyy things to xxx_loongson2_yyy. The patch fixes early boot hang with 3.13-rc1, introduced in commit 14bd8c082016 ("MIPS: Loongson: Get rid of Loongson 2 #ifdefery all over arch/mips"). Signed-off-by: Huacai Chen <chenhc@lemote.com> Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Acked-by: John Crispin <blogic@openwrt.org> 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>
* Merge branch 'sched-core-for-linus' of ↵Linus Torvalds2013-11-121-3/+2Star
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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() ...
| * Merge tag 'v3.12-rc4' into sched/coreIngo Molnar2013-10-097-27/+48
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge Linux v3.12-rc4 to fix a conflict and also to refresh the tree before applying more scheduler patches. Conflicts: arch/avr32/include/asm/Kbuild Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * | sched: Extract the basic add/sub preempt_count modifiersPeter Zijlstra2013-09-251-3/+2Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rewrite the preempt_count macros in order to extract the 3 basic preempt_count value modifiers: __preempt_count_add() __preempt_count_sub() and the new: __preempt_count_dec_and_test() And since we're at it anyway, replace the unconventional $op_preempt_count names with the more conventional preempt_count_$op. Since these basic operators are equivalent to the previous _notrace() variants, do away with the _notrace() versions. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/n/tip-ewbpdbupy9xpsjhg960zwbv8@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | | MIPS: Loongson: Get rid of Loongson 2 #ifdefery all over arch/mips.Ralf Baechle2013-10-293-119/+139
| | | | | | | | | | | | | | | | | | It was ugly. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | MIPS: mm: Use scratch for PGD when !CONFIG_MIPS_PGD_C0_CONTEXTJayachandran C2013-10-292-35/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allow usage of scratch register for current pgd even when MIPS_PGD_C0_CONTEXT is not configured. MIPS_PGD_C0_CONTEXT is set for 64r2 platforms to indicate availability of Xcontext for saving cpuid, thus freeing Context to be used for saving PGD. This option was also tied to using a scratch register for storing PGD. This commit will allow usage of scratch register to store the current pgd if one can be allocated for the platform, even when MIPS_PGD_C0_CONTEXT is not set. The cpuid will be kept in the CP0 Context register in this case. The code to store the current pgd for the TLB miss handler is now generated in all cases. When scratch register is available, the PGD is also stored in the scratch register. Signed-off-by: Jayachandran C <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Cc: Hauke Mehrtens <hauke@hauke-m.de> Patchwork: https://patchwork.linux-mips.org/patch/5906/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | MIPS: Remove unnecessary platform dma helper functionsFelix Fietkau2013-10-291-3/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The semantics stay the same - on Cavium Octeon the functions were dead code (it overrides the MIPS DMA ops) - on other platforms they contained no code at all. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5720/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | MIPS: Move definition of SMP processor id register to header fileJayachandran C2013-10-291-50/+6Star
| |/ |/| | | | | | | | | | | | | | | | | The definition of the CP0 register used to save the smp processor id is repicated in many files, move them all to thread_info.h. Signed-off-by: Jayachandran C <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5708/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Fix forgotten preempt_enable() when CPU has inclusive pcachesYoichi Yuasa2013-10-021-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ 1.904000] BUG: scheduling while atomic: swapper/1/0x00000002 [ 1.908000] Modules linked in: [ 1.916000] CPU: 0 PID: 1 Comm: swapper Not tainted 3.12.0-rc2-lemote-los.git-5318619-dirty #1 [ 1.920000] Stack : 0000000031aac000 ffffffff810d0000 0000000000000052 ffffffff802730a4 0000000000000000 0000000000000001 ffffffff810cdf90 ffffffff810d0000 ffffffff8068b968 ffffffff806f5537 ffffffff810cdf90 980000009f0782e8 0000000000000001 ffffffff80720000 ffffffff806b0000 980000009f078000 980000009f290000 ffffffff805f312c 980000009f05b5d8 ffffffff80233518 980000009f05b5e8 ffffffff80274b7c 980000009f078000 ffffffff8068b968 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 980000009f05b520 0000000000000000 ffffffff805f2f6c 0000000000000000 ffffffff80700000 ffffffff80700000 ffffffff806fc758 ffffffff80700000 ffffffff8020be98 ffffffff806fceb0 ffffffff805f2f6c ... [ 2.028000] Call Trace: [ 2.032000] [<ffffffff8020be98>] show_stack+0x80/0x98 [ 2.036000] [<ffffffff805f2f6c>] __schedule_bug+0x44/0x6c [ 2.040000] [<ffffffff805fac58>] __schedule+0x518/0x5b0 [ 2.044000] [<ffffffff805f8a58>] schedule_timeout+0x128/0x1f0 [ 2.048000] [<ffffffff80240314>] msleep+0x3c/0x60 [ 2.052000] [<ffffffff80495400>] do_probe+0x238/0x3a8 [ 2.056000] [<ffffffff804958b0>] ide_probe_port+0x340/0x7e8 [ 2.060000] [<ffffffff80496028>] ide_host_register+0x2d0/0x7a8 [ 2.064000] [<ffffffff8049c65c>] ide_pci_init_two+0x4e4/0x790 [ 2.068000] [<ffffffff8049f9b8>] amd74xx_probe+0x148/0x2c8 [ 2.072000] [<ffffffff803f571c>] pci_device_probe+0xc4/0x130 [ 2.076000] [<ffffffff80478f60>] driver_probe_device+0x98/0x270 [ 2.080000] [<ffffffff80479298>] __driver_attach+0xe0/0xe8 [ 2.084000] [<ffffffff80476ab0>] bus_for_each_dev+0x78/0xe0 [ 2.088000] [<ffffffff80478468>] bus_add_driver+0x230/0x310 [ 2.092000] [<ffffffff80479b44>] driver_register+0x84/0x158 [ 2.096000] [<ffffffff80200504>] do_one_initcall+0x104/0x160 Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org> Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi> Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: linux-mips@linux-mips.org Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org> Patchwork: https://patchwork.linux-mips.org/patch/5941/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: mm: Move some checks out of 'for' loop in DMA operationsJayachandran C2013-09-251-8/+4Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The check cpu_needs_post_dma_flush() in mips_dma_sync_sg_for_cpu() and the check !plat_device_is_coherent() in mips_dma_sync_sg_for_device() can be moved outside the for loop. As a side effect, this also avoids a GCC bug that caused kernel compile to fail with the error: arch/mips/mm/dma-default.c: In function 'mips_dma_sync_sg_for_cpu': arch/mips/mm/dma-default.c:316:1: internal compiler error: in add_insn_before, at emit-rtl.c:3852 This gcc failure is seen in Code Sourcery toolchains [e.g. gcc version 4.7.2 (Sourcery CodeBench Lite 2012.09-99)] after commit "MIPS: Optimize current_cpu_type() for better code." Signed-off-by: Jayachandran C <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5907/ Reviewed-by: Markos Chandras <markos.chandras@imgtec.com> Tested-by: Markos Chandras <markos.chandras@imgtec.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: 74K/1074K: Correct erratum workaround.Maciej W. Rozycki2013-09-181-8/+18
| | | | | | | | | | | | | | | | | | | | | | | | Make sure 74K revision numbers are not applied to the 1074K. Also catch invalid usage. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5857/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Cleanup CP0 PRId and CP1 FPIR register access masksMaciej W. Rozycki2013-09-181-5/+6
| | | | | | | | | | | | | | | | | | | | Replace hardcoded CP0 PRId and CP1 FPIR register access masks throughout. The change does not touch places that use shifted or partial masks. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5838/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Optimize current_cpu_type() for better code.Ralf Baechle2013-09-177-10/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | o Move current_cpu_type() to a separate header file o #ifdefing on supported CPU types lets modern GCC know that certain code in callers may be discarded ideally turning current_cpu_type() into a function returning a constant. o Use current_cpu_type() rather than direct access to struct cpuinfo_mips. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5833/
* | MIPS: Fix accessing to per-cpu data when flushing the cacheRalf Baechle2013-09-171-0/+5
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes the following issue BUG: using smp_processor_id() in preemptible [00000000] code: kjournald/1761 caller is blast_dcache32+0x30/0x254 Call Trace: [<8047f02c>] dump_stack+0x8/0x34 [<802e7e40>] debug_smp_processor_id+0xe0/0xf0 [<80114d94>] blast_dcache32+0x30/0x254 [<80118484>] r4k_dma_cache_wback_inv+0x200/0x288 [<80110ff0>] mips_dma_map_sg+0x108/0x180 [<80355098>] ide_dma_prepare+0xf0/0x1b8 [<8034eaa4>] do_rw_taskfile+0x1e8/0x33c [<8035951c>] ide_do_rw_disk+0x298/0x3e4 [<8034a3c4>] do_ide_request+0x2e0/0x704 [<802bb0dc>] __blk_run_queue+0x44/0x64 [<802be000>] queue_unplugged.isra.36+0x1c/0x54 [<802beb94>] blk_flush_plug_list+0x18c/0x24c [<802bec6c>] blk_finish_plug+0x18/0x48 [<8026554c>] journal_commit_transaction+0x3b8/0x151c [<80269648>] kjournald+0xec/0x238 [<8014ac00>] kthread+0xb8/0xc0 [<8010268c>] ret_from_kernel_thread+0x14/0x1c Caches in most systems are identical - but not always, so we can't avoid the use of smp_call_function() by just looking at the boot CPU's data, have to fiddle with preemption instead. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5835
* Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds2013-09-136-8/+32
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull MIPS updates from Ralf Baechle: "This has been sitting in -next for a while with no objections and all MIPS defconfigs except one are building fine; that one platform got broken by another patch in your tree and I'm going to submit a patch separately. - a handful of fixes that didn't make 3.11 - a few bits of Octeon 3 support with more to come for a later release - platform enhancements for Octeon, ath79, Lantiq, Netlogic and Ralink SOCs - a GPIO driver for the Octeon - some dusting off of the DECstation code - the usual dose of cleanups" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (65 commits) MIPS: DMA: Fix BUG due to smp_processor_id() in preemptible code MIPS: kexec: Fix random crashes while loading crashkernel MIPS: kdump: Skip walking indirection page for crashkernels MIPS: DECstation HRT calibration bug fixes MIPS: Export copy_from_user_page() (needed by lustre) MIPS: Add driver for the built-in PCI controller of the RT3883 SoC MIPS: DMA: For BMIPS5000 cores flush region just like non-coherent R10000 MIPS: ralink: Add support for reset-controller API MIPS: ralink: mt7620: Add cpu-feature-override header MIPS: ralink: mt7620: Add spi clock definition MIPS: ralink: mt7620: Add wdt clock definition MIPS: ralink: mt7620: Improve clock frequency detection MIPS: ralink: mt7620: This SoC has EHCI and OHCI hosts MIPS: ralink: mt7620: Add verbose ram info MIPS: ralink: Probe clocksources from OF MIPS: ralink: Add support for systick timer found on newer ralink SoC MIPS: ralink: Add support for periodic timer irq MIPS: Netlogic: Built-in DTB for XLP2xx SoC boards MIPS: Netlogic: Add support for USB on XLP2xx MIPS: Netlogic: XLP2xx update for I2C controller ...
| * Merge branch '3.11-fixes' into mips-for-linux-nextRalf Baechle2013-09-061-3/+3
| |\
| | * MIPS: DMA: Fix BUG due to smp_processor_id() in preemptible codeJerin Jacob2013-09-061-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The use of current_cpu_type() in cpu_is_noncoherent_r10000() is not preemption-safe. Use boot_cpu_type() instead to make it preemption-safe. <log> / # insmod mtd_readtest.ko dev=4 mtd_readtest: MTD device: 4 mtd_readtest: MTD device size 996671488, eraseblock size 524288, page size 4096, count of eraseblocks 1901, pages per eraseblock 128, OOB size 224 mtd_readtest: scanning for bad eraseblocks mtd_readtest: scanned 1901 eraseblocks, 0 are bad mtd_readtest: testing page read BUG: using smp_processor_id() in preemptible [00000000] code: insmod/99 caller is mips_dma_sync_single_for_cpu+0x2c/0x128 CPU: 2 PID: 99 Comm: insmod Not tainted 3.10.4 #67 Stack : 00000006 69735f63 00000000 00000000 00000000 00000000 808273d6 00000032 80820000 00000002 8d700000 8de48fa0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 8d6afb00 8d6afb24 80721f24 807b9927 8012c130 80820000 80721f24 00000002 00000063 8de48fa0 8082333c 807b98e6 8d6afaa0 ... Call Trace: [<80109984>] show_stack+0x64/0x7c [<80666230>] dump_stack+0x20/0x2c [<803a2210>] debug_smp_processor_id+0xe0/0xf0 [<801116f0>] mips_dma_sync_single_for_cpu+0x2c/0x128 [<8043456c>] nand_plat_read_page+0x16c/0x234 [<8042fad4>] nand_do_read_ops+0x194/0x480 [<804301dc>] nand_read+0x50/0x7c [<804261c8>] part_read+0x70/0xc0 [<804231dc>] mtd_read+0x80/0xe4 [<c0431354>] init_module+0x354/0x6f8 [mtd_readtest] [<8010057c>] do_one_initcall+0x140/0x1a4 [<80176d7c>] load_module+0x1b5c/0x2258 [<8017752c>] SyS_init_module+0xb4/0xec [<8010f3fc>] stack_done+0x20/0x44 BUG: using smp_processor_id() in preemptible [00000000] code: insmod/99 </log> Signed-off-by: Jerin Jacob <jerinjacobk@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5800/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | Merge branch '3.11-fixes' into mips-for-linux-nextRalf Baechle2013-09-051-0/+1
| |\|
| | * MIPS: Export copy_from_user_page() (needed by lustre)Geert Uytterhoeven2013-09-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ERROR: "copy_from_user_page" [drivers/staging/lustre/lustre/libcfs/libcfs.ko] undefined! Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/5808/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | Merge branch '3.11-fixes' into mips-for-linux-nextRalf Baechle2013-09-041-1/+2
| |\|
| | * MIPS: Fix get_user_page_fast() for mips with cache aliasKamal Dasu2013-08-261-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | get_user_pages_fast() is missing cache flushes for MIPS platforms with cache aliases. Filesystem failures observed with DirectIO operations due to missing flush_anon_page() that use page coloring logic to work with cache aliases. This fix falls through to take slow_irqon path that calls get_user_pages() that has required logic for platforms where cpu_has_dc_aliases is true. [ralf@linux-mips.org: Explicity include <asm/cpu-features.h>.] Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/5469/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: DMA: For BMIPS5000 cores flush region just like non-coherent R10000Jim Quinlan2013-09-041-6/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The BMIPS5000 (Zephyr) processor utilizes instruction speculation. A stale misprediction address in either the JTB or the CRS may trigger a prefetch inside a region that is currently being used by a DMA engine, which is not IO-coherent. This prefetch will fetch a line into the scache, and that line will soon become stale (ie wrong) during/after the DMA. Mayhem ensues. In dma-default.c, the r10000 is handled as a special case in the same way that we want to handle Zephyr. So we generalize the exception cases into a function, and include Zephyr as one of the processors that needs this special care. Signed-off-by: Jim Quinlan <jim2101024@gmail.com> Cc: linux-mips@linux-mips.org Cc: cernekee@gmail.com Patchwork: https://patchwork.linux-mips.org/patch/5776/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: OCTEON: Set L1 cache parameters for OCTEON3 CPUs.David Daney2013-08-261-0/+14
| | | | | | | | | | | | | | | | | | | | | Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5638/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: Generate OCTEON3 TLB handlers with the same features as OCTEON2.David Daney2013-08-261-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | OCTEON2 need the same code. Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5637/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: tlbex: Guard tlbmiss_handler_setup_pgdTony Wu2013-08-261-0/+2
| |/ | | | | | | | | | | | | | | | | | | | | tlbmiss_handler_setup_pgd* are only referenced when CONFIG_MIPS_PGD_C0_CONTEXT is defined. Signed-off-by: Tony Wu <tung7970@gmail.com> Cc: Jayachandran C. <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5601/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | arch: mm: pass userspace fault flag to generic fault handlerJohannes Weiner2013-09-131-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Unlike global OOM handling, memory cgroup code will invoke the OOM killer in any OOM situation because it has no way of telling faults occuring in kernel context - which could be handled more gracefully - from user-triggered faults. Pass a flag that identifies faults originating in user space from the architecture-specific fault handlers to generic code so that memcg OOM handling can be improved. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Michal Hocko <mhocko@suse.cz> Cc: David Rientjes <rientjes@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: azurIt <azurit@pobox.sk> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | arch: mm: do not invoke OOM killer on kernel fault OOMJohannes Weiner2013-09-131-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Kernel faults are expected to handle OOM conditions gracefully (gup, uaccess etc.), so they should never invoke the OOM killer. Reserve this for faults triggered in user context when it is the only option. Most architectures already do this, fix up the remaining few. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Michal Hocko <mhocko@suse.cz> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: azurIt <azurit@pobox.sk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | mm: migrate: check movability of hugepage in unmap_and_move_huge_page()Naoya Horiguchi2013-09-121-0/+5
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently hugepage migration works well only for pmd-based hugepages (mainly due to lack of testing,) so we had better not enable migration of other levels of hugepages until we are ready for it. Some users of hugepage migration (mbind, move_pages, and migrate_pages) do page table walk and check pud/pmd_huge() there, so they are safe. But the other users (softoffline and memory hotremove) don't do this, so without this patch they can try to migrate unexpected types of hugepages. To prevent this, we introduce hugepage_migration_support() as an architecture dependent check of whether hugepage are implemented on a pmd basis or not. And on some architecture multiple sizes of hugepages are available, so hugepage_migration_support() also checks hugepage size. Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Hillf Danton <dhillf@gmail.com> Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Hugh Dickins <hughd@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Rik van Riel <riel@redhat.com> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds2013-07-201-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull MIPS fixes from Ralf Baechle: "MIPS fixes for 3.11. Half of then is for Netlogic the remainder touches things across arch/mips. Nothing really dramatic and by rc1 standards MIPS will be in fairly good shape with this applied. Tested by building all MIPS defconfigs of which with this pull request four platforms won't build. And yes, it boots also on my favorite test systems" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: kvm: Kconfig: Drop HAVE_KVM dependency from VIRTUALIZATION MIPS: Octeon: Fix DT pruning bug with pip ports MIPS: KVM: Mark KVM_GUEST (T&E KVM) as BROKEN_ON_SMP MIPS: tlbex: fix broken build in v3.11-rc1 MIPS: Netlogic: Add XLP PIC irqdomain MIPS: Netlogic: Fix USB block's coherent DMA mask MIPS: tlbex: Fix typo in r3000 tlb store handler MIPS: BMIPS: Fix thinko to release slave TP from reset MIPS: Delete dead invocation of exception_exit().
| * MIPS: tlbex: fix broken build in v3.11-rc1Aaro Koskinen2013-07-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Commit 6ba045f9fbdafb48da42aa8576ea7a3980443136 (MIPS: Move generated code to .text for microMIPS) deleted tlbmiss_handler_setup_pgd_array, but some references were not converted. Fix that to enable building a MIPS kernel. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Acked-by: Jayachandran C. <jchandra@broadcom.com> Acked-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5589/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * MIPS: tlbex: Fix typo in r3000 tlb store handlerTony Wu2013-07-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | commit 6ba045f (MIPS: Move generated code to .text for microMIPS) causes a panic at boot. The handler builder should test against handle_tlbs_end, not handle_tlbs. Signed-off-by: Tony Wu <tung7970@gmail.com> Acked-by: Jayachandran C. <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5600/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Delete __cpuinit/__CPUINIT usage from MIPS codePaul Gortmaker2013-07-1518-207/+187Star
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 3747069b25e419f6b51395f48127e9812abc3596 upstream. The __cpuinit type of throwaway sections might have made sense some time ago when RAM was more constrained, but now the savings do not offset the cost and complications. For example, the fix in commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time") is a good example of the nasty type of bugs that can be created with improper use of the various __init prefixes. After a discussion on LKML[1] it was decided that cpuinit should go the way of devinit and be phased out. Once all the users are gone, we can then finally remove the macros themselves from linux/init.h. Note that some harmless section mismatch warnings may result, since notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c) and are flagged as __cpuinit -- so if we remove the __cpuinit from the arch specific callers, we will also get section mismatch warnings. As an intermediate step, we intend to turn the linux/init.h cpuinit related content into no-ops as early as possible, since that will get rid of these warnings. In any case, they are temporary and harmless. Here, we remove all the MIPS __cpuinit from C code and __CPUINIT from asm files. MIPS is interesting in this respect, because there are also uasm users hiding behind their own renamed versions of the __cpuinit macros. [1] https://lkml.org/lkml/2013/5/20/589 [ralf@linux-mips.org: Folded in Paul's followup fix.] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5494/ Patchwork: https://patchwork.linux-mips.org/patch/5495/ Patchwork: https://patchwork.linux-mips.org/patch/5509/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds2013-07-137-78/+168
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull MIPS updates from Ralf Baechle: "MIPS updates: - All the things that didn't make 3.10. - Removes the Windriver PPMC platform. Nobody will miss it. - Remove a workaround from kernel/irq/irqdomain.c which was there exclusivly for MIPS. Patch by Grant Likely. - More small improvments for the SEAD 3 platform - Improvments on the BMIPS / SMP support for the BCM63xx series. - Various cleanups of dead leftovers. - Platform support for the Cavium Octeon-based EdgeRouter Lite. Two large KVM patchsets didn't make it for this pull request because their respective authors are vacationing" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (124 commits) MIPS: Kconfig: Add missing MODULES dependency to VPE_LOADER MIPS: BCM63xx: CLK: Add dummy clk_{set,round}_rate() functions MIPS: SEAD3: Disable L2 cache on SEAD-3. MIPS: BCM63xx: Enable second core SMP on BCM6328 if available MIPS: BCM63xx: Add SMP support to prom.c MIPS: define write{b,w,l,q}_relaxed MIPS: Expose missing pci_io{map,unmap} declarations MIPS: Malta: Update GCMP detection. Revert "MIPS: make CAC_ADDR and UNCAC_ADDR account for PHYS_OFFSET" MIPS: APSP: Remove <asm/kspd.h> SSB: Kconfig: Amend SSB_EMBEDDED dependencies MIPS: microMIPS: Fix improper definition of ISA exception bit. MIPS: Don't try to decode microMIPS branch instructions where they cannot exist. MIPS: Declare emulate_load_store_microMIPS as a static function. MIPS: Fix typos and cleanup comment MIPS: Cleanup indentation and whitespace MIPS: BMIPS: support booting from physical CPU other than 0 MIPS: Only set cpu_has_mmips if SYS_SUPPORTS_MICROMIPS MIPS: GIC: Fix gic_set_affinity infinite loop MIPS: Don't save/restore OCTEON wide multiplier state on syscalls. ...
| * Merge branch '3.10-fixes' into mips-for-linux-nextRalf Baechle2013-07-122-18/+42
| |\ | | | | | | | | | | | | This that should have been fixed but weren't, way to much, intrusive and late.
| | * MIPS: tlbex: Fix size of area to be flushed.Ralf Baechle2013-06-271-1/+1
| | | | | | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * MIPS: Flush TLB handlers directly after writing themJonas Gorski2013-06-251-14/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When having enabled MIPS_PGD_C0_CONTEXT, trap_init() might call the generated tlbmiss_handler_setup_pgd before it was committed to memory, causing boot failures: trap_init() |- per_cpu_trap_init() | |- TLBMISS_HANDLER_SETUP() | |- tlbmiss_handler_setup_pgd() |- flush_tlb_handlers() To avoid this, move flush_tlb_handlers() into build_tlb_refill_handler() right after they were generated. We can do this as the cache handling is initialized just before creating the tlb handlers. This issue was introduced in 3d8bfdd0307223de678962f1c1907a7cec549136 ("MIPS: Use C0_KScratch (if present) to hold PGD pointer."). Signed-off-by: Jonas Gorski <jogo@openwrt.org> Cc: linux-mips@linux-mips.org Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Jayachandran C <jchandra@broadcom.com> Cc: David Daney <david.daney@cavium.com> Patchwork: https://patchwork.linux-mips.org/patch/5539/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * MIPS: Fix TLBR-use hazards for R2 cores in the TLB reload handlersRalf Baechle2013-06-211-0/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | MIPS R2 documents state that an execution hazard barrier is needed after a TLBR before reading EntryLo. Original patch by Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Patchwork: https://patchwork.linux-mips.org/patch/5526/
| | * MIPS: Sibyte: Fix build for SIBYTE_BW_TRACE on BCM1x55 and BCM1x80.Ralf Baechle2013-06-211-4/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CC arch/mips/mm/cerr-sb1.o arch/mips/mm/cerr-sb1.c: In function ‘sb1_cache_error’: arch/mips/mm/cerr-sb1.c:186:98: error: ‘M_BCM1480_SCD_TRACE_CFG_FREEZE’ undeclared (first use in this function) arch/mips/mm/cerr-sb1.c:186:98: note: each undeclared identifier is reported only once for each function it appears in make[1]: *** [arch/mips/mm/cerr-sb1.o] Error 1 This happens because 8deab1144b553548fb2f1b51affdd36dcd652aaa [[MIPS] Updated Sibyte headers] changed the headers but not all the users. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Reported-by: Markos Chandras <markos.chandras@imgtec.com> Patchwork: https://patchwork.linux-mips.org/patch/5511/
| * | MIPS: Fix typos and cleanup commentTony Wu2013-07-011-1/+1
| | | | | | | | | | | | | | | | | | | | | Signed-off-by: Tony Wu <tung7970@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5535/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | MIPS: Cleanup indentation and whitespaceTony Wu2013-07-011-1/+1
| | | | | | | | | | | | | | | | | | | | | Signed-off-by: Tony Wu <tung7970@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5536/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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