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* x86: move apic variables to apic.cBrian Gerst2009-01-271-20/+2
| | | | | | | | | | Impact: Code movement Move the variable definitions to apic.c. Ifdef the copying of the two early per-cpu variables, since Voyager doesn't use them. Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
* x86: always page-align per-cpu area start and sizeBrian Gerst2009-01-271-11/+5
| | | | | | | | | | Impact: cleanup The way the code is written, align is always PAGE_SIZE. Simplify the code by removing the align variable. Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
* x86: move setup_cpu_local_masks()Brian Gerst2009-01-271-19/+0
| | | | | | | | | | Impact: Code movement, no functional change. Move setup_cpu_local_masks() to kernel/cpu/common.c, where the masks are defined. Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
* x86: move 64-bit NUMA codeBrian Gerst2009-01-271-232/+5
| | | | | | | | | Impact: Code movement, no functional change. Move the 64-bit NUMA code from setup_percpu.c to numa_64.c Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
* x86: merge setup_per_cpu_maps() into setup_per_cpu_areas()Brian Gerst2009-01-271-29/+19
| | | | | | | | | Impact: minor optimization Eliminates the need for two loops over possible cpus. Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
* x86: move stack_canary into irq_stackBrian Gerst2009-01-201-30/+4
| | | | | | | | | | | | | | | | Impact: x86_64 percpu area layout change, irq_stack now at the beginning Now that the PDA is empty except for the stack canary, it can be removed. The irqstack is moved to the start of the per-cpu section. If the stack protector is enabled, the canary overlaps the bottom 48 bytes of the irqstack. tj: * updated subject * dropped asm relocation of irq_stack_ptr * updated comments a bit * rebased on top of stack canary changes Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
* x86-64: Move nodenumber from PDA to per-cpu.Brian Gerst2009-01-191-1/+3
| | | | | | | | tj: * s/nodenumber/node_number/ * removed now unused pda variable from pda_init() Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
* x86-64: Move cpu number from PDA to per-cpu and consolidate with 32-bit.Brian Gerst2009-01-191-0/+10
| | | | | | | | tj: moved cpu_number definition out of CONFIG_HAVE_SETUP_PER_CPU_AREA for voyager. Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
* x86-64: Convert irqstacks to per-cpuBrian Gerst2009-01-191-1/+3
| | | | | | | | | | | | | | | | | | | | Move the irqstackptr variable from the PDA to per-cpu. Make the stacks themselves per-cpu, removing some specific allocation code. Add a seperate flag (is_boot_cpu) to simplify the per-cpu boot adjustments. tj: * sprinkle some underbars around. * irq_stack_ptr is not used till traps_init(), no reason to initialize it early. On SMP, just leaving it NULL till proper initialization in setup_per_cpu_areas() works. Dropped is_boot_cpu and early irq_stack_ptr initialization. * do DECLARE/DEFINE_PER_CPU(char[IRQ_STACK_SIZE], irq_stack) instead of (char, irq_stack[IRQ_STACK_SIZE]). Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
* x86: fix build bug introduced during mergeTejun Heo2009-01-161-2/+1
| | | | | | | EXPORT_PER_CPU_SYMBOL() got misplaced during merge leading to build failure. Fix it. Signed-off-by: Tejun Heo <tj@kernel.org>
* x86: make pda a percpu variableTejun Heo2009-01-161-2/+14
| | | | | | | | | | | | [ Based on original patch from Christoph Lameter and Mike Travis. ] As pda is now allocated in percpu area, it can easily be made a proper percpu variable. Make it so by defining per cpu symbol from linker script and declaring it in C code for SMP and simply defining it for UP. This change cleans up code and brings SMP and UP closer a bit. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: merge 64 and 32 SMP percpu handlingTejun Heo2009-01-161-7/+8
| | | | | | | | | | | | | | | | | | | Now that pda is allocated as part of percpu, percpu doesn't need to be accessed through pda. Unify x86_64 SMP percpu access with x86_32 SMP one. Other than the segment register, operand size and the base of percpu symbols, they behave identical now. This patch replaces now unnecessary pda->data_offset with a dummy field which is necessary to keep stack_canary at its place. This patch also moves per_cpu_offset initialization out of init_gdt() into setup_per_cpu_areas(). Note that this change also necessitates explicit per_cpu_offset initializations in voyager_smp.c. With this change, x86_OP_percpu()'s are as efficient on x86_64 as on x86_32 and also x86_64 can use assembly PER_CPU macros. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: fold pda into percpu area on SMPTejun Heo2009-01-161-61/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Based on original patch from Christoph Lameter and Mike Travis. ] Currently pdas and percpu areas are allocated separately. %gs points to local pda and percpu area can be reached using pda->data_offset. This patch folds pda into percpu area. Due to strange gcc requirement, pda needs to be at the beginning of the percpu area so that pda->stack_canary is at %gs:40. To achieve this, a new percpu output section macro - PERCPU_VADDR_PREALLOC() - is added and used to reserve pda sized chunk at the start of the percpu area. After this change, for boot cpu, %gs first points to pda in the data.init area and later during setup_per_cpu_areas() gets updated to point to the actual pda. This means that setup_per_cpu_areas() need to reload %gs for CPU0 while clearing pda area for other cpus as cpu0 already has modified it when control reaches setup_per_cpu_areas(). This patch also removes now unnecessary get_local_pda() and its call sites. A lot of this patch is taken from Mike Travis' "x86_64: Fold pda into per cpu area" patch. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: use static _cpu_pda arrayTejun Heo2009-01-161-11/+3
| | | | | | | | | | | _cpu_pda array first uses statically allocated storage in data.init and then switches to allocated bootmem to conserve space. However, after folding pda area into percpu area, _cpu_pda array will be removed completely. Drop the reallocation part to simplify the code for soon-to-follow changes. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: make percpu symbols zerobased on SMPTejun Heo2009-01-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | [ Based on original patch from Christoph Lameter and Mike Travis. ] This patch makes percpu symbols zerobased on x86_64 SMP by adding PERCPU_VADDR() to vmlinux.lds.h which helps setting explicit vaddr on the percpu output section and using it in vmlinux_64.lds.S. A new PHDR is added as existing ones cannot contain sections near address zero. PERCPU_VADDR() also adds a new symbol __per_cpu_load which always points to the vaddr of the loaded percpu data.init region. The following adjustments have been made to accomodate the address change. * code to locate percpu gdt_page in head_64.S is updated to add the load address to the gdt_page offset. * __per_cpu_load is used in places where access to the init data area is necessary. * pda->data_offset is initialized soon after C code is entered as zero value doesn't work anymore. This patch is mostly taken from Mike Travis' "x86_64: Base percpu variables at zero" patch. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: cleanup early setup_percpu referencesMike Travis2009-01-161-16/+40
| | | | | | | | | | | | | [ Based on original patch from Christoph Lameter and Mike Travis. ] * Ruggedize some calls in setup_percpu.c to prevent mishaps in early calls, particularly for non-critical functions. * Cleanup DEBUG_PER_CPU_MAPS usages and some comments. Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: smp.h move cpu_callin_mask and cpu_callin_map declartion to cpumask.hJaswinder Singh Rajput2009-01-101-0/+1
| | | | | | | Impact: cleanup Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2009-01-101-6/+5
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (36 commits) x86: fix section mismatch warnings in mcheck/mce_amd_64.c x86: offer frame pointers in all build modes x86: remove duplicated #include's x86: k8 numa register active regions later x86: update Alan Cox's email addresses x86: rename all fields of mpc_table mpc_X to X x86: rename all fields of mpc_oemtable oem_X to X x86: rename all fields of mpc_bus mpc_X to X x86: rename all fields of mpc_cpu mpc_X to X x86: rename all fields of mpc_intsrc mpc_X to X x86: rename all fields of mpc_lintsrc mpc_X to X x86: rename all fields of mpc_iopic mpc_X to X x86: irqinit_64.c init_ISA_irqs should be static Documentation/x86/boot.txt: payload length was changed to payload_length x86: setup_percpu.c fix style problems x86: irqinit_64.c fix style problems x86: irqinit_32.c fix style problems x86: i8259.c fix style problems x86: irq_32.c fix style problems x86: ioport.c fix style problems ...
| *-. Merge branches 'x86/cleanups', 'x86/mpparse', 'x86/numa' and 'x86/uv' into ↵Ingo Molnar2009-01-061-27/+17
| |\ \ | | | | | | | | | | | | x86/urgent
| | * | x86: setup_percpu.c fix style problemsJaswinder Singh Rajput2009-01-041-6/+5
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup Fix: WARNING: Use #include <linux/smp.h> instead of <asm/smp.h> WARNING: Use #include <linux/percpu.h> instead of <asm/percpu.h> WARNING: Use #include <linux/topology.h> instead of <asm/topology.h> WARNING: EXPORT_SYMBOL(foo); should immediately follow its function/variable ERROR: spaces required around that '?' (ctx:VxW) ERROR: spaces required around that ':' (ctx:VxV) total: 2 errors, 4 warnings Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | x86: cleanup remaining cpumask_t ops in smpboot codeMike Travis2009-01-041-1/+24
| |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: use new cpumask API to reduce memory and stack usage Allocate the following local cpumasks based on the number of cpus that are present. References will use new cpumask API. (Currently only modified for x86_64, x86_32 continues to use the *_map variants.) cpu_callin_mask cpu_callout_mask cpu_initialized_mask cpu_sibling_setup_mask Provide the following accessor functions: struct cpumask *cpu_sibling_mask(int cpu) struct cpumask *cpu_core_mask(int cpu) Other changes are when setting or clearing the cpu online, possible or present maps, use the accessor functions. Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | x86: setup_per_cpu_areas() cleanupCyrill Gorcunov2009-01-031-17/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup __alloc_bootmem and __alloc_bootmem_node do panic for us in case of fail so no need for additional checks here. Also lets use pr_*() macros for printing. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'master' of ↵Mike Travis2009-01-031-4/+4
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask Conflicts: arch/x86/kernel/io_apic.c kernel/rcuclassic.c kernel/sched.c kernel/time/tick-sched.c Signed-off-by: Mike Travis <travis@sgi.com> [ mingo@elte.hu: backmerged typo fix for io_apic.c ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * cpumask: x86: Introduce cpumask_of_{node,pcibus} to replace ↵Rusty Russell2008-12-261-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | {node,pcibus}_to_cpumask Impact: New APIs The old node_to_cpumask/node_to_pcibus returned a cpumask_t: these return a pointer to a struct cpumask. Part of removing cpumasks from the stack. Also makes __pcibus_to_node take a const pointer. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Ingo Molnar <mingo@elte.hu>
* | x86: move and enhance debug printk for nr_cpu_ids etc.Mike Travis2008-12-161-6/+11
|/ | | | | | | | | | Impact: cleanup, better debugging This has proven useful in debugging, *before* we try to use for_each_possible_cpu(). It also now shows nr_cpumask_bits. Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* cpumask: change cpumask_scnprintf, cpumask_parse_user, cpulist_parse, and ↵Rusty Russell2008-12-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | cpulist_scnprintf to take pointers. Impact: change calling convention of existing cpumask APIs Most cpumask functions started with cpus_: these have been replaced by cpumask_ ones which take struct cpumask pointers as expected. These four functions don't have good replacement names; fortunately they're rarely used, so we just change them over. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: paulus@samba.org Cc: mingo@redhat.com Cc: tony.luck@intel.com Cc: ralf@linux-mips.org Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: cl@linux-foundation.org Cc: srostedt@redhat.com
* x86: remove redundant KERN_DEBUG on pr_debugGustavo F. Padovan2008-10-221-1/+1
| | | | | | | pr_debug don't need KERN_DEBUG. Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* genirq: revert dynarrayThomas Gleixner2008-10-161-6/+2
| | | | | | Revert the dynarray changes. They need more thought and polishing. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: alloc dyn_array all togetherYinghai Lu2008-10-161-5/+11
| | | | | | | | | so could spare some memory with small alignment in bootmem also tighten the alignment checking, and make print out less debug info. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* add per_cpu_dyn_array supportYinghai Lu2008-10-161-2/+5
| | | | | | | | | | | | | | | | | | | | | | | allow dyn-array in per_cpu area, allocated dynamically. usage: | /* in .h */ | struct kernel_stat { | struct cpu_usage_stat cpustat; | unsigned int *irqs; | }; | | /* in .c */ | DEFINE_PER_CPU(struct kernel_stat, kstat); | | DEFINE_PER_CPU_DYN_ARRAY_ADDR(per_cpu__kstat_irqs, per_cpu__kstat.irqs, sizeof(unsigned int), nr_irqs, sizeof(unsigned long), NULL); after setup_percpu()/per_cpu_alloc_dyn_array(), the dyn_array in per_cpu area is ready to use. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge commit 'v2.6.27-rc7' into x86/debugIngo Molnar2008-09-221-21/+0
|\
| * cpu masks: optimize and clean up cpumask_of_cpu()Linus Torvalds2008-07-281-23/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up and optimize cpumask_of_cpu(), by sharing all the zero words. Instead of stupidly generating all possible i=0...NR_CPUS 2^i patterns creating a huge array of constant bitmasks, realize that the zero words can be shared. In other words, on a 64-bit architecture, we only ever need 64 of these arrays - with a different bit set in one single world (with enough zero words around it so that we can create any bitmask by just offsetting in that big array). And then we just put enough zeroes around it that we can point every single cpumask to be one of those things. So when we have 4k CPU's, instead of having 4k arrays (of 4k bits each, with one bit set in each array - 2MB memory total), we have exactly 64 arrays instead, each 8k bits in size (64kB total). And then we just point cpumask(n) to the right position (which we can calculate dynamically). Once we have the right arrays, getting "cpumask(n)" ends up being: static inline const cpumask_t *get_cpu_mask(unsigned int cpu) { const unsigned long *p = cpu_bit_bitmap[1 + cpu % BITS_PER_LONG]; p -= cpu / BITS_PER_LONG; return (const cpumask_t *)p; } This brings other advantages and simplifications as well: - we are not wasting memory that is just filled with a single bit in various different places - we don't need all those games to re-create the arrays in some dense format, because they're already going to be dense enough. if we compile a kernel for up to 4k CPU's, "wasting" that 64kB of memory is a non-issue (especially since by doing this "overlapping" trick we probably get better cache behaviour anyway). [ mingo@elte.hu: Converted Linus's mails into a commit. See: http://lkml.org/lkml/2008/7/27/156 http://lkml.org/lkml/2008/7/28/320 Also applied a family filter - which also has the side-effect of leaving out the bits where Linus calls me an idio... Oh, never mind ;-) ] Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * cpumask: put cpumask_of_cpu_map in the initdata sectionMike Travis2008-07-261-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | * Create the cpumask_of_cpu_map statically in the init data section using NR_CPUS but replace it during boot up with one sized by nr_cpu_ids (num possible cpus). Signed-off-by: Mike Travis <travis@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jack Steiner <steiner@sgi.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | x86: print per_cpu data addressYinghai Lu2008-07-311-1/+8
|/ | | | | | | to make sure per_cpu data on correct node. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: convert Dprintk to pr_debugThomas Gleixner2008-07-211-3/+3
| | | | | | | | There are a couple of places where (P)Dprintk is used which is an old compile time enabled printk wrapper. Convert it to the generic pr_debug(). Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: change _node_to_cpumask_ptr to return const ptrMike Travis2008-07-131-4/+4
| | | | | | | | | | | | * Strengthen the return type for the _node_to_cpumask_ptr to be a const pointer. This adds compiler checking to insure that node_to_cpumask_map[] is not changed inadvertently. Signed-off-by: Mike Travis <travis@sgi.com> Cc: "akpm@linux-foundation.org" <akpm@linux-foundation.org> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Acked-by: Vegard Nossum <vegard.nossum@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move prefill_possible_map calling earlyYinghai Lu2008-07-081-10/+0
| | | | | | | | | | call it right after we are done with MADT/mptable handling, instead of doing that in setup_per_cpu_areas() later on... this way for_possible_cpu() can be used early. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: add check for node passed to node_to_cpumask, v3Mike Travis2008-07-081-3/+23
| | | | | | | | | | | | | | | | * When CONFIG_DEBUG_PER_CPU_MAPS is set, the node passed to node_to_cpumask and node_to_cpumask_ptr should be validated. If invalid, then a dump_stack is performed and a zero cpumask is returned. v2: Slightly different version to remove a compiler warning. v3: Redone to reflect moving setup.c -> setup_percpu.c Signed-off-by: Mike Travis <travis@sgi.com> Cc: Vegard Nossum <vegard.nossum@gmail.com> Cc: "akpm@linux-foundation.org" <akpm@linux-foundation.org> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move parse elfvorehdr back to setup.cYinghai Lu2008-07-081-19/+0
| | | | | Signed-off-by: Yinghai <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move reserve_standard_io_resources back to setup.cYinghai Lu2008-07-081-32/+0
| | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move back crashkernel back to setup.cYinghai Lu2008-07-081-57/+0
| | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move parse_setup_data back to setup.cYinghai Lu2008-07-081-25/+0
| | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: move boot_params back to setup.cYinghai Lu2008-07-081-6/+0
| | | | | Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: rename setup.c to setup_percpu.cYinghai Lu2008-07-081-0/+528
some functions need to be moved to setup_numa.c after we merge setup32/64.c, some funcs need to be moved back to setup.c Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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