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* Merge branch 'ptebits' into develRussell King2008-10-0929-468/+333
|\ | | | | | | | | | | Conflicts: arch/arm/Kconfig
| * [ARM] Don't include asm/elf.h in asm codeRussell King2008-10-0122-22/+22
| | | | | | | | | | | | asm code really wants asm/hwcap.h, so include that instead. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] Remove MT_DEVICE_IXP2000 and associated definitionsRussell King2008-10-014-10/+3
| | | | | | | | | | | | | | | | As of the previous commit, MT_DEVICE_IXP2000 encodes to the same PTE bit encoding as MT_DEVICE, so it's now redundant. Convert MT_DEVICE_IXP2000 to use MT_DEVICE instead, and remove its aliases. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] Update Xscale and Xscale3 PTE mappingsRussell King2008-10-012-9/+7
| | | | | | | | | | | | | | Use 'shared device' mappings for devices, and use the standard bit combinations for Xscale3. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] remove 'prot_pte_ext' from memory type tableRussell King2008-10-013-5/+2
| | | | | | | | | | | | | | This member is now redundant; the memory type is encoded in the Linux PTE bits. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] Convert ARMv7 to use TEX remappingRussell King2008-10-011-4/+33
| | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] Convert ARMv6 and ARMv7 to use new memory typesRussell King2008-10-016-12/+38
| | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] Convert Xscale and Xscale3 to use new memory typesRussell King2008-10-012-29/+53
| | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] Introduce new PTE memory type bitsRussell King2008-10-014-37/+40
| | | | | | | | | | | | | | | | | | | | | | | | Provide L_PTE_MT_xxx definitions to describe the memory types that we use in Linux/ARM. These definitions are carefully picked such that: 1. their LSBs match what is required for pre-ARMv6 CPUs. 2. they all have a unique encoding, including after modification by build_mem_type_table() (the result being that some have more than one combination.) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] Convert set_pte_ext implementions to macrosRussell King2008-10-0118-402/+177
| | | | | | | | | | | | | | There are actually only four separate implementations of set_pte_ext. Use assembler macros to insert code for these into the proc-*.S files. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 5241/1: provide ioremap_wc()Lennert Buytenhek2008-09-061-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch provides an ARM implementation of ioremap_wc(). We use different page table attributes depending on which CPU we are running on: - Non-XScale ARMv5 and earlier systems: The ARMv5 ARM documents four possible mapping types (CB=00/01/10/11). We can't use any of the cached memory types (CB=10/11), since that breaks coherency with peripheral devices. Both CB=00 and CB=01 are suitable for _wc, and CB=01 (Uncached/Buffered) allows the hardware more freedom than CB=00, so we'll use that. (The ARMv5 ARM seems to suggest that CB=01 is allowed to delay stores but isn't allowed to merge them, but there is no other mapping type we can use that allows the hardware to delay and merge stores, so we'll go with CB=01.) - XScale v1/v2 (ARMv5): same as the ARMv5 case above, with the slight difference that on these platforms, CB=01 actually _does_ allow merging stores. (If you want noncoalescing bufferable behavior on Xscale v1/v2, you need to use XCB=101.) - Xscale v3 (ARMv5) and ARMv6+: on these systems, we use TEXCB=00100 mappings (Inner/Outer Uncacheable in xsc3 parlance, Uncached Normal in ARMv6 parlance). The ARMv6 ARM explicitly says that any accesses to Normal memory can be merged, which makes Normal memory more suitable for _wc mappings than Device or Strongly Ordered memory, as the latter two mapping types are guaranteed to maintain transaction number, size and order. We use the Uncached variety of Normal mappings for the same reason that we can't use C=1 mappings on ARMv5. The xsc3 Architecture Specification documents TEXCB=00100 as being Uncacheable and allowing coalescing of writes, which is also just what we need. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 5229/3: Replace some ARMv7 opcodes with the instruction nameCatalin Marinas2008-10-031-1/+1
| | | | | | | | | | | | | | | | | | These instructions were placed in the code directly as opcodes because early compilers didn't support them. Toolchains supporting ARMv7 understand these instructions and the patch puts the mnemonics back. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] mm: finish ARM sparsemem supportRussell King2008-10-011-29/+57
| | | | | | | | | | | | | | | | | | ... including some comments about the ordering required to bring sparsemem up. You have to repeatedly guess, test, reguess, try again and again to work out what the right ordering is. Many hours later... Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] mm: provide helpers for accessing membanksRussell King2008-10-011-31/+28
| | | | | | | | | | | | | | | | Provide helpers for getting physical addresses or pfns from the meminfo array, and use them. Move for_each_nodebank() to asm/setup.h alongside the meminfo structure definition. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] mm: move vmalloc= parsing to arch/arm/mm/mmu.cRussell King2008-09-301-0/+22
| | | | | | | | | | | | | | | | | | There's no point scattering this around the tree, the parsing of the parameter might as well live beside the code which uses it. That also means we can make vmalloc_reserve a static variable. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] mm: move validation of membanks to one placeRussell King2008-09-303-12/+19
| | | | | | | | | | | | | | | | The newly introduced sanity_check_meminfo() function should be used to collect all validation of the meminfo array, which we have in bootmem_init(). Move it there. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 5272/1: remove conditional compilation in show_pte()Nicolas Pitre2008-09-301-3/+2
| | | | | | | | | | | | | | | | The PTRS_PER_PMD != 1 condition can be evaluated with C code and optimized at compile time. Signed-off-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] dma: don't touch cache on dma_*_for_cpu()Russell King2008-09-301-6/+2
| | | | | | | | | | | | | | | | | | | | As per the dma_unmap_* calls, we don't touch the cache when a DMA buffer transitions from device to CPU ownership. Presently, no problems have been identified with speculative cache prefetching which in itself is a new feature in later architectures. We may have to revisit the DMA API later for these architectures anyway. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] dma: Reduce to one dma_sync_sg_* implementationRussell King2008-09-291-2/+8
| | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] dma: Reduce to one dma_map_sg()/dma_unmap_sg() implementationRussell King2008-09-251-8/+16
| | | | | | | | | | | | | | No point having two of these; dma_map_page() can do all the work for us. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] Update dma_map_sg()/dma_unmap_sg() APIRussell King2008-09-251-0/+92
| | | | | | | | | | | | Update the ARM DMA scatter gather APIs for the scatterlist changes. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] dma: rename consistent.c to dma-mapping.cRussell King2008-09-252-2/+2
| | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] Convert asm/io.h to linux/io.hRussell King2008-09-064-5/+4
| | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] Convert asm/uaccess.h to linux/uaccess.hRussell King2008-09-063-3/+3
| | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] clean up a load of old declarationsRussell King2008-09-064-7/+2
| | | | | | | | | | | | ... some of which are now in linux/*.h headers. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] move initrd code from kernel/setup.c to mm/init.cRussell King2008-09-061-2/+37
| | | | | | | | | | | | | | This quietens some sparse warnings about phys_initrd_start and phys_initrd_size. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] sparse: fix several warningsRussell King2008-09-053-5/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | arch/arm/kernel/process.c:270:6: warning: symbol 'show_fpregs' was not declared. Should it be static? This function isn't used, so can be removed. arch/arm/kernel/setup.c:532:9: warning: symbol 'len' shadows an earlier one arch/arm/kernel/setup.c:524:6: originally declared here A function containing two 'len's. arch/arm/mm/fault-armv.c:188:13: warning: symbol 'check_writebuffer_bugs' was not declared. Should it be static? arch/arm/mm/mmap.c:122:5: warning: symbol 'valid_phys_addr_range' was not declared. Should it be static? arch/arm/mm/mmap.c:137:5: warning: symbol 'valid_mmap_phys_addr_range' was not declared. Should it be static? Missing includes. arch/arm/kernel/traps.c:71:77: warning: Using plain integer as NULL pointer arch/arm/mm/ioremap.c:355:46: error: incompatible types in comparison expression (different address spaces) Sillies. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 5227/1: Add the ENDPROC declarations to the .S filesCatalin Marinas2008-09-015-0/+22
| | | | | | | | | | | | | | | | | | This declaration specifies the "function" type and size for various assembly functions, mainly needed for generating the correct branch instructions in Thumb-2. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] cachetype: move definitions to separate headerRussell King2008-09-013-0/+3
| | | | | | | | | | | | | | | | Rather than pollute asm/cacheflush.h with the cache type definitions, move them to asm/cachetype.h, and include this new header where necessary. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] cputype: separate definitions, use themRussell King2008-09-014-3/+7
|/ | | | | | | | Add asm/cputype.h, moving functions and definitions from asm/system.h there. Convert all users of 'processor_id' to the more efficient read_cpuid_id() function. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] add proc-macros.S include to proc-arm940 and proc-arm946Russell King2008-08-122-0/+2
| | | | | | ... otherwise these fail to build. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* [ARM] prevent crashing when too much RAM installedLennert Buytenhek2008-08-091-0/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch will truncate and/or ignore memory banks if their kernel direct mappings would (partially) overlap with the vmalloc area or the mappings between the vmalloc area and the address space top, to prevent crashing during early boot if there happens to be more RAM installed than we are expecting. Since the start of the vmalloc area is not at a fixed address (but the vmalloc end address is, via the per-platform VMALLOC_END define), a default area of 128M is reserved for vmalloc mappings, which can be shrunk or enlarged by passing an appropriate vmalloc= command line option as it is done on x86. On a board with a 3:1 user:kernel split, VMALLOC_END at 0xfe000000, two 512M RAM banks and vmalloc=128M (the default), this patch gives: Truncating RAM at 20000000-3fffffff to -35ffffff (vmalloc region overlap). Memory: 512MB 352MB = 864MB total On a board with a 3:1 user:kernel split, VMALLOC_END at 0xfe800000, two 256M RAM banks and vmalloc=768M, this patch gives: Truncating RAM at 00000000-0fffffff to -0e7fffff (vmalloc region overlap). Ignoring RAM at 10000000-1fffffff (vmalloc region overlap). Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Riku Voipio <riku.voipio@iki.fi>
* [ARM] Move include/asm-arm/plat-orion to arch/arm/plat-orion/include/platLennert Buytenhek2008-08-091-1/+1
| | | | | | | This patch performs the equivalent include directory shuffle for plat-orion, and fixes up all users. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
* [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/machRussell King2008-08-076-6/+6
| | | | | | This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixesRussell King2008-08-071-0/+8
|\
| * Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2008-08-036-37/+213
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 5182/1: pxa: Fix pcm990 compilation [ARM] Fix explicit asm(-arm)?/arch-foo references [ARM] move include/asm-arm to arch/arm/include/asm [ARM] Remove explicit dependency for misc.o from compressed/Makefile [ARM] initrd: claim initrd memory exclusively [ARM] pxa: add support for L2 outer cache on XScale3 (attempt 2) [ARM] 5180/1: at91: Fix at91_nand -> atmel_nand rename fallout [ARM] add Sascha Hauer as Freescale i.MX Maintainer [ARM] i.MX: add missing clock functions exports [ARM] i.MX: remove set_imx_fb_info() export [ARM] mx1ads: make mmc platform data available for modules [ARM] mx2: add missing Kconfig dependency
| * \ Merge branch 'linus' into core/generic-dma-coherentIngo Molnar2008-07-294-22/+26
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/Kconfig Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | ARM: support generic per-device coherent dma memDmitry Baryshkov2008-07-181-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | [ARM] Remove asm/hardware.h, use asm/arch/hardware.h insteadRussell King2008-08-076-6/+6
| |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | Remove includes of asm/hardware.h in addition to asm/arch/hardware.h. Then, since asm/hardware.h only exists to include asm/arch/hardware.h, update everything to directly include asm/arch/hardware.h and remove asm/hardware.h. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | [ARM] move include/asm-arm to arch/arm/include/asmRussell King2008-08-022-2/+2
| | | | | | | | | | | | | | | | | | | | | Move platform independent header files to arch/arm/include/asm, leaving those in asm/arch* and asm/plat* alone. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | [ARM] initrd: claim initrd memory exclusivelyRussell King2008-07-301-12/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Claim the initrd memory exclusively, and order other memory reservations beforehand. This allows us to determine whether the initrd memory was overwritten, and disable the initrd in that case. This avoids a 'bad page state' bug. Tested-by: Ralph Siemsen <ralphs@netwinder.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | [ARM] pxa: add support for L2 outer cache on XScale3 (attempt 2)Eric Miao2008-07-283-22/+190
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (20072fd0c93349e19527dd2fa9588b4335960e62 lost most of its changes somehow, came from a mbox archive applied with git-am. No idea what happened. This puts back the missing bits. --rmk) The initial patch from Lothar, and Lennert make it into a cleaner one, modified and tested on PXA320 by Eric Miao. This patch moves the L2 cache operations out of proc-xsc3.S into dedicated outer cache support code. CACHE_XSC3L2 can be deselected so no L2 cache specific code will be linked in, and that L2 enable bit will not be set, this applies to the following cases: a. _only_ PXA300/PXA310 support included and no L2 cache wanted b. PXA320 support included, but want L2 be disabled So the enabling of L2 depends on two things: - CACHE_XSC3L2 is selected - and L2 cache is present Where the latter is only a safeguard (previous testing shows it works OK even when this bit is turned on). IXP series of processors with XScale3 cannot disable L2 cache for the moment since they depend on the L2 cache for its coherent memory, so IXP may always select CACHE_XSC3L2. Other L2 relevant bits are always turned on (i.e. the original code enclosed by #if L2_CACHE_ENABLED .. #endif), as they showed no side effects. Specifically, these bits are: - OC bits in TTBASE register (table walk outer cache attributes) - LLR Outer Cache Attributes (OC) in Auxiliary Control Register Signed-off-by: Lothar WaÃ<9f>mann <LW@KARO-electronics.de> Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | [ARM] mx2: add missing Kconfig dependencySascha Hauer2008-07-281-1/+1
| |/ |/| | | | | | | | | | | | | | | It seems this small label was lost in the last merge. Without it no CPU type is selected for the MX2 family of processors. And a build will fail badly... Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* | [ARM] Fix shared mmap when more than two maps of the same file existRussell King2008-07-271-3/+7
| | | | | | | | | | | | | | | | | | The shared mmap code works fine for the test case, which only checked for two shared maps of the same file. However, three shared maps result in one mapping remaining cached, resulting in stale data being visible via that mapping. Fix this. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | mm: drop unneeded pgdat argument from free_area_init_node()Johannes Weiner2008-07-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | free_area_init_node() gets passed in the node id as well as the node descriptor. This is redundant as the function can trivially get the node descriptor itself by means of NODE_DATA() and the node's id. I checked all the users and NODE_DATA() seems to be usable everywhere from where this function is called. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | mm: move bootmem descriptors definition to a single placeJohannes Weiner2008-07-241-18/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are a lot of places that define either a single bootmem descriptor or an array of them. Use only one central array with MAX_NUMNODES items instead. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Acked-by: Ralf Baechle <ralf@linux-mips.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Richard Henderson <rth@twiddle.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Tony Luck <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Kyle McMartin <kyle@parisc-linux.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: David S. Miller <davem@davemloft.net> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'pxa' into develRussell King2008-07-131-0/+2
|\ \ | |/ |/| | | | | | | | | Conflicts: arch/arm/configs/em_x270_defconfig arch/arm/configs/xm_x270_defconfig
| * [ARM] pxa: add support for L2 outer cache on XScale3Eric Miao2008-07-091-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The initial patch from Lothar, and Lennert make it into a cleaner one, modified and tested on PXA320 by Eric Miao. This patch moves the L2 cache operations out of proc-xsc3.S into dedicated outer cache support code. CACHE_XSC3L2 can be deselected so no L2 cache specific code will be linked in, and that L2 enable bit will not be set, this applies to the following cases: a. _only_ PXA300/PXA310 support included and no L2 cache wanted b. PXA320 support included, but want L2 be disabled So the enabling of L2 depends on two things: - CACHE_XSC3L2 is selected - and L2 cache is present Where the latter is only a safeguard (previous testing shows it works OK even when this bit is turned on). IXP series of processors with XScale3 cannot disable L2 cache for the moment since they depend on the L2 cache for its coherent memory, so IXP may always select CACHE_XSC3L2. Other L2 relevant bits are always turned on (i.e. the original code enclosed by #if L2_CACHE_ENABLED .. #endif), as they showed no side effects. Specifically, these bits are: - OC bits in TTBASE register (table walk outer cache attributes) - LLR Outer Cache Attributes (OC) in Auxiliary Control Register Signed-off-by: Lothar WaÃ<9f>mann <LW@KARO-electronics.de> Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | Merge branch 'imx' into develRussell King2008-07-101-2/+15
|\ \ | | | | | | | | | | | | | | | Conflicts: arch/arm/mm/Kconfig
| * | i.MX2 family: Add basic mach supportJuergen Beisert2008-07-051-2/+2
| |/ | | | | | | | | | | | | | | | | | | | | This patch adds basic mach support for the mx2 processor family, based on the original freescale code and adapted to mainline kernel coding style. This part adds the global build only. Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
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