- 21 12月, 2007 20 次提交
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由 Benjamin Herrenschmidt 提交于
This fixes a few issues with via-pmu based backlight control. First, it fixes a sign problem with the setup of the backlight curve since the `range' value there -can- (and will) go negative. Then, it reworks the interaction between this and the via-pmu sleep code to properly restore backlight on wakeup from sleep. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Scott Wood 提交于
These hooks ensure that a decrementer interrupt is not pending when suspending; otherwise, problems may occur on 6xx/7xx/7xxx-based systems (except for powermacs, which use a separate suspend path). For example, with deep sleep on the 831x, a pending decrementer will cause a system freeze because the SoC thinks the decrementer interrupt would have woken the system, but the core must have interrupts disabled due to the setup required for deep sleep. Changed via-pmu.c to use the new ppc_md hooks, and made the arch_* functions call the generic_* functions unconditionally. -- paulus Signed-off-by: NScott Wood <scottwood@freescale.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Jeremy Kerr 提交于
Based on an original patch from Arnd Bergmann <arnd.bergmann@de.ibm.com> If there's no entry in the mailbox, then a read on the _info file will return data from an uninitialised variable. This change returns EOF if there's no mailbox info available instead. Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Andre Detsch 提交于
This fixes the behavior of spufs when a spu tries a DMA operation based on a wrong / unavailable address. Instead of just generating a SIGBUS signal, spufs now generates a SIGSEGV signal and restarts the problematic DMA operation after the execution of the application's signal handler. This allows applications to employ user-level paging systems. Although the restart_dma function is called before the application's signal handler, the operation is not actually performed at this time, since the spu context is already stopped. The operation only takes place when spu_run is restarted (which happens automatically). Signed-off-by: NAndre Detsch <adetsch@br.ibm.com> Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Aegis Lin 提交于
The original spusched_timer was designed to take effect only when a context is waiting in the runqueue. This change adds an additional lower-freq timer has been added to purely handle the spu_load updates. The new timer will be triggered per LOAD_FREQ ticks. Signed-off-by: NAegis Lin <aegislin@gmail.com> Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Christoph Hellwig 提交于
Make most places that use spu_acquire/spu_acquire_saved interruptible, this allows getting out of the spufs code when e.g. pressing ctrl+c. There are a few places where we get called e.g. from spufs teardown routines were we can't simply err out so these are left with a comment. For now I've also not touched the poll routines because it's open what libspe would expect in terms of interrupted system calls. Acked-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Christoph Hellwig 提交于
The simple attr macros currently used by spufs can't deal with the handlers returning errors, which is required to make the state_mutex interruptible. This adds a local copy that allows for an error return from the get/set handlers. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Luke Browning 提交于
Change spufs_spu_run so that the context is queued directly to the scheduler and the controlling thread advances directly to spufs_wait() for spe errors and exceptions. nosched contexts are treated the same as before. Fixes from Christoph Hellwig <hch@lst.de> Signed-off-by: NLuke Browning <lukebr@linux.vnet.ibm.com> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Masato Noguchi 提交于
This changes the spu context switch code to not write to reserved bits of spu interrupt status register. The architecture book says the reserved fields should be set to zero. Signed-off-by: NMasato Noguchi <Masato.Noguchi@jp.sony.com> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Luke Browning 提交于
Need to re-check priority after dropping lock. Otherwise, a more favored context may be preempted. Signed-off-by: NLuke Browning <lukebr@linux.vnet.ibm.com> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Luke Browning 提交于
This cleans up spu_run_init so that it does all of the spu initialization for spufs_run_spu. It initializes the spu context as much as possible before it activates the spu and writes the runcntl register. Signed-off-by: NLuke Browning <lukebr@linux.vnet.ibm.com> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Jeremy Kerr 提交于
Based on original patches from Arnd Bergmann <arnd.bergman@de.ibm.com>; and Luke Browning <lukebr@linux.vnet.ibm.com> Currently, spu contexts need to be loaded to the SPU in order to take class 0 and class 1 exceptions. This change makes the actual interrupt-handlers much simpler (ie, set the exception information in the context save area), and defers the handling code to the spufs_handle_class[01] functions, called from spufs_run_spu. This should improve the concurrency of the spu scheduling leading to greater SPU utilization when SPUs are overcommited. Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Jeremy Kerr 提交于
Add a few #defines for the class 0, 1 and 2 interrupt status bits, and use them instead of magic numbers when we're setting or checking for these interrupts. Also, add a #define for the class 2 mailbox threshold interrupt mask. Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Jeremy Kerr 提交于
When doing a poll on the mbox stat file of a swapped-out context, we clear the class 0 interrupt status, rather than the class 2 interrupt status. This change corrects the poll operation to clear the correct interrupt. Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Luke Browning 提交于
This change encapsulates the spu_privcntl_RW register so that it can be written through backing ops. This is necessary so that spu contexts can be initialized and queued to the scheduler in spufs_run_spu. Signed-off-by: NLuke Browning <lukebr@linux.vnet.ibm.com> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Arnd Bergmann 提交于
This change disables the logic that faults-in spu contexts under the covers from the page fault handler. When a fault requires a runnable context, the handler will block until the context is scheduled by other means. Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Jeremy Kerr 提交于
Currently, part of the spufs code (switch.o, lscsa_alloc.o and fault.o) is compiled directly into the kernel. This change moves these components of spufs into the kernel. The lscsa and switch objects are fairly straightforward to move in. For the fault.o module, we split the fault-handling code into two parts: a/p/p/c/spu_fault.c and a/p/p/c/spufs/fault.c. The former is for the in-kernel spu_handle_mm_fault function, and we move the rest of the fault-handling code into spufs. Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Julio M. Merino Vidal 提交于
Fix a few typos in the spufs scheduler comments Signed-off-by: NJulio M. Merino Vidal <jmerino@ac.upc.edu> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Masato Noguchi 提交于
Add platform specific SPU run control routines to the spufs. The current spufs implementation uses the SPU master run control bit (MFC_SR1[S]) to control SPE execution, but the PS3 hypervisor does not support the use of this feature. This change adds the run control wrapper routies spu_enable_spu() and spu_disable_spu(). The bare metal routines use the master run control bit, and the PS3 specific routines use the priv2 run control register. An outstanding enhancement for the PS3 would be to add a guard to check for incorrect access to the spu problem state when the spu context is disabled. This check could be implemented with a flag added to the spu context that would inhibit mapping problem state pages, and a routine to unmap spu problem state pages. When the spu is enabled with ps3_enable_spu() the flag would be set allowing pages to be mapped, and when the spu is disabled with ps3_disable_spu() the flag would be cleared and mapped problem state pages would be unmapped. Signed-off-by: NMasato Noguchi <Masato.Noguchi@jp.sony.com> Signed-off-by: NGeoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: NJeremy Kerr <jk@ozlabs.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Emil Medve 提交于
When a module has relocation sections with tens of thousands of entries, counting the distinct/unique entries only (i.e. no duplicates) at load time can take tens of seconds and up to minutes. The sore point is the count_relocs() function which is called as part of the architecture specific module loading processing path: -> load_module() generic -> module_frob_arch_sections() arch specific -> get_plt_size() 32-bit -> get_stubs_size() 64-bit -> count_relocs() Here count_relocs is being called to find out how many distinct targets of R_PPC_REL24 relocations there are, since each distinct target needs a PLT entry or a stub created for it. The previous counting algorithm has O(n^2) complexity. Basically two solutions were proposed on the e-mail list: a hash based approach and a sort based approach. The hash based approach is the fastest (O(n)) but the has it needs additional memory and for certain corner cases it could take lots of memory due to the degeneration of the hash. One such proposal was submitted here: http://ozlabs.org/pipermail/linuxppc-dev/2007-June/037641.html The sort based approach is slower (O(n * log n + n)) but if the sorting is done "in place" it doesn't need additional memory. This has O(n + n * log n) complexity with no additional memory requirements. This commit implements the in-place sort option. Signed-off-by: NEmil Medve <Emilian.Medve@Freescale.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 20 12月, 2007 20 次提交
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由 Julia Lawall 提交于
There should be an of_node_put when breaking out of a loop that iterates using for_each_node_by_type. This was detected and fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ identifier d; type T; expression e; iterator for_each_node_by_type; @@ T *d; ... for_each_node_by_type(d,...) {... when != of_node_put(d) when != e = d ( return d; | + of_node_put(d); ? return ...; ) ...} // </smpl> Signed-off-by: NJulia Lawall <julia@diku.dk> Cc: Christian Krafft <krafft@de.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Erb <djerb@us.ibm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Julia Lawall 提交于
There should be an of_node_put when breaking out of a loop that iterates over calls to of_find_all_nodes, as this function does an of_node_get on the value it returns. This was fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ type T; identifier d; expression e; @@ T *d; ... for (d = NULL; (d = of_find_all_nodes(d)) != NULL; ) {... when != of_node_put(d) when != e = d ( return d; | + of_node_put(d); ? return ...; ) ...} // </smpl> Signed-off-by: NJulia Lawall <julia@diku.dk> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Julia Lawall 提交于
Remove an unnecessary pci_dev_put. pci_dev_put is called implicitly by the subsequent call to pci_get_device. The problem was detected using the following semantic patch, and corrected by hand. @@ expression dev; expression E; @@ - pci_dev_put(dev) ... when != dev = E - pci_get_device(...,dev) Signed-off-by: NJulia Lawall <julia@diku.dk> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Lucas Woods 提交于
Signed-off-by: NLucas Woods <woodzy@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Lucas Woods 提交于
Signed-off-by: NLucas Woods <woodzy@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Li Zefan 提交于
The casting is safe only when the list_head member is the first member of the structure, and even then it is better to use the address of the list_head structure member. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Cyrill Gorcunov 提交于
This fixes a possible NULL pointer dereference inside of strncmp() if of_get_property() fails. Signed-off-by: NCyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Stephen Rothwell 提交于
We were using -mno-minimal-toc on everything in arch/powerpc/kernel, which means that all the functions in there were putting all their TOC entries in the top-level TOC, and it was overflowing on an allyesconfig build. For various reasons, prom_init.c does need -mno-minimal-toc, but the other .c files in there can use sub-TOCs quite happily. This change is sufficient for now to stop the TOC overflowing; other directories under arch/powerpc also use -mno-minimal-toc and could also be changed later if necessary. Lmbench runs with and without this patch showed no significant speed differences. Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
The PCI IRQ code has a fallback when the device-tree parsing fails, that tries to map the interrupt indicated by PCI_INTERRUPT_LINE if the firmware set something in there. This is a bit fragile but has proven useful in some cases so far. However, it's causing us to incorrectly try to map interrupt 0 on various setups, so let's prevent that case, as none of the cases where the fallback is legit should have an IRQ 0. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
This patch changes the PowerPC PCI code to disable IO and/or Memory decoding on a PCI device when a resource of that type failed to be allocated. This is done to avoid having unallocated dangling BARs enabled that might try to decode on top of other devices. If a proper resource is assigned later on, then pci_enable_device() will take care of re-enabling decoding. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
Apple firmware has a strange way to "close" bridge resources by setting them to some bogus values that overlap RAM (strangely, I haven't seen it conflicting with DMA so far...). This explicitely closes them to avoid problems. Previously, they would be closed as a consequence of failing to be allocated, but this makes it more explicit, and thus the log message is more explicit too. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
The device node for the HT bridge on G5s doesn't contain useful ranges. We used to give it a bunch of the known PCI space and then punch a "hole" in it based on where the AGP or PCIe region was. This reworks it to use the actual register in the bridge that controls the decoding instead. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
This enables the PCI code to see the device that represents the HT host bridge on the PowerMac G5. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
Our implementation of pcibios_enable_device() has a couple of problems. One is that it should not check IORESOURCE_UNSET, as this might be left dangling after resource assignment (shouldn't but there are bugs), but instead, we make it check resource->parent which should be a reliable indication that the resource has been successfully claimed (it's in the resource tree). Then, we also need to skip ROM resources that haven't been enabled as x86 does. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
It should now be safe to re-assign unassigned resources on 64 bits PowerMac machines (G5s). This clears pci_probe_only on those. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
Powermac's use of the pcibios_enable_device_hook() got slightly broken by the recent PCI merge in that it won't be called for the "initial" case of assigning resources to a previously unassigned device. This was an abuse of that hook anyway, so instead we now use a header quirk. While at it, we move a #ifdef CONFIG_PPC32 to enclose more code that is only ever used on 32 bits. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
This merge the two implementations, based on the previously fixed up 32 bits one. The pcibios_enable_device_hook in ppc_md is now available for ppc64 use. Also remove the new unused "initial" parameter from it and fixup users. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
Our implementation of pcibios_enable_device() incorrectly ignores the mask argument and always checks that all resources have been allocated, which isn't the right thing to do anymore. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
The way iSeries manages PCI IO and Memory resources is a bit strange and is based on overriding the content of those resources with home cooked ones afterward. This changes it a bit to better integrate with the new resource handling so that the "virtual" tokens that iSeries replaces resources with are done from the proper per-device fixup hook, and bridge resources are set to enclose that token space. This fixes various things such as the output of /proc/iomem & ioports, among others. This also fixes up various boot messages as well. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Benjamin Herrenschmidt 提交于
The 32 bits PCI code now uses the generic code for assigning unassigned resources and an algorithm similar to x86 for claiming existing ones. This works far better than the 64 bits code which basically can only claim existing ones (pci_probe_only=1) or would fall apart completely. This merges them so that the new 32 bits implementation is used for both. 64 bits now gets the new PCI flags for controlling the behaviour, though the old pci_probe_only global is still there for now to be cleared if you want to. I kept a pcibios_claim_one_bus() function mostly based on the old 64 bits code for use by the DLPAR hotplug. This will have to be cleaned up, thought I hope it will work in the meantime. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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