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2012-07-27dm mpath: add retain_attached_hw_handler featureMike Snitzer
A SCSI device handler might get attached to a device during the initial device scan. We do not necessarily want to override this when loading a multipath table, so this patch adds a new multipath feature argument "retain_attached_hw_handler". During SCSI device scan all loaded SCSI device handlers will be consulted for a match (via scsi_dh's provided .match). If a match is found that device handler will be attached. We need a way to have userspace multipathd's provided 'hw_handler' not override the already attached hardware handler. When specifying the new feature 'retain_attached_hw_handler' multipath will use the currently attached hardware handler instead of trying to attach the one specified during table load. If no hardware handler is attached the specified hardware handler will still be used. Leverages scsi_dh_attach's ability to increment the scsi_dh's reference count if the same scsi_dh name is provided when attaching - currently attached scsi_dh name is determined with scsi_dh_attached_handler_name. Depends upon commit 7e8a74b177f17d100916b6ad415450f7c9508691 ("[SCSI] scsi_dh: add scsi_dh_attached_handler_name"). Signed-off-by: Mike Snitzer <snitzer@redhat.com> Tested-by: Babu Moger <babu.moger@netapp.com> Reviewed-by: Chandra Seetharaman <sekharan@us.ibm.com> Acked-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm thin: optimize power of two block sizeMikulas Patocka
dm-thin will be most likely used with a block size that is a power of two. So it should be optimized for this case. This patch changes division and modulo operations to shifts and bit masks if block size is a power of two. A test that bi_sector is divisible by a block size is removed from io_overlaps_block. Device mapper never sends bios that span a block boundary. Consequently, if we tested that bi_size is equivalent to block size, bi_sector must already be on a block boundary. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm thin: split discards on block boundaryMikulas Patocka
This patch sets the variable "ti->split_discard_requests" for the dm thin target so that device mapper core splits discard requests on a block boundary. Consequently, a discard request that spans multiple blocks is never sent to dm-thin. The patch also removes some code in process_discard that deals with discards that span multiple blocks. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm: introduce split_discard_requestsMikulas Patocka
This patch introduces a new variable split_discard_requests. It can be set by targets so that discard requests are split on max_io_len boundaries. When split_discard_requests is not set, discard requests are only split on boundaries between targets, as was the case before this patch. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm thin: support for non power of 2 pool blocksizeMike Snitzer
Non power of 2 blocksize support is needed to properly align thinp IO on storage that has non power of 2 optimal IO sizes (e.g. RAID6 10+2). Use sector_div to support non power of 2 blocksize for the pool's data device. This provides comparable performance to the power of 2 math that was performed until now (as tested on modern x86_64 hardware). The kernel currently assumes that limits->discard_granularity is a power of two so the thin target only enables discard support if the block size is a power of two. Eliminate pool structure's 'block_shift', 'offset_mask' and remaining 4 byte holes. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm stripe: optimize chunk_size calculationsMikulas Patocka
dm-stripe is usually used with a chunk size that is a power of two. Use faster shifts and bit masks in such cases. stripe_width is already optimized in a similar way. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm stripe: remove minimum stripe sizeMikulas Patocka
There is no technical limitation in device mapper that would prevent the dm-stripe target from using a stripe size smaller than page size. This patch removes the limit and makes stripe volumes portable across architectures with different page size. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm stripe: support for non power of 2 chunksizeMike Snitzer
Support non-power-of-2 chunk sizes with dm striping for proper alignment of stripe IO on storage that has non-power-of-2 optimal IO sizes (e.g. RAID6 10+2). Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm: support non power of two target max_io_lenMike Snitzer
Remove the restriction that limits a target's specified maximum incoming I/O size to be a power of 2. Rename this setting from 'split_io' to the less-ambiguous 'max_io_len'. Change it from sector_t to uint32_t, which is plenty big enough, and introduce a wrapper function dm_set_target_max_io_len() to set it. Use sector_div() to process it now that it is not necessarily a power of 2. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm stripe: remove stripes_maskMikulas Patocka
The structure stripe_c contains a stripes_mask field. This field is useless because it can be trivially calculated by subtracting one from stripes. It is used only at one place. This patch removes it. The patch also changes ffs(stripes) - 1 to __ffs(stripes). Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm stripe: fix size testMikulas Patocka
dm-stripe is supposed to ensure that all the space allocated to the stripes is fully used and that all stripes are the same size. This patch fixes the test. It checks that device length is divisible by the chunk size and checks that the resulting quotient is divisible by the number of stripes (which is equivalent to testing if device length is divisible by chunk_size * stripes). Previously, the code only tested that the number of sectors in the target was divisible by each of the chunk size and the number of stripes separately, which could leave entire stripes unused. (A setup that genuinely needs some stripes to be shorter than others can be created by concatenating striped targets.) Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm thin: provide specific errors for two table load failure casesMike Snitzer
Provide specific error message strings for two pool_ctr() failure cases that currently give just "Unknown error". Reference: test_two_pools_pointing_to_the_same_metadata_fails and test_different_pool_cant_replace_pool in thinp-test-suite. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm: replace simple_strtoulmajianpeng
Replace obsolete simple_strtoul() with kstrtou8/kstrtouint. Signed-off-by: majianpeng <majianpeng@gmail.com> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm snapshot: remove redundant assignment in merge fnAlasdair G Kergon
Remove redundant bvm->bi_sector self-assignment in dm snapshot's origin_merge(). Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm thin metadata: introduce THIN_MAX_CONCURRENT_LOCKSJoe Thornber
Introduce THIN_MAX_CONCURRENT_LOCKS into dm-thin-metadata to give a name to an otherwise "magic" number. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm thin metadata: remove pointless label from __commit_transactionJoe Thornber
Remove the pointless label 'out' from __commit_transaction in dm-thin-metadata.c Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm persistent data: remove debug space map checkerJoe Thornber
Remove debug space map checker from dm persistent data. The space map checker is a wrapper for other space maps that double checks the reference counts are correct. It holds all these reference counts in memory rather than on disk, so uses a lot of memory and is thus restricted to small pools. As yet, this checker hasn't found any issues, but has caused a few of its own due to people turning it on by default with larger pools. Removing. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm: remove unused flush target methodJoe Thornber
Remove unused dm_flush_fn .flush target method from header. This was left-over from the FLUSH/FUA conversion and is no longer used. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm thin: clean up compiler warningMike Snitzer
Clean up "warning: dubious: !x & y". Also make it clear that __snapshotted_since() returns a bool and that dm_thin_lookup_result's 'shared' member is a flag. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27dm thin: reduce endio_hook pool sizeAlasdair G Kergon
Reduce the slab size used for the dm_thin_endio_hook mempool. Allocation has been seen to fail on machines with smaller amounts of memory due to fragmentation. lvm: page allocation failure. order:5, mode:0xd0 device-mapper: table: 253:38: thin-pool: Error creating pool's endio_hook mempool Cc: stable@vger.kernel.org Signed-off-by: Alasdair G Kergon <agk@redhat.com>
2012-07-27locks: prevent side-effects of locks_release_private before file_lock is ↵Filipe Brandenburger
initialized When calling fcntl(fd, F_SETLEASE, lck) [with lck=F_WRLCK or F_RDLCK], the custom signal or owner (if any were previously set using F_SETSIG or F_SETOWN fcntls) would be reset when F_SETLEASE was called for the second time on the same file descriptor. This bug is a regression of 2.6.37 and is described here: https://bugzilla.kernel.org/show_bug.cgi?id=43336 This patch reverts a commit from Oct 2004 (with subject "nfs4 lease: move the f_delown processing") which originally introduced the lm_release_private callback. Signed-off-by: Filipe Brandenburger <filbranden@gmail.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2012-07-27mfd: Ensure AB8500 platform data is passed through db8500-prcmu to MFD CoreLee Jones
When booting via platform code the AB8500 platform data is now passed in though the DB8500. However, if pdata_size is not set it will not be subsequently passed onto subordinate devices. This patch correctly populates pdata_size. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-07-27mfd: Arizone core should select MFD_CORESamuel Ortiz
Otherwise, with: CONFIG_MFD_ARIZONA=y CONFIG_MFD_ARIZONA_I2C=m CONFIG_MFD_CORE=m We get: drivers/built-in.o: In function `arizona_dev_init': (.devinit.text+0x3ab0): undefined reference to `mfd_add_devices' drivers/built-in.o: In function `arizona_dev_init': (.devinit.text+0x3fdc): undefined reference to `mfd_add_devices' drivers/built-in.o: In function `arizona_dev_init': (.devinit.text+0x3fff): undefined reference to `mfd_add_devices' drivers/built-in.o: In function `arizona_dev_init': (.devinit.text+0x4059): undefined reference to `mfd_remove_devices' drivers/built-in.o: In function `arizona_dev_exit': (.devexit.text+0x9): undefined reference to `mfd_remove_devices' Reported-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-07-26Merge tag 'fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Olof Johansson: "A mixed bag of fixes, some for merge window fallout (tegra, MXS), and a short series of fixes for marvell platforms that didn't make it in before 3.5." * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: mxs: fix compile error caused by prom_update_property change ARM: dt: tegra trimslice: enable USB2 port ARM: dt: tegra trimslice: add vbus-gpio property ARM: vt8500: Add maintainer for VT8500 architecture ARM: Kirkwood: Replace mrvl with marvell ARM: Orion: fix driver probe error handling with respect to clk ARM: Dove: Fixup ge00 initialisation ARM: Kirkwood: Fix PHY disable clk problems ARM: Kirkwood: Ensure runit clock always ticks. ARM: versatile: Don't use platform clock for Integrator & VE ARM: tegra: harmony: add regulator supply name and its input supply
2012-07-26Merge branch 'for-3.6-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds Pull LED subsystem update from Bryan Wu. * 'for-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds: (50 commits) leds-lp8788: forgotten unlock at lp8788_led_work LEDS: propagate error codes in blinkm_detect() LEDS: memory leak in blinkm_led_common_set() leds: add new lp8788 led driver LEDS: add BlinkM RGB LED driver, documentation and update MAINTAINERS leds: max8997: Simplify max8997_led_set_mode implementation leds/leds-s3c24xx: use devm_gpio_request leds: convert Network Space v2 LED driver to devm_kzalloc() and cleanup error exit path leds: convert DAC124S085 LED driver to devm_kzalloc() leds: convert LM3530 LED driver to devm_kzalloc() and cleanup error exit path leds: convert TCA6507 LED driver to devm_kzalloc() leds: convert Freescale MC13783 LED driver to devm_kzalloc() and cleanup error exit path leds: convert ADP5520 LED driver to devm_kzalloc() and cleanup error exit path leds: convert PCA955x LED driver to devm_kzalloc() and cleanup error exit path leds: convert Sun Fire LED driver to devm_kzalloc() and cleanup error exit path leds: convert PCA9532 LED driver to devm_kzalloc() leds: convert LT3593 LED driver to devm_kzalloc() leds: convert Renesas TPU LED driver to devm_kzalloc() and cleanup error exit path leds: convert LP5523 LED driver to devm_kzalloc() and cleanup error exit path leds: convert PCA9633 LED driver to devm_kzalloc() ...
2012-07-27drm/exynos: fixed exception to page allocation failureInki Dae
this patch corrects to deallocate the pages allocated already at alloc_page failure. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: use __free_page() to deallocate memoryInki Dae
this patch uses __free_page() to deallocate the pages allocated by alloc_page() and the pages doesn't need set_parge_dirty() and mark_page_accessed() because they aren't from page cache so removes them. this patch has a pair with previous patch below, http://www.spinics.net/lists/dri-devel/msg24382.html Changelog v2: remove unnecessary arguments. Changelog v3: fix npages type. - npages can have negative value. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: fixed a comment to gem size.Inki Dae
Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: removed unnecessary variableInki Dae
Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: do not release memory region from exporter.Inki Dae
the region should be released by exporter once dmabuf's refcount becomes 0. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: set buffer type from exporter.Inki Dae
when fd is imported to gem, whether the memory type from exporter is contigous or not should be set to gem flag so that drm-based driver can aware of the memory type. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: use alloc_page() to allocate pages.Inki Dae
shmem_read_mapping_page_gfp() first tries to allocate pages from page cache so if pages are allocated from page cache then these pages could have valid cache line. after that cpu may read garbage data from cache once gpu operation is completed with allocated pages. so with this patch, Non-contiguous memory allocation request allocates pages from highmem through alloc_page() with GFP_HIGHUSER_MOVABLE. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: fixed build warning.Inki Dae
Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: fixed edid data setting at vidi connection requestInki Dae
edid data from user should be allocated and copied into vidi context and also freed with disconnection. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: check if raw edid data is fake or not for testInki Dae
if raw edid data isn't same as fake data then it can't be tested. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: set edid fake data only for test.Inki Dae
Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: removed unnecessary declaration.Inki Dae
Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: fix buffer pitch calculationCooper Yuan
Signed-off-by: Cooper Yuan <cooperyuan@gmail.com> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: check for null in return value of dma_buf_map_attachment()Subash Patel
dma_buf_map_attachment() can return NULL and valid sg as return value. Hence the check for the returned scatter-gather must be using the inline function IS_ERR_OR_NULL() in place of IS_ERR() Signed-off-by: Subash Patel <subash.ramaswamy@linaro.org> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: return NULL if exynos_pages_to_sg failsSubash Patel
exynos_pages_to_sg() internally calls sg_kmalloc() which can return no pages when the system is under high memory crunch. One such instance is chromeos-install in the chromeos. This patch adds check for the return value of the function in subject to return NULL on failure. Signed-off-by: Subash Patel <subash.ramaswamy@linaro.org> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: Use devm_* functions in exynos_mixer.cSachin Kamat
devm_* functions are device managed functions and make error handling and cleanup cleaner and simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: Use devm_* functions in exynos_hdmi.cSachin Kamat
devm_* functions are device managed functions and make error handling and cleanup cleaner and simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: Use devm_* functions in exynos_drm_fimd.cSachin Kamat
devm_* functions are device managed functions and make error handling and cleanup cleaner and simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Sachin Kamat <sachin.kamat@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: Add missing static storage class specifierSachin Kamat
Fixes the following sparse warning: drivers/gpu/drm/exynos/exynos_drm_connector.c:199:20: warning: symbol 'exynos_drm_best_encoder' was not declared. Should it be static? Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2012-07-27drm/exynos: add property for crtc modeJoonyoung Shim
This patch adds exynos specific property for crtc mode. The crtc mode property has tow modes - normal and blank. The normal mode is default mode and can use crtc normally. The blank mode turns off the private plane of crtc, so we don't see crtc screen but can see other plane screens. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2012-07-27drm/exynos: add crtc disable functionJoonyoung Shim
The crtc disable is used to turn off private plane for crtc. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2012-07-27drm/exynos: add plane enable/disableJoonyoung Shim
The plane enable/disable can control only a power of plane, so they will be helpful to handle planes with dpms. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2012-07-27drm/exynos: remove unnecessary connector dpms controlJoonyoung Shim
The connector dpms should be controlled only by DPMS property and mode set. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2012-07-27drm/exynos: fix dpms operation for mode setJoonyoung Shim
When we do mode set, the dpms mode should be ON. Don't control dpms in crtc commit function. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
2012-07-27drm/exynos: add property for plane zposJoonyoung Shim
The exynos drm driver used a specific ioctl - DRM_EXYNOS_PLANE_SET_ZPOS to set zpos of plane. It can be substitute to property of plane. This patch adds a property for plane zpos and removes DRM_EXYNOS_PLANE_SET_ZPOS ioctl. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
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