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* Add linux-next specific files for 20161224next-20161224Stephen Rothwell2016-12-245-0/+2945
| | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
* Merge branch 'akpm/master'Stephen Rothwell2016-12-24259-1445/+1264
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| * scripts/spelling.txt: add "followings" pattern and fix typo instancesMasahiro Yamada2016-12-2426-30/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: followings||following While we are here, add a missing colon in the boilerplate in DT binding documents. The "you SoC" in allwinner,sunxi-pinctrl.txt was fixed as well. I reworded "as the followings:" to "as follows:" for drivers/usb/gadget/udc/renesas_usb3.c. Link: http://lkml.kernel.org/r/1481573103-11329-32-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "therfore" pattern and fix typo instancesMasahiro Yamada2016-12-244-6/+7
| | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: therfore||therefore Besides, tidy up comment blocks for 80-col wrapping. Link: http://lkml.kernel.org/r/1481573103-11329-31-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "overwriten" pattern and fix typo instancesMasahiro Yamada2016-12-247-6/+7
| | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: overwrien||overwritten Link: http://lkml.kernel.org/r/1481573103-11329-30-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "overwritting" pattern and fix typo instancesMasahiro Yamada2016-12-247-6/+7
| | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: overwritting||overwriting Link: http://lkml.kernel.org/r/1481573103-11329-29-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "deintialize(d)" pattern and fix typo instancesMasahiro Yamada2016-12-246-5/+8
| | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: deintializing||deinitializing deintialize||deinitialize deintialized||deinitialized Link: http://lkml.kernel.org/r/1481573103-11329-28-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "disassocation" pattern and fix typo instancesMasahiro Yamada2016-12-244-3/+4
| | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: disassocation||disassociation Link: http://lkml.kernel.org/r/1481573103-11329-27-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "omited" pattern and fix typo instancesMasahiro Yamada2016-12-244-3/+5
| | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: omited||omitted omiting||omitting Link: http://lkml.kernel.org/r/1481573103-11329-26-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "explictely" pattern and fix typo instancesMasahiro Yamada2016-12-243-2/+3
| | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: explictely||explicitly Link: http://lkml.kernel.org/r/1481573103-11329-25-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "applys" pattern and fix typo instancesMasahiro Yamada2016-12-244-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: applys||applies The "applyes" in drivers/video/fbdev/aty/radeon_monitor.c is a different pattern but it was fixed in this commit. The "This functions" in the same line was fixed as well. Link: http://lkml.kernel.org/r/1481573103-11329-24-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "configuartion" pattern and fix typo instancesMasahiro Yamada2016-12-246-14/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: configuartion||configuration While we are here, fix the "ouput" as well in the touched hunk in drivers/media/dvb-frontends/drx39xyj/drx_driver.h. Link: http://lkml.kernel.org/r/1481573103-11329-23-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "overrided" pattern and fix typo instancesMasahiro Yamada2016-12-249-11/+12
| | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: overrided||overridden Link: http://lkml.kernel.org/r/1481573103-11329-22-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "overide" pattern and fix typo instancesMasahiro Yamada2016-12-2416-19/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: overide||override While we are here, fix the doubled "address" in the touched line Documentation/devicetree/bindings/regulator/ti-abb-regulator.txt. Also, fix the comment block style in the touched hunks in drivers/media/dvb-frontends/drx39xyj/drx_driver.h. Link: http://lkml.kernel.org/r/1481573103-11329-21-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "disble(d)" pattern and fix typo instancesMasahiro Yamada2016-12-2418-19/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: disble||disable disbled||disabled I kept the TSL2563_INT_DISBLED in /drivers/iio/light/tsl2563.c untouched. The macro is not referenced at all, but this commit is touching only comment blocks just in case. Link: http://lkml.kernel.org/r/1481573103-11329-20-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "comsume(r)" pattern and fix typo instancesMasahiro Yamada2016-12-248-8/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: comsume||consume comsumer||consumer comsuming||consuming I see some variable names with this pattern, but this commit is only touching comment blocks to avoid unexpected impact. Link: http://lkml.kernel.org/r/1481573103-11329-19-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "intialise(d)" pattern and fix typo instancesMasahiro Yamada2016-12-246-8/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: intialisation||initialisation intialised||initialised intialise||initialise This commit does not intend to change the British spelling itself. Link: http://lkml.kernel.org/r/1481573103-11329-18-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "initialiazation" pattern and fix typo instancesMasahiro Yamada2016-12-243-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: initialiazation||initialization While we are here, fix the "overriden" in the touched line in drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c. Link: http://lkml.kernel.org/r/1481573103-11329-17-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "intialization" pattern and fix typo instancesMasahiro Yamada2016-12-2416-27/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: intialization||initialization The "inintialization" in drivers/acpi/spcr.c is a different pattern but I fixed it as well in this commit. Link: http://lkml.kernel.org/r/1481573103-11329-16-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "unneded" pattern and fix typo instancesMasahiro Yamada2016-12-243-2/+3
| | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: unneded||unneeded Link: http://lkml.kernel.org/r/1481573103-11329-15-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "neded" pattern and fix typo instancesMasahiro Yamada2016-12-243-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: neded||needed While we are here, fix the "overriden", "wont", and "etc" in the same hunk in drivers/media/usb/tm6000/tm6000-input.c. Link: http://lkml.kernel.org/r/1481573103-11329-14-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "againt" pattern and fix typo instancesMasahiro Yamada2016-12-243-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: againt||against While we are here, fix the "capabilites" as well in the touched hunk in drivers/gpu/drm/drm_probe_helper.c. Link: http://lkml.kernel.org/r/1481573103-11329-13-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "embeded" pattern and fix typo instancesMasahiro Yamada2016-12-244-3/+4
| | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: embeded||embedded Link: http://lkml.kernel.org/r/1481573103-11329-12-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "varible" pattern and fix typo instancesMasahiro Yamada2016-12-246-9/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: varible||variable While we are here, tidy up the comment blocks that fit in a single line for drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c and net/sctp/transport.c. Link: http://lkml.kernel.org/r/1481573103-11329-11-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "efective" pattern and fix typo instancesMasahiro Yamada2016-12-243-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: efective||effective While we are here, fix the "addres" as well in the touched line in arch/openrisc/kernel/entry.S. Link: http://lkml.kernel.org/r/1481573103-11329-10-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "algined" pattern and fix typo instancesMasahiro Yamada2016-12-243-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: algined||aligned While we are here, fix the "appplication" in the touched line in drivers/block/loop.c. Also, fix the "may not naturally ..." to "may not be naturally ..." in the touched line in mm/page_alloc. Link: http://lkml.kernel.org/r/1481573103-11329-9-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "aligment" pattern and fix typo instancesMasahiro Yamada2016-12-2414-23/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: aligment||alignment I did not touch the "N_BYTE_ALIGMENT" macro in drivers/net/wireless/realtek/rtlwifi/wifi.h to avoid unpredictable impact. I fixed "_aligment_handler" in arch/openrisc/kernel/entry.S because it is surrounded by #if 0 ... #endif. It is surely safe and I confirmed "_alignment_handler" is correct. I also fixed the "controler" I found in the same hunk in arch/openrisc/kernel/head.S. Link: http://lkml.kernel.org/r/1481573103-11329-8-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "partiton" pattern and fix typo instancesMasahiro Yamada2016-12-2411-13/+13
| | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: partiton||partition Link: http://lkml.kernel.org/r/1481573103-11329-7-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "an one" pattern and fix typo instancesMasahiro Yamada2016-12-245-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: an one||a one I dropped the "an" before "one or more" in drivers/net/ethernet/sfc/mcdi_pcol.h. Link: http://lkml.kernel.org/r/1481573103-11329-6-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "an union" pattern and fix typo instancesMasahiro Yamada2016-12-2414-18/+19
| | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: an union||a union Link: http://lkml.kernel.org/r/1481573103-11329-5-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "an user" pattern and fix typo instancesMasahiro Yamada2016-12-2419-25/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: an user||a user an userspace||a userspace I also added "userspace" to the list since it is a common word in Linux. I found some instances for "an userfaultfd", but I did not add it to the list. I felt it is endless to find words that start with "user" such as "userland" etc., so must draw a line somewhere. Link: http://lkml.kernel.org/r/1481573103-11329-4-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "swithc" pattern and fix typo instancesMasahiro Yamada2016-12-245-5/+8
| | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: swithc||switch swithced||switched swithcing||switching Link: http://lkml.kernel.org/r/1481573103-11329-3-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/spelling.txt: add "swith" pattern and fix typo instancesMasahiro Yamada2016-12-2416-16/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typos and add the following to the scripts/spelling.txt: swith||switch swithable||switchable swithed||switched swithing||switching While we are here, fix the "update" to "updates" in the touched hunk in drivers/net/wireless/marvell/mwifiex/wmm.c. Link: http://lkml.kernel.org/r/1481573103-11329-2-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * reimplement-idr-and-ida-using-the-radix-tree-support-storing-null-in-the-idr ↵Andrew Morton2016-12-241-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | -checkpatch-fixes WARNING: braces {} are not necessary for single statement blocks #143: FILE: tools/testing/radix-tree/idr-test.c:88: + for (i = 0; i < 10; i++) { + assert(idr_alloc(&idr, NULL, 0, 0, GFP_KERNEL) == i); + } WARNING: braces {} are not necessary for single statement blocks #167: FILE: tools/testing/radix-tree/idr-test.c:112: + for (i = 1; i < 10; i++) { + assert(idr_alloc(&idr, NULL, 1, 0, GFP_KERNEL) == i); + } total: 0 errors, 2 warnings, 159 lines checked NOTE: For some of the reported defects, checkpatch may be able to mechanically convert to the typical style using --fix or --fix-inplace. ./patches/reimplement-idr-and-ida-using-the-radix-tree-support-storing-null-in-the-idr.patch has style problems, please review. NOTE: If any of the errors are false positives, please report them to the maintainer, see CHECKPATCH in MAINTAINERS. Please run checkpatch prior to sending patches Cc: Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * idr: support storing NULL in the IDRMatthew Wilcox2016-12-243-14/+65
| | | | | | | | | | | | | | | | | | | | | | | | | | The radix tree interprets storing NULL as a deleted entry. Several users of the IDR API use NULL as a temporary placeholder, or intentionally convert entries between NULL and non-NULL pointers to keep IDs reserved but not necessarily pointing to a valid entry at any given moment. Adapt the radix tree to cope with NULL pointers when being used as an IDR. Link: http://lkml.kernel.org/r/1481931156-23469-1-git-send-email-mawilcox@linuxonhyperv.com Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * Reimplement IDR and IDA using the radix treeMatthew Wilcox2016-12-2415-1087/+815
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The IDR is very similar to the radix tree. It has some functionality that the radix tree did not have (alloc next free, cyclic allocation, a callback-based for_each, destroy tree), which is readily implementable on top of the radix tree. A few small changes were needed in order to use a tag to represent nodes with free space below them. The IDA is reimplemented as a client of the newly enhanced radix tree. As in the current implementation, it uses a bitmap at the last level of the tree. Link: http://lkml.kernel.org/r/1481667692-14500-6-git-send-email-mawilcox@linuxonhyperv.com Signed-off-by: Matthew Wilcox <willy@infradead.org> Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Tejun Heo <tj@kernel.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * fs: add i_blocksize()Fabian Frederick2016-12-2426-50/+55
|/ | | | | | | | | | | | | | | Replace all 1 << inode->i_blkbits and (1 << inode->i_blkbits) in fs branch This patch also fixes multiple checkpatch warnings: WARNING: Prefer 'unsigned int' to bare use of 'unsigned' Thanks to Andrew Morton for suggesting more appropriate function instead of macro. Link: http://lkml.kernel.org/r/1481319905-10126-1-git-send-email-fabf@skynet.be Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* Merge branch 'akpm-current/current'Stephen Rothwell2016-12-2430-246/+976
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| * ipc/sem: add hysteresisManfred Spraul2016-12-202-26/+62
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sysv sem has two lock modes: One with per-semaphore locks, one lock mode with a single global lock for the whole array. When switching from the per-semaphore locks to the global lock, all per-semaphore locks must be scanned for ongoing operations. The patch adds a hysteresis for switching from the global lock to the per semaphore locks. This reduces how often the per-semaphore locks must be scanned. Compared to the initial patch, this is a simplified solution: Setting USE_GLOBAL_LOCK_HYSTERESIS to 1 restores the current behavior. In theory, a workload with exactly 10 simple sops and then one complex op now scales a bit worse, but this is pure theory: If there is concurrency, the it won't be exactly 10:1:10:1:10:1:... If there is no concurrency, then there is no need for scalability. Link: http://lkml.kernel.org/r/1476851896-3590-3-git-send-email-manfred@colorfullife.com Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: H. Peter Anvin <hpa@zytor.com> Cc: <1vier1@web.de> Cc: kernel test robot <xiaolong.ye@intel.com> Cc: <felixh@informatik.uni-bremen.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * ipc/sem.c: avoid using spin_unlock_wait()Manfred Spraul2016-12-201-22/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | a) The ACQUIRE in spin_lock() applies to the read, not to the store, at least for powerpc. This forces to add a smp_mb() into the fast path. b) The memory barrier provided by spin_unlock_wait() is right now arch dependent. Therefore: Use spin_lock()/spin_unlock() instead of spin_unlock_wait(). Advantage: faster single op semop calls(), observed +8.9% on x86. (the other solution would be arch dependencies in ipc/sem). Disadvantage: slower complex op semop calls, if (and only if) there are no sleeping operations. The next patch adds hysteresis, this further reduces the probability that the slow path is used. Link: http://lkml.kernel.org/r/1476851896-3590-2-git-send-email-manfred@colorfullife.com Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: H. Peter Anvin <hpa@zytor.com> Cc: <1vier1@web.de> Cc: kernel test robot <xiaolong.ye@intel.com> Cc: <felixh@informatik.uni-bremen.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * scripts/gdb: add lx-fdtdump commandPeter Griffin2016-12-202-0/+80
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | lx-fdtdump dumps the flattened device tree passed to the kernel from the bootloader to the filename specified as the command argument. If no argument is provided it defaults to fdtdump.dtb. This then allows further post processing on the machine running GDB. The fdt header is also also printed in the GDB console. For example: (gdb) lx-fdtdump fdt_magic: 0xD00DFEED fdt_totalsize: 0xC108 off_dt_struct: 0x38 off_dt_strings: 0x3804 off_mem_rsvmap: 0x28 version: 17 last_comp_version: 16 Dumped fdt to fdtdump.dtb >fdtdump fdtdump.dtb | less This command is useful as the bootloader can often re-write parts of the device tree, and this can sometimes cause the kernel to not boot. Link: http://lkml.kernel.org/r/1481280065-5336-2-git-send-email-kbingham@kernel.org Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Signed-off-by: Kieran Bingham <kbingham@kernel.org> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * kdump, vmcoreinfo: report actual value of phys_baseHATAYAMA Daisuke2016-12-202-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, VMCOREINFO note information reports the virtual address of phys_base that is assigned to symbol phys_base. But this doesn't make sense because to refer to phys_base, it's necessary to get the value of phys_base itself we are now about to refer to. Userland tools related to kdump such as makedumpfile and crash utility so far have made some efforts to calculate phys_base on crash dump formats generated by mechanisms running outside Linux kernel, such as virtual machine hypervisor such as qemu dump, which ordinary users use via virsh dump, or ones implemented on vendor specific firmware. That is, find a kernel data whose virtual and physical addresses are available via its note information and calculate phys_base from it. However, such data structure is not the one prepared for phys_base purpose. There's no guarantee that other crash dump mechanisms include such information that can be used to calculate phys_base similarly. To get VMCOREINFO in vmcore, it's easy to use strings and grep commands like this; VMCOREINFO consists of simple string: $ strings vmcore-3.10.0-121.el7.x86_64 | grep -E ".*VMCOREINFO.*" -A 100 VMCOREINFO OSRELEASE=3.10.0-121.el7.x86_64 PAGESIZE=4096 ... This is also useful to get value of phys_base in kdump 2nd kernel contained in vmcore using the above-mentioned external crash dump mechanism; kdump 2nd kernel is an inherently relocated kernel. This commit doesn't remove VMCOREINFO_SYMBOL(phys_base) line because makedumpfile refers to it and if removing it, old versions makedumpfile doesn't work well. Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp> Cc: Dave Anderson <anderson@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * lib: Add CRC64 ECMA moduleMarian Chereji2016-12-204-0/+405
| | | | | | | | | | | | | | | | | | | | | | | | | | Add implementation of CRC64 ECMA checksum. We have an IP Acceleration driver for Freescale network processors which is using this CRC64. However, it still needs some work in order for it to become upstreamable. Signed-off-by: Marian Chereji <marian.chereji@freescale.com> Reviewed-by: Varvara Andrei-B21317 <andrei.varvara@freescale.com> Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * mm/vmstat.c: walk the zone in pageblock_nr_pages stepszhong jiang2016-12-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | when walking the zone, we can happens to the holes. we should not align MAX_ORDER_NR_PAGES, so it can skip the normal memory. In addition, pagetypeinfo_showmixedcount_print reflect fragmentization. we hope to get more accurate data. therefore, I decide to fix it. Link: http://lkml.kernel.org/r/1469502526-24486-2-git-send-email-zhongjiang@huawei.com Signed-off-by: zhong jiang <zhongjiang@huawei.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * mm/page_owner: align with pageblock_nr pageszhong jiang2016-12-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | When pfn_valid(pfn) returns false, pfn should be aligned with pageblock_nr_pages other than MAX_ORDER_NR_PAGES in init_pages_in_zone, because the skipped 2M may be valid pfn, as a result, early allocated count will not be accurate. Link: http://lkml.kernel.org/r/1468938136-24228-1-git-send-email-zhongjiang@huawei.com Signed-off-by: zhong jiang <zhongjiang@huawei.com> Cc: Michal Hocko <mhocko@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * z3fold: fix locking issuesVitaly Wool2016-12-201-6/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 570931c ("z3fold: use per-page spinlock") introduced locking issues in reclaim function reported in [1] and [2]. This patch addresses these issues, also fixing the check for empty lru list (it was only checked once, while it should be checked every time we want to get the last lru entry). [1] https://lkml.org/lkml/2016/11/25/628 [2] http://www.spinics.net/lists/linux-mm/msg117227.html Link: http://lkml.kernel.org/r/20161126202121.baba91a6e67858648e5d1d2f@gmail.com Signed-off-by: Vitaly Wool <vitalywool@gmail.com> Cc: Dan Streetman <ddstreet@ieee.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * z3fold: fix header size related issuesVitaly Wool2016-12-201-74/+87
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the whole kernel build will be stopped if the size of struct z3fold_header is greater than the size of one chunk, which is 64 bytes by default. This patch instead defines the offset for z3fold objects as the size of the z3fold header in chunks. Fixed also are the calculation of num_free_chunks() and the address to move the middle chunk to in case of in-page compaction in z3fold_compact_page(). This patch is to be applied on top of commit 570931c ("z3fold: use per-page spinlock"), substituting commit 50a50d2 ("z3fold: don't fail kernel build is z3fold_header is too big"). Link: http://lkml.kernel.org/r/20161126201735.d0577eedf81c64498a22d998@gmail.com Signed-off-by: Vitaly Wool <vitalywool@gmail.com> Cc: Dan Streetman <ddstreet@ieee.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * z3fold: discourage use of pages that weren't compactedVitaly Wool2016-12-201-5/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a z3fold page couldn't be compacted, we don't want it to be used for next object allocation in the first place. It makes more sense to add it to the end of the relevant unbuddied list. If that page gets compacted later, it will be added to the beginning of the list then. This simple idea gives 5-7% improvement in randrw fio tests and about 10% improvement in fio sequential read/write. Link: http://lkml.kernel.org/r/20161115170038.75e127739b66f850e50d7fc1@gmail.com Signed-off-by: Vitaly Wool <vitalywool@gmail.com> Cc: Dan Streetman <ddstreet@ieee.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * z3fold: use per-page spinlockVitaly Wool2016-12-201-39/+97
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Most of z3fold operations are in-page, such as modifying z3fold page header or moving z3fold objects within a page. Taking per-pool spinlock to protect per-page objects is therefore suboptimal, and the idea of having a per-page spinlock (or rwlock) has been around for some time. This patch implements raw spinlock-based per-page locking mechanism which is lightweight enough to normally fit ok into the z3fold header. Link: http://lkml.kernel.org/r/20161115170014.db7859b144d44985e3805ea3@gmail.com Signed-off-by: Vitaly Wool <vitalywool@gmail.com> Cc: Dan Streetman <ddstreet@ieee.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * mm/z3fold.c: extend compaction functionVitaly Wool2016-12-201-13/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | z3fold_compact_page() currently only handles the situation where there's a single middle chunk within the z3fold page. However it may be worth it to move middle chunk closer to either first or last chunk, whichever is there, if the gap between them is big enough. Basically compression ratio wise, it always makes sense to move middle chunk as close as possible to another in-page z3fold object, because then the third object can use all the remaining space. However, moving big object just by one chunk will hurt performance without gaining much compression ratio wise. So the gap between the middle object and the edge object should be big enough to justify the move. So this patch improves compression ratio because in-page compaction becomes more comprehensive; this patch (which came as a surprise) also increases performance in fio randrw tests (I am not 100% sure why, but probably due to less actual page allocations on hot path due to denser in-page allocation). This patch adds the relevant code, using BIG_CHUNK_GAP define as a threshold for middle chunk to be worth moving. Link: http://lkml.kernel.org/r/20161103220428.984a8d09d0c9569e6bc6b8cc@gmail.com Signed-off-by: Vitaly Wool <vitalywool@gmail.com> Cc: Dan Streetman <ddstreet@ieee.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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