- 12 Aug, 2020 40 commits
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Matthew Wilcox authored
When the definition was changed, the comment became stale. Just remove it since there isn't anything useful to say here. Fixes: b8a0255d ("include/linux/poison.h: use POISON_POINTER_DELTA for poison pointers") Signed-off-by:
Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Cc: Vasily Kulikov <segoon@openwall.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20200730174108.GJ23808@casper.infradead.orgSigned-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Alexander A. Klimov authored
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Signed-off-by:
Alexander A. Klimov <grandmaster@al2klimov.de> Signed-off-by:
Kees Cook <keescook@chromium.org> Link: http://lkml.kernel.org/r/20200726110117.16346-1-grandmaster@al2klimov.deSigned-off-by:
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Arvind Sankar authored
This seems to have been added inadvertently in commit 72deb455 ("block: remove CONFIG_LBDAF") Fixes: 72deb455 ("block: remove CONFIG_LBDAF") Signed-off-by:
Arvind Sankar <nivedita@alum.mit.edu> Signed-off-by:
Christoph Hellwig <hch@lst.de> Link: http://lkml.kernel.org/r/20200727034852.2813453-1-nivedita@alum.mit.eduSigned-off-by:
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Feng Tang authored
Recently 0day reported many strange performance changes (regression or improvement), in which there was no obvious relation between the culprit commit and the benchmark at the first look, and it causes people to doubt the test itself is wrong. Upon further check, many of these cases are caused by the change to the alignment of kernel text or data, as whole text/data of kernel are linked together, change in one domain may affect alignments of other domains. gcc has an option '-falign-functions=n' to force text aligned, and with that option enabled, some of those performance changes will be gone, like [1][2][3]. Add this option so that developers and 0day can easily find performance bump caused by text alignment change, as tracking these strange bump is quite time consuming. Though it can't help in other cases like data alignment changes like [4]. Following is some size data for v5.7 kernel built with a RHEL config used in 0day: text data bss dec filename 19738771 13292906 5554236 38585913 vmlinux.noalign 19758591 13297002 5529660 38585253 vmlinux.align32 Raw vmlinux size in bytes: v5.7 v5.7+align32 253950832 254018000 +0.02% Some benchmark data, most of them have no big change: * hackbench: [ -1.8%, +0.5%] * fsmark: [ -3.2%, +3.4%] # ext4/xfs/btrfs * kbuild: [ -2.0%, +0.9%] * will-it-scale: [ -0.5%, +1.8%] # mmap1/pagefault3 * netperf: - TCP_CRR [+16.6%, +97.4%] - TCP_RR [-18.5%, -1.8%] - TCP_STREAM [ -1.1%, +1.9%] [1] https://lore.kernel.org/lkml/20200114085637.GA29297@shao2-debian/ [2] https://lore.kernel.org/lkml/20200330011254.GA14393@feng-iot/ [3] https://lore.kernel.org/lkml/1d98d1f0-fe84-6df7-f5bd-f4cb2cdb7f45@intel.com/ [4] https://lore.kernel.org/lkml/20200205123216.GO12867@shao2-debian/Signed-off-by:Feng Tang <feng.tang@intel.com> Signed-off-by:
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Christoph Hellwig authored
Add a helper that waits for a pid and stores the status in the passed in kernel pointer. Use it to fix the usage of kernel_wait4 in call_usermodehelper_exec_sync that only happens to work due to the implicit set_fs(KERNEL_DS) for kernel threads. Signed-off-by:
"Eric W. Biederman" <ebiederm@xmission.com> Cc: Luis Chamberlain <mcgrof@kernel.org> Link: http://lkml.kernel.org/r/20200721130449.5008-1-hch@lst.deSigned-off-by:
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Randy Dunlap authored
Drop the doubled word "than" in a comment. Signed-off-by:
Randy Dunlap <rdunlap@infradead.org> Signed-off-by:
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Randy Dunlap authored
Drop the doubled word "the" in a comment. Signed-off-by:
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Randy Dunlap authored
Drop the doubled word "a" in a comment. Signed-off-by:
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Randy Dunlap authored
Drop the doubled word "the" in a comment. Signed-off-by:
Nathan Chancellor <natechancellor@gmail.com> Link: http://lkml.kernel.org/r/6a18c301-3505-742f-4dd7-0f38d0e537b9@infradead.orgSigned-off-by:
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Luc Van Oostenryck authored
These accessors must be used to read/write a big-endian bus. The value returned or written is native-endian. However, these accessors are defined using be{16,32}_to_cpu() or cpu_to_be{16,32}() to make the endian conversion but these expect a __be{16,32} when none is present. Keeping them would need a force cast that would solve nothing at all. So, do the conversion using swab{16,32}, like done in asm-generic for similar situations. Reported-by:kernel test robot <lkp@intel.com> Signed-off-by:
Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by:
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Christoph Hellwig authored
Both exec and exit want to ensure that the uaccess routines actually do access user pointers. Use the newly added force_uaccess_begin helper instead of an open coded set_fs for that to prepare for kernel builds where set_fs() does not exist. Signed-off-by:
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Christoph Hellwig authored
Add helpers to wrap the get_fs/set_fs magic for undoing any damange done by set_fs(KERNEL_DS). There is no real functional benefit, but this documents the intent of these calls better, and will allow stubbing the functions out easily for kernels builds that do not allow address space overrides in the future. [hch@lst.de: drop two incorrect hunks, fix a commit log typo] Link: http://lkml.kernel.org/r/20200714105505.935079-6-hch@lst.deSigned-off-by:
Mark Rutland <mark.rutland@arm.com> Acked-by:
Greentime Hu <green.hu@gmail.com> Acked-by:
Geert Uytterhoeven <geert@linux-m68k.org> Cc: Nick Hu <nickhu@andestech.com> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Link: http://lkml.kernel.org/r/20200710135706.537715-6-hch@lst.deSigned-off-by:
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Christoph Hellwig authored
segment_eq is only used to implement uaccess_kernel. Just open code uaccess_kernel in the arch uaccess headers and remove one layer of indirection. Signed-off-by:
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Christoph Hellwig authored
To ensure TASK_SIZE is defined for USER_DS. Signed-off-by:
Palmer Dabbelt <palmerdabbelt@google.com> Cc: Nick Hu <nickhu@andestech.com> Cc: Greentime Hu <green.hu@gmail.com> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Link: http://lkml.kernel.org/r/20200710135706.537715-4-hch@lst.deSigned-off-by:
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Christoph Hellwig authored
Use the uaccess_kernel helper instead of duplicating it. Signed-off-by:
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Christoph Hellwig authored
Patch series "clean up address limit helpers", v2. In preparation for eventually phasing out direct use of set_fs(), this series removes the segment_eq() arch helper that is only used to implement or duplicate the uaccess_kernel() API, and then adds descriptive helpers to force the kernel address limit. This patch (of 6): Use the uaccess_kernel helper instead of duplicating it. [hch@lst.de: arm: don't call addr_limit_user_check for nommu] Link: http://lkml.kernel.org/r/20200721045834.GA9613@lst.deSigned-off-by:
Guenter Roeck <linux@roeck-us.net> Acked-by:
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Randy Dunlap authored
Change "as as" to "as a". Signed-off-by:
Zi Yan <ziy@nvidia.com> Link: http://lkml.kernel.org/r/20200801173822.14973-16-rdunlap@infradead.orgSigned-off-by:
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Randy Dunlap authored
Drop the repeated word "if". Fix subject/verb agreement. Signed-off-by:
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Randy Dunlap authored
Drop the repeated word "marked". Change "time time" to "same time". Signed-off-by:
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Randy Dunlap authored
Drop the repeated word "the". Signed-off-by:
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Randy Dunlap authored
Drop the repeated word "and". Signed-off-by:
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Randy Dunlap authored
Drop the repeated word "the". Signed-off-by:
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Randy Dunlap authored
Drop the repeated word "them" and "that". Change "the the" to "to the". Signed-off-by:
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Randy Dunlap authored
Drop the repeated word "that" in two places. Signed-off-by:
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Randy Dunlap authored
Drop the repeated word "and". Signed-off-by:
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Randy Dunlap authored
Drop the repeated word "to" in two places. Signed-off-by:
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Randy Dunlap authored
Drop the repeated word "down". Signed-off-by:
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Randy Dunlap authored
Drop the repeated word "the" in two places. Signed-off-by:
Mike Kravetz <mike.kravetz@oracle.com> Reviewed-by:
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Randy Dunlap authored
Drop the repeated word "pages". Signed-off-by:
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Randy Dunlap authored
Drop the repeated word "the". Signed-off-by:
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Randy Dunlap authored
Drop the repeated word "a". Signed-off-by:
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Arvind Sankar authored
The macro is not used anywhere, so remove the definition. Signed-off-by:
David Hildenbrand <david@redhat.com> Acked-by:
Dave Hansen <dave.hansen@linux.intel.com> Acked-by:
David S. Miller <davem@davemloft.net> Acked-by:
Mike Rapoport <rppt@linux.ibm.com> Link: http://lkml.kernel.org/r/20200723231544.17274-4-nivedita@alum.mit.eduSigned-off-by:
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Arvind Sankar authored
The macro is not used anywhere, so remove the definition. Signed-off-by:
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Randy Dunlap authored
Drop the doubled word "for" in a comment. Fix spello of "incremented". Signed-off-by:
Chris Down <chris@chrisdown.name> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Link: http://lkml.kernel.org/r/b04aa2e4-7c95-12f0-599d-43d07fb28134@infradead.orgSigned-off-by:
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Randy Dunlap authored
Drop the doubled word "in" in a comment. Signed-off-by:
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Randy Dunlap authored
Change the doubled word "is" in a comment to "it is". Signed-off-by:
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Randy Dunlap authored
Drop the doubled words "to" and "the". Signed-off-by:
SeongJae Park <sjpark@amazon.de> Link: http://lkml.kernel.org/r/d9fae8d6-0d60-4d52-9385-3199ee98de49@infradead.orgSigned-off-by:
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Randy Dunlap authored
Drop the doubled words "used" and "by". Drop the repeated acronym "TLB" and make several other fixes around it. (capital letters, spellos) Signed-off-by:
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Charan Teja Reddy authored
When onlining a first memory block in a zone, pcp lists are not updated thus pcp struct will have the default setting of ->high = 0,->batch = 1. This means till the second memory block in a zone(if it have) is onlined the pcp lists of this zone will not contain any pages because pcp's ->count is always greater than ->high thus free_pcppages_bulk() is called to free batch size(=1) pages every time system wants to add a page to the pcp list through free_unref_page(). To put this in a word, system is not using benefits offered by the pcp lists when there is a single onlineable memory block in a zone. Correct this by always updating the pcp lists when memory block is onlined. Fixes: 1f522509 ("mem-hotplug: avoid multiple zones sharing same boot strapping boot_pageset") Signed-off-by:
Charan Teja Reddy <charante@codeaurora.org> Signed-off-by:
Vlastimil Babka <vbabka@suse.cz> Acked-by:
Michal Hocko <mhocko@suse.com> Cc: Vinayak Menon <vinmenon@codeaurora.org> Link: http://lkml.kernel.org/r/1596372896-15336-1-git-send-email-charante@codeaurora.orgSigned-off-by:
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Jia He authored
When check_memblock_offlined_cb() returns failed rc(e.g. the memblock is online at that time), mem_hotplug_begin/done is unpaired in such case. Therefore a warning: Call Trace: percpu_up_write+0x33/0x40 try_remove_memory+0x66/0x120 ? _cond_resched+0x19/0x30 remove_memory+0x2b/0x40 dev_dax_kmem_remove+0x36/0x72 [kmem] device_release_driver_internal+0xf0/0x1c0 device_release_driver+0x12/0x20 bus_remove_device+0xe1/0x150 device_del+0x17b/0x3e0 unregister_dev_dax+0x29/0x60 devm_action_release+0x15/0x20 release_nodes+0x19a/0x1e0 devres_release_all+0x3f/0x50 device_release_driver_internal+0x100/0x1c0 driver_detach+0x4c/0x8f bus_remove_driver+0x5c/0xd0 driver_unregister+0x31/0x50 dax_pmem_exit+0x10/0xfe0 [dax_pmem] Fixes: f1037ec0 ("mm/memory_hotplug: fix remove_memory() lockdep splat") Signed-off-by:
Jia He <justin.he@arm.com> Signed-off-by:
Dan Williams <dan.j.williams@intel.com> Cc: <stable@vger.kernel.org> [5.6+] Cc: Andy Lutomirski <luto@kernel.org> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chuhong Yuan <hslester96@gmail.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com> Cc: Kaly Xin <Kaly.Xin@arm.com> Cc: Logan Gunthorpe <logang@deltatee.com> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rich Felker <dalias@libc.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20200710031619.18762-3-justin.he@arm.comSigned-off-by:
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