- 20 Jul, 2018 9 commits
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Hiromitsu Yamasaki authored
This patch adds compatible string support for the Renesas R-Car E3 (r8a77990) SoC. Signed-off-by: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Eddie James authored
Signed-off-by: Eddie James <eajames@linux.vnet.ibm.com> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Eddie James authored
Bus recovery should reset the bus with the standard i2c recovery procedure. Populate the necessary fields so that the standard procedure can perform the reset. Signed-off-by: Eddie James <eajames@linux.vnet.ibm.com> Tested-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Eddie James authored
Since there are many ports per master, each with it's own adapter and chardev, we need some locking to prevent transfers from changing the master state while other transfers are in progress. Signed-off-by: Eddie James <eajames@linux.vnet.ibm.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Tested-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Eddie James authored
Execute I2C transfers from the FSI-attached I2C master. Use polling instead of interrupts as we have no hardware IRQ over FSI. Signed-off-by: Eddie James <eajames@linux.vnet.ibm.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Tested-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Eddie James authored
Add abort procedure for failed transfers. Add engine reset procedure that is executed during the abort to recover from various fault conditions. Signed-off-by: Eddie James <eajames@linux.vnet.ibm.com> Tested-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Eddie James authored
Add and initialize I2C adapters for each port on the FSI-attached I2C master. Ports for each master are defined in the devicetree. Signed-off-by: Eddie James <eajames@linux.vnet.ibm.com> Tested-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Eddie James authored
Add register definitions for FSI-attached I2C master and functions to access those registers over FSI. Add an FSI driver so that our I2C bus is probed up during an FSI scan. Signed-off-by: Eddie James <eajames@linux.vnet.ibm.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Tested-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Eddie James authored
Document the bindings. Signed-off-by: Eddie James <eajames@linux.vnet.ibm.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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- 17 Jul, 2018 6 commits
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Wolfram Sang authored
While refactoring the routine before, it occurred to me that this will make the code much easier to understand. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Peter Rosin <peda@axentia.se> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Wolfram Sang authored
To break out of recovery as early as possible, feed back the bus_free logic state. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Wolfram Sang authored
Some IP cores have an internal 'bus free' logic which may be more advanced than just checking if SDA is high. Add a separate callback to get this status. Filling it is optional. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Wolfram Sang authored
After exiting the while loop, we checked if recovery was successful and sent a STOP to the clients. Meanwhile however, we send a STOP after every pulse, so it is not needed after the loop. If we move the check for a free bus to the end of the while loop, we can shorten and simplify the logic. It is still ensured that at least one STOP will be sent to the wire even if SDA was not stuck low. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Peter Rosin <peda@axentia.se> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Wolfram Sang authored
For bus recovery, we either need to bail out early if we can read SDA or we need to send STOP after every pulse. Otherwise recovery might be misinterpreted as an unwanted write. So, require one of those SDA handling functions to avoid this problem. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Peter Rosin <peda@axentia.se> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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Wolfram Sang authored
Linux 4.18-rc5
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- 15 Jul, 2018 2 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull ARM SoC fixes from Olof Johansson: - A fix for OMAP5 and DRA7 to make the branch predictor hardening settings take proper effect on secondary cores - Disable USB OTG on am3517 since current driver isn't working - Fix thermal sensor register settings on Armada 38x - Fix suspend/resume IRQs on pxa3xx * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: dts: am3517.dtsi: Disable reference to OMAP3 OTG controller ARM: DRA7/OMAP5: Enable ACTLR[0] (Enable invalidates of BTB) for secondary cores ARM: pxa: irq: fix handling of ICMR registers in suspend/resume ARM: dts: armada-38x: use the new thermal binding
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- 14 Jul, 2018 19 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linuxLinus Torvalds authored
Pull RTC fixes from Alexandre Belloni: "Two fixes for 4.18: - an important core fix for RTCs using the core offsetting only one driver is affected - a fix for the error path of mrst" * tag 'rtc-4.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: rtc: fix alarm read and set offset rtc: mrst: fix error code in probe()
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Olof Johansson authored
Merge tag 'omap-for-v4.18/fixes-rc4-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes Two omap fixes for v4.18-rc cycle Turns out the recent patches for ARM branch predictor hardening are not working on omap5 and dra7 as planned because the secondary CPU is parked to the bootrom code. We can't configure it in the bootloader. So we must enable invalidates of BTB for omap5 and dra7 secondary core in the kernel. And there's a fix for reserved register access for am3517. The usb otg module on am3517 is not the same as for other omap3. * tag 'omap-for-v4.18/fixes-rc4-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: dts: am3517.dtsi: Disable reference to OMAP3 OTG controller ARM: DRA7/OMAP5: Enable ACTLR[0] (Enable invalidates of BTB) for secondary cores Signed-off-by: Olof Johansson <olof@lixom.net>
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git://git.infradead.org/linux-mvebuOlof Johansson authored
mvebu fixes for 4.18 (part 1) Use the new thermal binding on Armada 38x allowing to use a driver fix which is already part of the kernel. * tag 'mvebu-fixes-4.18-1' of git://git.infradead.org/linux-mvebu: ARM: dts: armada-38x: use the new thermal binding Signed-off-by: Olof Johansson <olof@lixom.net>
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https://github.com/rjarzmik/linuxOlof Johansson authored
This is the fixes set for v4.18 cycle. This is a fix for suspending all pxa3xx platforms, where high number interrupts are not reenabled. * tag 'pxa-fixes-4.18' of https://github.com/rjarzmik/linux: ARM: pxa: irq: fix handling of ICMR registers in suspend/resume Signed-off-by: Olof Johansson <olof@lixom.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tipLinus Torvalds authored
Pull xen fixes from Juergen Gross: "Two related fixes for a boot failure of Xen PV guests" * tag 'for-linus-4.18-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen: setup pv irq ops vector earlier xen: remove global bit from __default_kernel_pte_mask for pv guests
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull block fix from Jens Axboe: "Just a single regression fix (from 4.17) for bsg, fixing an EINVAL return on non-data commands" * tag 'for-linus-20180713' of git://git.kernel.dk/linux-block: bsg: fix bogus EINVAL on non-data commands
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Linus Torvalds authored
Merge misc fixes from Andrew Morton: "11 fixes" * emailed patches form Andrew Morton <akpm@linux-foundation.org>: reiserfs: fix buffer overflow with long warning messages checkpatch: fix duplicate invalid vsprintf pointer extension '%p<foo>' messages mm: do not bug_on on incorrect length in __mm_populate() mm/memblock.c: do not complain about top-down allocations for !MEMORY_HOTREMOVE fs, elf: make sure to page align bss in load_elf_library x86/purgatory: add missing FORCE to Makefile target net/9p/client.c: put refcount of trans_mod in error case in parse_opts() mm: allow arch to supply p??_free_tlb functions autofs: fix slab out of bounds read in getname_kernel() fs/proc/task_mmu.c: fix Locked field in /proc/pid/smaps* mm: do not drop unused pages when userfaultd is running
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Eric Biggers authored
ReiserFS prepares log messages into a 1024-byte buffer with no bounds checks. Long messages, such as the "unknown mount option" warning when userspace passes a crafted mount options string, overflow this buffer. This causes KASAN to report a global-out-of-bounds write. Fix it by truncating messages to the buffer size. Link: http://lkml.kernel.org/r/20180707203621.30922-1-ebiggers3@gmail.com Fixes: 1da177e4 ("Linux-2.6.12-rc2") Reported-by: syzbot+b890b3335a4d8c608963@syzkaller.appspotmail.com Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Joe Perches authored
Multiline statements with invalid %p<foo> uses produce multiple warnings. Fix that. e.g.: $ cat t_block.c void foo(void) { MY_DEBUG(drv->foo, "%pk", foo->boo); } $ ./scripts/checkpatch.pl -f t_block.c WARNING: Missing or malformed SPDX-License-Identifier tag in line 1 #1: FILE: t_block.c:1: +void foo(void) WARNING: Invalid vsprintf pointer extension '%pk' #3: FILE: t_block.c:3: + MY_DEBUG(drv->foo, + "%pk", + foo->boo); WARNING: Invalid vsprintf pointer extension '%pk' #3: FILE: t_block.c:3: + MY_DEBUG(drv->foo, + "%pk", + foo->boo); total: 0 errors, 3 warnings, 6 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. t_block.c has style problems, please review. NOTE: If any of the errors are false positives, please report them to the maintainer, see CHECKPATCH in MAINTAINERS. Link: http://lkml.kernel.org/r/9e8341bbe4c9877d159cb512bb701043cbfbb10b.camel@perches.comSigned-off-by: Joe Perches <joe@perches.com> Cc: "Tobin C. Harding" <me@tobin.cc> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Michal Hocko authored
syzbot has noticed that a specially crafted library can easily hit VM_BUG_ON in __mm_populate kernel BUG at mm/gup.c:1242! invalid opcode: 0000 [#1] SMP CPU: 2 PID: 9667 Comm: a.out Not tainted 4.18.0-rc3 #644 Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 05/19/2017 RIP: 0010:__mm_populate+0x1e2/0x1f0 Code: 55 d0 65 48 33 14 25 28 00 00 00 89 d8 75 21 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 75 18 f1 ff 0f 0b e8 6e 18 f1 ff <0f> 0b 31 db eb c9 e8 93 06 e0 ff 0f 1f 00 55 48 89 e5 53 48 89 fb Call Trace: vm_brk_flags+0xc3/0x100 vm_brk+0x1f/0x30 load_elf_library+0x281/0x2e0 __ia32_sys_uselib+0x170/0x1e0 do_fast_syscall_32+0xca/0x420 entry_SYSENTER_compat+0x70/0x7f The reason is that the length of the new brk is not page aligned when we try to populate the it. There is no reason to bug on that though. do_brk_flags already aligns the length properly so the mapping is expanded as it should. All we need is to tell mm_populate about it. Besides that there is absolutely no reason to to bug_on in the first place. The worst thing that could happen is that the last page wouldn't get populated and that is far from putting system into an inconsistent state. Fix the issue by moving the length sanitization code from do_brk_flags up to vm_brk_flags. The only other caller of do_brk_flags is brk syscall entry and it makes sure to provide the proper length so t here is no need for sanitation and so we can use do_brk_flags without it. Also remove the bogus BUG_ONs. [osalvador@techadventures.net: fix up vm_brk_flags s@request@len@] Link: http://lkml.kernel.org/r/20180706090217.GI32658@dhcp22.suse.czSigned-off-by: Michal Hocko <mhocko@suse.com> Reported-by: syzbot <syzbot+5dcb560fe12aa5091c06@syzkaller.appspotmail.com> Tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by: Oscar Salvador <osalvador@suse.de> Cc: Zi Yan <zi.yan@cs.rutgers.edu> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Michal Hocko authored
Mike Rapoport is converting architectures from bootmem to nobootmem allocator. While doing so for m68k Geert has noticed that he gets a scary looking warning: WARNING: CPU: 0 PID: 0 at mm/memblock.c:230 memblock_find_in_range_node+0x11c/0x1be memblock: bottom-up allocation failed, memory hotunplug may be affected Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 4.18.0-rc3-atari-01343-gf2fb5f2e09a97a3c-dirty #7 Call Trace: __warn+0xa8/0xc2 kernel_pg_dir+0x0/0x1000 netdev_lower_get_next+0x2/0x22 warn_slowpath_fmt+0x2e/0x36 memblock_find_in_range_node+0x11c/0x1be memblock_find_in_range_node+0x11c/0x1be memblock_find_in_range_node+0x0/0x1be vprintk_func+0x66/0x6e memblock_virt_alloc_internal+0xd0/0x156 netdev_lower_get_next+0x2/0x22 netdev_lower_get_next+0x2/0x22 kernel_pg_dir+0x0/0x1000 memblock_virt_alloc_try_nid_nopanic+0x58/0x7a netdev_lower_get_next+0x2/0x22 kernel_pg_dir+0x0/0x1000 kernel_pg_dir+0x0/0x1000 EXPTBL+0x234/0x400 EXPTBL+0x234/0x400 alloc_node_mem_map+0x4a/0x66 netdev_lower_get_next+0x2/0x22 free_area_init_node+0xe2/0x29e EXPTBL+0x234/0x400 paging_init+0x430/0x462 kernel_pg_dir+0x0/0x1000 printk+0x0/0x1a EXPTBL+0x234/0x400 setup_arch+0x1b8/0x22c start_kernel+0x4a/0x40a _sinittext+0x344/0x9e8 The warning is basically saying that a top-down allocation can break memory hotremove because memblock allocation is not movable. But m68k doesn't even support MEMORY_HOTREMOVE so there is no point to warn about it. Make the warning conditional only to configurations that care. Link: http://lkml.kernel.org/r/20180706061750.GH32658@dhcp22.suse.czSigned-off-by: Michal Hocko <mhocko@suse.com> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Sam Creasey <sammy@sammy.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Oscar Salvador authored
The current code does not make sure to page align bss before calling vm_brk(), and this can lead to a VM_BUG_ON() in __mm_populate() due to the requested lenght not being correctly aligned. Let us make sure to align it properly. Kees: only applicable to CONFIG_USELIB kernels: 32-bit and configured for libc5. Link: http://lkml.kernel.org/r/20180705145539.9627-1-osalvador@techadventures.netSigned-off-by: Oscar Salvador <osalvador@suse.de> Reported-by: syzbot+5dcb560fe12aa5091c06@syzkaller.appspotmail.com Tested-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Acked-by: Kees Cook <keescook@chromium.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Philipp Rudo authored
- Build the kernel without the fix - Add some flag to the purgatories KBUILD_CFLAGS,I used -fno-asynchronous-unwind-tables - Re-build the kernel When you look at makes output you see that sha256.o is not re-build in the last step. Also readelf -S still shows the .eh_frame section for sha256.o. With the fix sha256.o is rebuilt in the last step. Without FORCE make does not detect changes only made to the command line options. So object files might not be re-built even when they should be. Fix this by adding FORCE where it is missing. Link: http://lkml.kernel.org/r/20180704110044.29279-2-prudo@linux.ibm.com Fixes: df6f2801 ("kernel/kexec_file.c: move purgatories sha256 to common code") Signed-off-by: Philipp Rudo <prudo@linux.ibm.com> Acked-by: Dave Young <dyoung@redhat.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: <stable@vger.kernel.org> [4.17+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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piaojun authored
In my testing, the second mount will fail after umounting successfully. The reason is that we put refcount of trans_mod in the correct case rather than the error case in parse_opts() at last. That will cause the refcount decrease to -1, and when we try to get trans_mod again in try_module_get(), we could only increase refcount to 0 which will cause failure as follows: parse_opts v9fs_get_trans_by_name try_module_get : return NULL to caller which cause error So we should put refcount of trans_mod in error case. Link: http://lkml.kernel.org/r/5B3F39A0.2030509@huawei.com Fixes: 9421c3e6 ("net/9p/client.c: fix potential refcnt problem of trans module") Signed-off-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com> Reviewed-by: Greg Kurz <groug@kaod.org> Reviewed-by: Dominique Martinet <dominique.martinet@cea.fr> Tested-by: Dominique Martinet <dominique.martinet@cea.fr> Cc: Eric Van Hensbergen <ericvh@gmail.com> Cc: Ron Minnich <rminnich@sandia.gov> Cc: Latchesar Ionkov <lucho@ionkov.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Nicholas Piggin authored
The mmu_gather APIs keep track of the invalidated address range including the span covered by invalidated page table pages. Ranges covered by page tables but not ptes (and therefore no TLBs) still need to be invalidated because some architectures (x86) can cache intermediate page table entries, and invalidate those with normal TLB invalidation instructions to be almost-backward-compatible. Architectures which don't cache intermediate page table entries, or which invalidate these caches separately from TLB invalidation, do not require TLB invalidation range expanded over page tables. Allow architectures to supply their own p??_free_tlb functions, which can avoid the __tlb_adjust_range. Link: http://lkml.kernel.org/r/20180703013131.2807-1-npiggin@gmail.comSigned-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: "Aneesh Kumar K. V" <aneesh.kumar@linux.vnet.ibm.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Nadav Amit <nadav.amit@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Tomas Bortoli authored
The autofs subsystem does not check that the "path" parameter is present for all cases where it is required when it is passed in via the "param" struct. In particular it isn't checked for the AUTOFS_DEV_IOCTL_OPENMOUNT_CMD ioctl command. To solve it, modify validate_dev_ioctl(function to check that a path has been provided for ioctl commands that require it. Link: http://lkml.kernel.org/r/153060031527.26631.18306637892746301555.stgit@pluto.themaw.netSigned-off-by: Tomas Bortoli <tomasbortoli@gmail.com> Signed-off-by: Ian Kent <raven@themaw.net> Reported-by: syzbot+60c837b428dc84e83a93@syzkaller.appspotmail.com Cc: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Vlastimil Babka authored
Thomas reports: "While looking around in /proc on my v4.14.52 system I noticed that all processes got a lot of "Locked" memory in /proc/*/smaps. A lot more memory than a regular user can usually lock with mlock(). Commit 493b0e9d (in v4.14-rc1) seems to have changed the behavior of "Locked". Before that commit the code was like this. Notice the VM_LOCKED check. (vma->vm_flags & VM_LOCKED) ? (unsigned long)(mss.pss >> (10 + PSS_SHIFT)) : 0); After that commit Locked is now the same as Pss: (unsigned long)(mss->pss >> (10 + PSS_SHIFT))); This looks like a mistake." Indeed, the commit has added mss->pss_locked with the correct value that depends on VM_LOCKED, but forgot to actually use it. Fix it. Link: http://lkml.kernel.org/r/ebf6c7fb-fec3-6a26-544f-710ed193c154@suse.cz Fixes: 493b0e9d ("mm: add /proc/pid/smaps_rollup") Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Reported-by: Thomas Lindroth <thomas.lindroth@gmail.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Daniel Colascione <dancol@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Christian Borntraeger authored
KVM guests on s390 can notify the host of unused pages. This can result in pte_unused callbacks to be true for KVM guest memory. If a page is unused (checked with pte_unused) we might drop this page instead of paging it. This can have side-effects on userfaultd, when the page in question was already migrated: The next access of that page will trigger a fault and a user fault instead of faulting in a new and empty zero page. As QEMU does not expect a userfault on an already migrated page this migration will fail. The most straightforward solution is to ignore the pte_unused hint if a userfault context is active for this VMA. Link: http://lkml.kernel.org/r/20180703171854.63981-1-borntraeger@de.ibm.comSigned-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Janosch Frank <frankja@linux.ibm.com> Cc: David Hildenbrand <david@redhat.com> Cc: Cornelia Huck <cohuck@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pavel Tatashin authored
We must zero struct pages for memory that is not backed by physical memory, or kernel does not have access to. Recently, there was a change which zeroed all memmap for all holes in e820. Unfortunately, it introduced a bug that is discussed here: https://www.spinics.net/lists/linux-mm/msg156764.html Linus, also saw this bug on his machine, and confirmed that reverting commit 124049de ("x86/e820: put !E820_TYPE_RAM regions into memblock.reserved") fixes the issue. The problem is that we incorrectly zero some struct pages after they were setup. The fix is to zero unavailable struct pages prior to initializing of struct pages. A more detailed fix should come later that would avoid double zeroing cases: one in __init_single_page(), the other one in zero_resv_unavail(). Fixes: 124049de ("x86/e820: put !E820_TYPE_RAM regions into memblock.reserved") Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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- 13 Jul, 2018 4 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linuxLinus Torvalds authored
Pull i2c fixes from Wolfram Sang: - I2C core bugfix regarding bus recovery - driver bugfix for the tegra driver - typo correction * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: recovery: if possible send STOP with recovery pulses i2c: tegra: Fix NACK error handling i2c: stu300: use non-archaic spelling of failes
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull timer fixes from Ingo Molnar: "A clocksource driver fix and a revert" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: clocksource: arm_arch_timer: Set arch_mem_timer cpumask to cpu_possible_mask Revert "tick: Prefer a lower rating device only if it's CPU local device"
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull perf tool fixes from Ingo Molnar: "Misc tooling fixes: python3 related fixes, gcc8 fix, bashism fixes and some other smaller fixes" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf tools: Use python-config --includes rather than --cflags perf script python: Fix dict reference counting perf stat: Fix --interval_clear option perf tools: Fix compilation errors on gcc8 perf test shell: Prevent temporary editor files from being considered test scripts perf llvm-utils: Remove bashism from kernel include fetch script perf test shell: Make perf's inet_pton test more portable perf test shell: Replace '|&' with '2>&1 |' to work with more shells perf scripts python: Add Python 3 support to EventClass.py perf scripts python: Add Python 3 support to sched-migration.py perf scripts python: Add Python 3 support to Util.py perf scripts python: Add Python 3 support to SchedGui.py perf scripts python: Add Python 3 support to Core.py perf tools: Generate a Python script compatible with Python 2 and 3
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull EFI fix from Ingo Molnar: "Fix a UEFI mixed mode (64-bit kernel on 32-bit UEFI) reboot loop regression" * 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi/x86: Fix mixed mode reboot loop by removing pointless call to PciIo->Attributes()
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