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* mm: add missing __PAGETABLE_{PUD,PMD}_FOLDED definesKirill A. Shutemov2015-02-281-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page table levels folded. Usually, these defines are provided by <asm-generic/pgtable-nopmd.h> and <asm-generic/pgtable-nopud.h>. But some architectures fold page table levels in a custom way. They need to define these macros themself. This patch adds missing defines. The patch fixes mm->nr_pmds underflow and eliminates dead __pmd_alloc() and __pud_alloc() on architectures without these page table levels. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: David Howells <dhowells@redhat.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge tag 'asm-generic-for-linus' of ↵Linus Torvalds2015-02-182-21/+21
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic uaccess.h cleanup from Arnd Bergmann: "Like in 3.19, I once more have a multi-stage cleanup for one asm-generic header file, this time the work was done by Michael Tsirkin and cleans up the uaccess.h file in asm-generic, as well as all architectures for which the respective maintainers did not pick up his patches directly" * tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (37 commits) sparc32: nocheck uaccess coding style tweaks sparc64: nocheck uaccess coding style tweaks xtensa: macro whitespace fixes sh: macro whitespace fixes parisc: macro whitespace fixes m68k: macro whitespace fixes m32r: macro whitespace fixes frv: macro whitespace fixes cris: macro whitespace fixes avr32: macro whitespace fixes arm64: macro whitespace fixes arm: macro whitespace fixes alpha: macro whitespace fixes blackfin: macro whitespace fixes sparc64: uaccess_64 macro whitespace fixes sparc32: uaccess_32 macro whitespace fixes avr32: whitespace fix sh: fix put_user sparse errors metag: fix put_user sparse errors ia64: fix put_user sparse errors ...
| * m68k: macro whitespace fixesMichael S. Tsirkin2015-01-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | While working on arch/m68k/include/asm/uaccess.h, I noticed that one macro within this header is made harder to read because it violates a coding style rule: space is missing after comma. Fix it up. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * m68k/uaccess: fix sparse errorsMichael S. Tsirkin2015-01-131-20/+20
| | | | | | | | | | | | | | | | | | | | | | virtio wants to read bitwise types from userspace using get_user. At the moment this triggers sparse errors, since the value is passed through an integer. Fix that up using __force. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
* | Merge branch 'for-next' of ↵Linus Torvalds2015-02-163-40/+5
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu Pull m68knommu fixes from Greg Ungerer: "Nothing big, only a small collection of minor cleanups/fixes" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: arch: m68k: 68360: config: Remove unused function m68knommu: fix irq handler types in 68360/commproc.c m68k: remove check for CONFIG_BSEIP
| * | arch: m68k: 68360: config: Remove unused functionRickard Strandqvist2015-02-031-13/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | Remove the function BSP_set_clock_mmss() that is not used anywhere. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68knommu: fix irq handler types in 68360/commproc.cGreg Ungerer2015-02-032-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Compilation of arch/m68k/68360/commproc.c fails with the following errors: arch/m68k/68360/commproc.c:75:1: error: function declaration isn’t a prototype arch/m68k/68360/commproc.c:211:1: error: function declaration isn’t a prototype arch/m68k/68360/commproc.c: In function ‘cpm_install_handler’: arch/m68k/68360/commproc.c:214:2: warning: passing argument 2 of ‘request_irq’ from incompatible pointer type include/linux/interrupt.h:128:1: note: expected ‘irq_handler_t’ but argument is of type ‘void (*)()’ It should be using the proper irq hander type, irq_handler_t. Modify it to use that. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * | m68k: remove check for CONFIG_BSEIPPaul Bolle2015-02-031-22/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There used to be a Kconfig symbol BSEIP. It was PPC specific and was removed in v2.6.27. So the check for CONFIG_BSEIP can be removed. This means a few defines will be removed. None of the macros involved are used, so no one should care. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
* | | all arches, signal: move restart_block to struct task_structAndy Lutomirski2015-02-122-6/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If an attacker can cause a controlled kernel stack overflow, overwriting the restart block is a very juicy exploit target. This is because the restart_block is held in the same memory allocation as the kernel stack. Moving the restart block to struct task_struct prevents this exploit by making the restart_block harder to locate. Note that there are other fields in thread_info that are also easy targets, at least on some architectures. It's also a decent simplification, since the restart code is more or less identical on all architectures. [james.hogan@imgtec.com: metag: align thread_info::supervisor_stack] Signed-off-by: Andy Lutomirski <luto@amacapital.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: David Miller <davem@davemloft.net> Acked-by: Richard Weinberger <richard@nod.at> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Steven Miao <realmz6@gmail.com> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Tested-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Chen Liqin <liqin.linux@gmail.com> Cc: Lennox Wu <lennox.wu@gmail.com> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Guenter Roeck <linux@roeck-us.net> Signed-off-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | mm: make FIRST_USER_ADDRESS unsigned long on all archsKirill A. Shutemov2015-02-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | LKP has triggered a compiler warning after my recent patch "mm: account pmd page tables to the process": mm/mmap.c: In function 'exit_mmap': >> mm/mmap.c:2857:2: warning: right shift count >= width of type [enabled by default] The code: > 2857 WARN_ON(mm_nr_pmds(mm) > 2858 round_up(FIRST_USER_ADDRESS, PUD_SIZE) >> PUD_SHIFT); In this, on tile, we have FIRST_USER_ADDRESS defined as 0. round_up() has the same type -- int. PUD_SHIFT. I think the best way to fix it is to define FIRST_USER_ADDRESS as unsigned long. On every arch for consistency. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reported-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'akpm' (patches from Andrew)Linus Torvalds2015-02-104-53/+2
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge misc updates from Andrew Morton: "Bite-sized chunks this time, to avoid the MTA ratelimiting woes. - fs/notify updates - ocfs2 - some of MM" That laconic "some MM" is mainly the removal of remap_file_pages(), which is a big simplification of the VM, and which gets rid of a *lot* of random cruft and special cases because we no longer support the non-linear mappings that it used. From a user interface perspective, nothing has changed, because the remap_file_pages() syscall still exists, it's just done by emulating the old behavior by creating a lot of individual small mappings instead of one non-linear one. The emulation is slower than the old "native" non-linear mappings, but nobody really uses or cares about remap_file_pages(), and simplifying the VM is a big advantage. * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (78 commits) memcg: zap memcg_slab_caches and memcg_slab_mutex memcg: zap memcg_name argument of memcg_create_kmem_cache memcg: zap __memcg_{charge,uncharge}_slab mm/page_alloc.c: place zone_id check before VM_BUG_ON_PAGE check mm: hugetlb: fix type of hugetlb_treat_as_movable variable mm, hugetlb: remove unnecessary lower bound on sysctl handlers"? mm: memory: merge shared-writable dirtying branches in do_wp_page() mm: memory: remove ->vm_file check on shared writable vmas xtensa: drop _PAGE_FILE and pte_file()-related helpers x86: drop _PAGE_FILE and pte_file()-related helpers unicore32: drop pte_file()-related helpers um: drop _PAGE_FILE and pte_file()-related helpers tile: drop pte_file()-related helpers sparc: drop pte_file()-related helpers sh: drop _PAGE_FILE and pte_file()-related helpers score: drop _PAGE_FILE and pte_file()-related helpers s390: drop pte_file()-related helpers parisc: drop _PAGE_FILE and pte_file()-related helpers openrisc: drop _PAGE_FILE and pte_file()-related helpers nios2: drop _PAGE_FILE and pte_file()-related helpers ...
| * | | m68k: drop _PAGE_FILE and pte_file()-related helpersKirill A. Shutemov2015-02-104-53/+2
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | We've replaced remap_file_pages(2) implementation with emulation. Nobody creates non-linear mapping anymore. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2015-02-1022-368/+774
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k Pull m68k updates from Geert Uytterhoeven: "Summary: - switch to asm-generic/futex.h - various cleanups - defconfig updates" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k/defconfig: Enable Ethernet bridging m68k/defconfig: Enable Atari EtherNAT and EtherNEC Ethernet support m68k/defconfig: Enable automounting of devtmpfs at /dev m68k/defconfig: Enable early printk support m68k/defconfig: Enable test modules m68k/defconfig: Refresh defconfigs for v3.16-rc1--v3.19-rc2 m68k/atari: Remove obsolete IRQ_TYPE_* sound: dmasound_atari: Remove obsolete IRQ_TYPE_SLOW video: atafb: Remove obsolete IRQ_TYPE_PRIO parport: parport_atari: Remove obsolete IRQ_TYPE_SLOW net: atarilance: Remove obsolete IRQ_TYPE_PRIO m68k/atari: Remove obsolete keyboard_tasklet scheduling m68k/mac: Fix scsi_type for Mac LC and similar models m68k: Switch to asm-generic/futex.h m68k/mvme147: config.c - Remove unused functions m68k/atari: atakeyb.c - Remove some unused functions m68k/mvme16x: rtc - Don't use module_init in non-modular code
| * | m68k/defconfig: Enable Ethernet bridgingGeert Uytterhoeven2015-01-3112-0/+324
| | | | | | | | | | | | Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * | m68k/defconfig: Enable Atari EtherNAT and EtherNEC Ethernet supportGeert Uytterhoeven2015-01-312-1/+10
| | | | | | | | | | | | | | | | | | | | | Enable support for Atari EtherNAT (SMC91X) and EtherNEC (NE2000) Ethernet support in the Atari and multiplatform defconfig files. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * | m68k/defconfig: Enable automounting of devtmpfs at /devGeert Uytterhoeven2015-01-3112-0/+12
| | | | | | | | | | | | | | | | | | Enable CONFIG_DEVTMPFS_MOUNT, as it's useful for initrd-less kernels. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * | m68k/defconfig: Enable early printk supportGeert Uytterhoeven2015-01-318-0/+8
| | | | | | | | | | | | | | | | | | | | | Enable CONFIG_EARLY_PRINTK on all platforms where it's available (all but Sun-3) and not yet enabled. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * | m68k/defconfig: Enable test modulesGeert Uytterhoeven2015-01-3112-0/+72
| | | | | | | | | | | | | | | | | | It doesn't hurt to have CONFIG_TEST_* enabled as modules. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * | m68k/defconfig: Refresh defconfigs for v3.16-rc1--v3.19-rc2Geert Uytterhoeven2015-01-3112-144/+336
| | | | | | | | | | | | Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * | m68k/atari: Remove obsolete IRQ_TYPE_*Geert Uytterhoeven2015-01-154-11/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | IRQ_TYPE_SLOW, IRQ_TYPE_FAST, and IRQ_TYPE_PRIO are no longer used by the Atari platform interrupt code since commit 734085651c9b80aa ("[PATCH] m68k: convert atari irq code") in v2.6.18-rc1, so drop them. Note that their values have been reused for different purposes (IRQ_TYPE_NONE, IRQ_TYPE_EDGE_RISING, and IRQ_TYPE_EDGE_FALLING) since commit 6a6de9ef5850d063 ("[PATCH] genirq: core") in v2.6.18-rc1. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * | m68k/atari: Remove obsolete keyboard_tasklet schedulingGeert Uytterhoeven2015-01-131-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If CONFIG_VT=n: arch/m68k/atari/built-in.o: In function `atari_keyboard_interrupt': atakeyb.c:(.text+0x1846): undefined reference to `keyboard_tasklet' atakeyb.c:(.text+0x1852): undefined reference to `keyboard_tasklet' I think the keyboard_tasklet scheduling is no longer needed, as I believe it's handled by drivers/tty/vt/keyboard.c based on events received from the input subsystem. So just remove it. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Michael Schmitz <schmitz@debian.org>
| * | m68k/mac: Fix scsi_type for Mac LC and similar modelsFinn Thain2015-01-112-16/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Designing Cards and Drivers for the Macintosh Family, 3rd ed. on page 310 says that the I/O address space for the Mac LC is $50F0 0000 - $50FF FFFF. The developer notes for the Classic II, LC III and IIvx/IIvi give the same I/O address space. That means I've assigned the wrong platform resources to those Mac models. Fix the scsi_type initialization for the affected models, to restore the SCSI base address to its value prior to Linux 3.18. Also rename MAC_SCSI_CCL as MAC_SCSI_LC for the sake of correct chronology. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * | m68k: Switch to asm-generic/futex.hGeert Uytterhoeven2015-01-112-94/+1
| | | | | | | | | | | | | | | | | | | | | As of commit 00f634bc522dedc8 ("asm-generic: add generic futex for !CONFIG_SMP") asm-generic follows the m68k futex implementation. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * | m68k/mvme147: config.c - Remove unused functionsRickard Strandqvist2015-01-111-46/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove the function mvme147_init_console_port() that is not used anywhere. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> [geert: Also remove now unused m147_scc_write(), scc_write(), scc_delay()] Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * | m68k/atari: atakeyb.c - Remove some unused functionsRickard Strandqvist2015-01-111-66/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove some functions that are not used anywhere: atari_kbd_leds() ikbd_exec() ikbd_mem_read() ikbd_mem_write() ikbd_clock_get() ikbd_clock_set() ikbd_pause() ikbd_resume() This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * | m68k/mvme16x: rtc - Don't use module_init in non-modular codePaul Gortmaker2015-01-111-1/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The rtc.o is built for obj-y, i.e. always built in. It will never be modular, so using module_init as an alias for __initcall can be somewhat misleading. Fix this up now, so that we can relocate module_init from init.h into module.h in the future. If we don't do this, we'd have to add module.h to obviously non-modular code, and that would be a worse thing. Note that direct use of __initcall is discouraged, vs. one of the priority categorized subgroups. As __initcall gets mapped onto device_initcall, our use of device_initcall directly in this change means that the runtime impact is zero -- it will remain at level 6 in initcall ordering. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* | vm: add VM_FAULT_SIGSEGV handling supportLinus Torvalds2015-01-291-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The core VM already knows about VM_FAULT_SIGBUS, but cannot return a "you should SIGSEGV" error, because the SIGSEGV case was generally handled by the caller - usually the architecture fault handler. That results in lots of duplication - all the architecture fault handlers end up doing very similar "look up vma, check permissions, do retries etc" - but it generally works. However, there are cases where the VM actually wants to SIGSEGV, and applications _expect_ SIGSEGV. In particular, when accessing the stack guard page, libsigsegv expects a SIGSEGV. And it usually got one, because the stack growth is handled by that duplicated architecture fault handler. However, when the generic VM layer started propagating the error return from the stack expansion in commit fee7e49d4514 ("mm: propagate error from stack expansion even for guard page"), that now exposed the existing VM_FAULT_SIGBUS result to user space. And user space really expected SIGSEGV, not SIGBUS. To fix that case, we need to add a VM_FAULT_SIGSEGV, and teach all those duplicate architecture fault handlers about it. They all already have the code to handle SIGSEGV, so it's about just tying that new return value to the existing code, but it's all a bit annoying. This is the mindless minimal patch to do this. A more extensive patch would be to try to gather up the mostly shared fault handling logic into one generic helper routine, and long-term we really should do that cleanup. Just from this patch, you can generally see that most architectures just copied (directly or indirectly) the old x86 way of doing things, but in the meantime that original x86 model has been improved to hold the VM semaphore for shorter times etc and to handle VM_FAULT_RETRY and other "newer" things, so it would be a good idea to bring all those improvements to the generic case and teach other architectures about them too. Reported-and-tested-by: Takashi Iwai <tiwai@suse.de> Tested-by: Jan Engelhardt <jengelh@inai.de> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> # "s390 still compiles and boots" Cc: linux-arch@vger.kernel.org Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | m68k: Wire up execveatGeert Uytterhoeven2015-01-113-1/+3
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Check success of execveat(3, '../execveat', 0)... [OK] Check success of execveat(5, 'execveat', 0)... [OK] Check success of execveat(6, 'execveat', 0)... [OK] Check success of execveat(-100, '/root/selftest-exec/exec/execveat', 0)... [OK] Check success of execveat(99, '/root/selftest-exec/exec/execveat', 0)... [OK] Check success of execveat(8, '', 4096)... [OK] Check success of execveat(17, '', 4096)... [OK] Check success of execveat(9, '', 4096)... [OK] Check success of execveat(14, '', 4096)... [OK] Check success of execveat(14, '', 4096)... [OK] Check success of execveat(15, '', 4096)... [OK] Check failure of execveat(8, '', 0) with ENOENT... [OK] Check failure of execveat(8, '(null)', 4096) with EFAULT... [OK] Check success of execveat(5, 'execveat.symlink', 0)... [OK] Check success of execveat(6, 'execveat.symlink', 0)... [OK] Check success of execveat(-100, '/root/selftest-exec/...xec/execveat.symlink', 0)... [OK] Check success of execveat(10, '', 4096)... [OK] Check success of execveat(10, '', 4352)... [OK] Check failure of execveat(5, 'execveat.symlink', 256) with ELOOP... [OK] Check failure of execveat(6, 'execveat.symlink', 256) with ELOOP... [OK] Check failure of execveat(-100, '/root/selftest-exec/exec/execveat.symlink', 256) with ELOOP... [OK] Check success of execveat(3, '../script', 0)... [OK] Check success of execveat(5, 'script', 0)... [OK] Check success of execveat(6, 'script', 0)... [OK] Check success of execveat(-100, '/root/selftest-exec/exec/script', 0)... [OK] Check success of execveat(13, '', 4096)... [OK] Check success of execveat(13, '', 4352)... [OK] Check failure of execveat(18, '', 4096) with ENOENT... [OK] Check failure of execveat(7, 'script', 0) with ENOENT... [OK] Check success of execveat(16, '', 4096)... [OK] Check success of execveat(16, '', 4096)... [OK] Check success of execveat(4, '../script', 0)... [OK] Check success of execveat(4, 'script', 0)... [OK] Check success of execveat(4, '../script', 0)... [OK] Check failure of execveat(4, 'script', 0) with ENOENT... [OK] Check failure of execveat(5, 'execveat', 65535) with EINVAL... [OK] Check failure of execveat(5, 'no-such-file', 0) with ENOENT... [OK] Check failure of execveat(6, 'no-such-file', 0) with ENOENT... [OK] Check failure of execveat(-100, 'no-such-file', 0) with ENOENT... [OK] Check failure of execveat(5, '', 4096) with EACCES... [OK] Check failure of execveat(5, 'Makefile', 0) with EACCES... [OK] Check failure of execveat(11, '', 4096) with EACCES... [OK] Check failure of execveat(12, '', 4096) with EACCES... [OK] Check failure of execveat(99, '', 4096) with EBADF... [OK] Check failure of execveat(99, 'execveat', 0) with EBADF... [OK] Check failure of execveat(8, 'execveat', 0) with ENOTDIR... [OK] Invoke copy of 'execveat' via filename of length 4093: Check success of execveat(19, '', 4096)... [OK] Check success of execveat(5, 'xxxxxxxxxxxxxxxxxxxx...yyyyyyyyyyyyyyyyyyyy', 0)... [OK] Invoke copy of 'script' via filename of length 4093: Check success of execveat(20, '', 4096)... [OK] Check success of execveat(5, 'xxxxxxxxxxxxxxxxxxxx...yyyyyyyyyyyyyyyyyyyy', 0)... [OK] Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds2014-12-111-1/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull networking updates from David Miller: 1) New offloading infrastructure and example 'rocker' driver for offloading of switching and routing to hardware. This work was done by a large group of dedicated individuals, not limited to: Scott Feldman, Jiri Pirko, Thomas Graf, John Fastabend, Jamal Hadi Salim, Andy Gospodarek, Florian Fainelli, Roopa Prabhu 2) Start making the networking operate on IOV iterators instead of modifying iov objects in-situ during transfers. Thanks to Al Viro and Herbert Xu. 3) A set of new netlink interfaces for the TIPC stack, from Richard Alpe. 4) Remove unnecessary looping during ipv6 routing lookups, from Martin KaFai Lau. 5) Add PAUSE frame generation support to gianfar driver, from Matei Pavaluca. 6) Allow for larger reordering levels in TCP, which are easily achievable in the real world right now, from Eric Dumazet. 7) Add a variable of napi_schedule that doesn't need to disable cpu interrupts, from Eric Dumazet. 8) Use a doubly linked list to optimize neigh_parms_release(), from Nicolas Dichtel. 9) Various enhancements to the kernel BPF verifier, and allow eBPF programs to actually be attached to sockets. From Alexei Starovoitov. 10) Support TSO/LSO in sunvnet driver, from David L Stevens. 11) Allow controlling ECN usage via routing metrics, from Florian Westphal. 12) Remote checksum offload, from Tom Herbert. 13) Add split-header receive, BQL, and xmit_more support to amd-xgbe driver, from Thomas Lendacky. 14) Add MPLS support to openvswitch, from Simon Horman. 15) Support wildcard tunnel endpoints in ipv6 tunnels, from Steffen Klassert. 16) Do gro flushes on a per-device basis using a timer, from Eric Dumazet. This tries to resolve the conflicting goals between the desired handling of bulk vs. RPC-like traffic. 17) Allow userspace to ask for the CPU upon what a packet was received/steered, via SO_INCOMING_CPU. From Eric Dumazet. 18) Limit GSO packets to half the current congestion window, from Eric Dumazet. 19) Add a generic helper so that all drivers set their RSS keys in a consistent way, from Eric Dumazet. 20) Add xmit_more support to enic driver, from Govindarajulu Varadarajan. 21) Add VLAN packet scheduler action, from Jiri Pirko. 22) Support configurable RSS hash functions via ethtool, from Eyal Perry. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1820 commits) Fix race condition between vxlan_sock_add and vxlan_sock_release net/macb: fix compilation warning for print_hex_dump() called with skb->mac_header net/mlx4: Add support for A0 steering net/mlx4: Refactor QUERY_PORT net/mlx4_core: Add explicit error message when rule doesn't meet configuration net/mlx4: Add A0 hybrid steering net/mlx4: Add mlx4_bitmap zone allocator net/mlx4: Add a check if there are too many reserved QPs net/mlx4: Change QP allocation scheme net/mlx4_core: Use tasklet for user-space CQ completion events net/mlx4_core: Mask out host side virtualization features for guests net/mlx4_en: Set csum level for encapsulated packets be2net: Export tunnel offloads only when a VxLAN tunnel is created gianfar: Fix dma check map error when DMA_API_DEBUG is enabled cxgb4/csiostor: Don't use MASTER_MUST for fw_hello call net: fec: only enable mdio interrupt before phy device link up net: fec: clear all interrupt events to support i.MX6SX net: fec: reset fep link status in suspend function net: sock: fix access via invalid file descriptor net: introduce helper macro for_each_cmsghdr ...
| * net, lib: kill arch_fast_hash library bitsDaniel Borkmann2014-12-101-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As there are now no remaining users of arch_fast_hash(), lets kill it entirely. This basically reverts commit 71ae8aac3e19 ("lib: introduce arch optimized hash library") and follow-up work, that is f.e., commit 237217546d44 ("lib: hash: follow-up fixups for arch hash"), commit e3fec2f74f7f ("lib: Add missing arch generic-y entries for asm-generic/hash.h") and last but not least commit 6a02652df511 ("perf tools: Fix include for non x86 architectures"). Cc: Francesco Fusco <fusco@ntop.org> Cc: Thomas Graf <tgraf@suug.ch> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge tag 'asm-generic-for-linus' of ↵Linus Torvalds2014-12-092-4/+8
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic asm/io.h rewrite from Arnd Bergmann: "While there normally is no reason to have a pull request for asm-generic but have all changes get merged through whichever tree needs them, I do have a series for 3.19. There are two sets of patches that change significant portions of asm/io.h, and this branch contains both in order to resolve the conflicts: - Will Deacon has done a set of patches to ensure that all architectures define {read,write}{b,w,l,q}_relaxed() functions or get them by including asm-generic/io.h. These functions are commonly used on ARM specific drivers to avoid expensive L2 cache synchronization implied by the normal {read,write}{b,w,l,q}, but we need to define them on all architectures in order to share the drivers across architectures and to enable CONFIG_COMPILE_TEST configurations for them - Thierry Reding has done an unrelated set of patches that extends the asm-generic/io.h file to the degree necessary to make it useful on ARM64 and potentially other architectures" * tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (29 commits) ARM64: use GENERIC_PCI_IOMAP sparc: io: remove duplicate relaxed accessors on sparc32 ARM: sa11x0: Use void __iomem * in MMIO accessors arm64: Use include/asm-generic/io.h ARM: Use include/asm-generic/io.h asm-generic/io.h: Implement generic {read,write}s*() asm-generic/io.h: Reconcile I/O accessor overrides /dev/mem: Use more consistent data types Change xlate_dev_{kmem,mem}_ptr() prototypes ARM: ixp4xx: Properly override I/O accessors ARM: ixp4xx: Fix build with IXP4XX_INDIRECT_PCI ARM: ebsa110: Properly override I/O accessors ARC: Remove redundant PCI_IOBASE declaration documentation: memory-barriers: clarify relaxed io accessor semantics x86: io: implement dummy relaxed accessor macros for writes tile: io: implement dummy relaxed accessor macros for writes sparc: io: implement dummy relaxed accessor macros for writes powerpc: io: implement dummy relaxed accessor macros for writes parisc: io: implement dummy relaxed accessor macros for writes mn10300: io: implement dummy relaxed accessor macros for writes ...
| * | m68k: io: implement dummy relaxed accessor macros for writesWill Deacon2014-10-202-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | write{b,w,l}_relaxed are implemented by some architectures in order to permit memory-mapped I/O accesses with weaker barrier semantics than the non-relaxed variants. This patch adds dummy macros for the write accessors to m68k, in the same vein as the dummy definitions for the relaxed read accessors. Additionally, the existing relaxed read accessors are moved into asm/io.h, so that they can be used by m68k targets with an MMU. Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2014-12-091-1/+0
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k Pull m68k updates from Geert Uytterhoeven. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k/mm: Eliminate memset after alloc_bootmem_pages nubus: Remove superfluous interrupt disable/restore
| * | | m68k/mm: Eliminate memset after alloc_bootmem_pagesHimangi Saraogi2014-11-101-1/+0
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | alloc_bootmem and related functions always return a zeroed region of memory. Thus a memset after calls to these functions is unnecessary. The following Coccinelle semantic patch was used for making the change: @@ expression E,E1; @@ E = \(alloc_bootmem\|alloc_bootmem_low\|alloc_bootmem_pages\|alloc_bootmem_low_pages\)(...) ... when != E - memset(E,0,E1); Signed-off-by: Himangi Saraogi <himangi774@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
* | | sun3_scsi: Convert to platform deviceFinn Thain2014-11-201-0/+60
| | | | | | | | | | | | | | | | | | | | | | | | | | | Convert sun3_scsi to platform device and eliminate scsi_register(). Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Hannes Reinecke <hare@suse.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
* | | atari_scsi: Convert to platform deviceFinn Thain2014-11-201-0/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert atari_scsi to platform device and eliminate scsi_register(). Validate __setup options later on so that module options are checked as well. Remove the comment about the scsi mid-layer disabling the host irq as it is no longer true (AFAICT). Also remove the obsolete slow interrupt stuff (IRQ_TYPE_SLOW == 0 anyway). Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Hannes Reinecke <hare@suse.de> Tested-by: Michael Schmitz <schmitzmic@gmail.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
* | | atari_scsi: Fix atari_scsi deadlocks on FalconFinn Thain2014-11-202-23/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't disable irqs when waiting for the ST DMA "lock"; its release may require an interrupt. Introduce stdma_try_lock() for use in soft irq context. atari_scsi now tells the SCSI mid-layer to defer queueing a command if the ST DMA lock is not available, as per Michael's patch: http://marc.info/?l=linux-m68k&m=139095335824863&w=2 The falcon_got_lock variable is race prone: we can't disable IRQs while waiting to acquire the lock, so after acquiring it there must be some interval during which falcon_got_lock remains false. Introduce stdma_is_locked_by() to replace falcon_got_lock. The falcon_got_lock tests in the EH handlers are incorrect these days. It can happen that an EH handler is called after a command completes normally. Remove these checks along with falcon_got_lock. Also remove the complicated and racy fairness wait queues. If fairness is an issue (when SCSI competes with IDE for the ST DMA interrupt), the solution is likely to be a lower value for host->can_queue. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Hannes Reinecke <hare@suse.de> Tested-by: Michael Schmitz <schmitzmic@gmail.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
* | | mac_scsi: Convert to platform deviceFinn Thain2014-11-202-14/+136
| |/ |/| | | | | | | | | | | | | | | | | | | | | Convert mac_scsi to platform device and eliminate scsi_register(). Platform resources for chip registers now follow the documentation. This should fix issues with the Mac IIci (and possibly other models too). Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Hannes Reinecke <hare@suse.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
* | m68k: Wire up bpfGeert Uytterhoeven2014-10-273-1/+3
|/ | | | | Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Alexei Starovoitov <ast@plumgrid.com>
* Merge branch 'for-next' of ↵Linus Torvalds2014-10-1459-37/+40
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu Pull m68knommu update from Greg Ungerer: "The major change is to remove the arch/m68k/platform directory. The coldfire (and other non-mmu m68k platform) code is moved to the arch/m68k level, making them consistent with the traditional m68k platforms. A couple of other minor miscellaneous fixes as well" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68k: Fix typo 'COFNIG_MBAR' m68knommu: add missing ioport_map() and ioport_unmap() m68k/coldfire: remove second asm/mcfclk.h inclusion in m54xx.c m68knommu: fix size of address field for 5272 interrupt controller m68k: fix crufty 68000 and 68360 intro comments m68k: remove the unused arch/m68k/platform directory m68k: move non-mmu 68360 platform code m68k: move non-mmu 68000 platform code m68k: fix crufty ColdFire intro comments m68k: move coldfire platform code
| * m68k: Fix typo 'COFNIG_MBAR'Paul Bolle2014-09-291-1/+1
| | | | | | | | | | Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * m68knommu: add missing ioport_map() and ioport_unmap()Greg Ungerer2014-09-291-0/+9
| | | | | | | | | | | | | | Add the missing ioport_map() and ioport_unmap() functions for the non-MMU platforms. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * m68k/coldfire: remove second asm/mcfclk.h inclusion in m54xx.cFabian Frederick2014-09-291-1/+0
| | | | | | | | | | | | | | asm/mcfclk.h was included twice. Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * m68knommu: fix size of address field for 5272 interrupt controllerGreg Ungerer2014-09-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Picked up by the 0-day buidler: All warnings: >> arch/m68k/coldfire/intc-5272.c:46:20: warning: large integer implicitly truncated to unsigned type [-Woverflow] /*MCF_IRQ_EINT1*/ { .icr = MCFSIM_ICR1, .index = 28, .ack = 1, }, ... The problem stems from the changes to make all ColdFire register addresses absolute, in commit d72a5abb ("make remaining ColdFire 5272 register definitions absolute"). That change did not take into account that the addresses were stored as offsets in the irqmap of the intc-5272.c code. Make the field that now stores register addresses big enough to hold addresses. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
| * m68k: fix crufty 68000 and 68360 intro commentsGreg Ungerer2014-09-297-11/+9
| | | | | | | | | | | | | | | | | | | | Quite a few of the non-mmu specific support files have a pathname in the title comments of the file. These files have moved around a bit over the years, and most are no longer accurate. Remove the pathname and fix the comments to include at least a short description of the files contents. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * m68k: remove the unused arch/m68k/platform directoryGreg Ungerer2014-09-291-3/+0
| | | | | | | | | | | | | | | | The non-mmu platform/machine directories have been move up one level. We no longer need arch/m68k/platform, or its Makefile, so remove them. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * m68k: move non-mmu 68360 platform codeGreg Ungerer2014-09-298-2/+2
| | | | | | | | | | | | | | | | | | The non-mmu 68360 specific code is inconsistently placed under a directory named "platform". Move it to arch/m68k/ along with the other platform and board directories. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * m68k: move non-mmu 68000 platform codeGreg Ungerer2014-09-2912-2/+2
| | | | | | | | | | | | | | | | | | The non-mmu 68000 specific code is inconsistently placed under a directory named "platform". Move it to arch/m68k/ along with the other platform and machine directories. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * m68k: fix crufty ColdFire intro commentsGreg Ungerer2014-09-2913-14/+14
| | | | | | | | | | | | | | | | | | | | Quite a few of the ColdFire specific support files have a pathname in the title comments of the file. These files have moved around a bit over the years, and most are no longer accurate. Remove the pathname and fix the comments to include at least a short description of the files contents. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
| * m68k: move coldfire platform codeGreg Ungerer2014-09-2938-2/+2
| | | | | | | | | | | | | | | | | | | | Move the m68k ColdFire platform support code directory to be with the existing m68k platforms. Although the ColdFire is not a platform as such, we have always kept all its support together. No reason to change that as this time. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
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