kernel.git/arch/x86/um, branch linux-3.17.y

Merge branch 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc

2014-08-09T16:58:12Z

Pull arch signal handling cleanup from Richard Weinberger: "This patch series moves all remaining archs to the get_signal(), signal_setup_done() and sigsp() functions. Currently these archs use open coded variants of the said functions. Further, unused parameters get removed from get_signal_to_deliver(), tracehook_signal_handler() and signal_delivered(). At the end of the day we save around 500 lines of code." * 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (43 commits) powerpc: Use sigsp() openrisc: Use sigsp() mn10300: Use sigsp() mips: Use sigsp() microblaze: Use sigsp() metag: Use sigsp() m68k: Use sigsp() m32r: Use sigsp() hexagon: Use sigsp() frv: Use sigsp() cris: Use sigsp() c6x: Use sigsp() blackfin: Use sigsp() avr32: Use sigsp() arm64: Use sigsp() arc: Use sigsp() sas_ss_flags: Remove nested ternary if Rip out get_signal_to_deliver() Clean up signal_delivered() tracehook_signal_handler: Remove sig, info, ka and regs ...

arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area

2014-08-08T22:57:27Z

The core mm code will provide a default gate area based on FIXADDR_USER_START and FIXADDR_USER_END if !defined(__HAVE_ARCH_GATE_AREA) && defined(AT_SYSINFO_EHDR). This default is only useful for ia64. arm64, ppc, s390, sh, tile, 64-bit UML, and x86_32 have their own code just to disable it. arm, 32-bit UML, and x86_64 have gate areas, but they have their own implementations. This gets rid of the default and moves the code into ia64. This should save some code on architectures without a gate area: it's now possible to inline the gate_area functions in the default case. Signed-off-by: Andy Lutomirski Acked-by: Nathan Lynch Acked-by: H. Peter Anvin Acked-by: Benjamin Herrenschmidt [in principle] Acked-by: Richard Weinberger [for um] Acked-by: Will Deacon [for arm64] Cc: Catalin Marinas Cc: Will Deacon Cc: Tony Luck Cc: Fenghua Yu Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: Chris Metcalf Cc: Jeff Dike Cc: Richard Weinberger Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Nathan Lynch Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

um: Use get_signal() signal_setup_done()

2014-08-06T11:03:41Z

Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger

arch, locking: Ciao arch_mutex_cpu_relax()

2014-07-17T10:32:47Z

The arch_mutex_cpu_relax() function, introduced by 34b133f, is hacky and ugly. It was added a few years ago to address the fact that common cpu_relax() calls include yielding on s390, and thus impact the optimistic spinning functionality of mutexes. Nowadays we use this function well beyond mutexes: rwsem, qrwlock, mcs and lockref. Since the macro that defines the call is in the mutex header, any users must include mutex.h and the naming is misleading as well. This patch (i) renames the call to cpu_relax_lowlatency ("relax, but only if you can do it with very low latency") and (ii) defines it in each arch's asm/processor.h local header, just like for regular cpu_relax functions. On all archs, except s390, cpu_relax_lowlatency is simply cpu_relax, and thus we can take it out of mutex.h. While this can seem redundant, I believe it is a good choice as it allows us to move out arch specific logic from generic locking primitives and enables future(?) archs to transparently define it, similarly to System Z. Signed-off-by: Davidlohr Bueso Signed-off-by: Peter Zijlstra Cc: Andrew Morton Cc: Anton Blanchard Cc: Aurelien Jacquiot Cc: Benjamin Herrenschmidt Cc: Bharat Bhushan Cc: Catalin Marinas Cc: Chen Liqin Cc: Chris Metcalf Cc: Christian Borntraeger Cc: Chris Zankel Cc: David Howells Cc: David S. Miller Cc: Deepthi Dharwar Cc: Dominik Dingel Cc: Fenghua Yu Cc: Geert Uytterhoeven Cc: Guan Xuetao Cc: Haavard Skinnemoen Cc: Hans-Christian Egtvedt Cc: Heiko Carstens Cc: Helge Deller Cc: Hirokazu Takata Cc: Ivan Kokshaysky Cc: James E.J. Bottomley Cc: James Hogan Cc: Jason Wang Cc: Jesper Nilsson Cc: Joe Perches Cc: Jonas Bonn Cc: Joseph Myers Cc: Kees Cook Cc: Koichi Yasutake Cc: Lennox Wu Cc: Linus Torvalds Cc: Mark Salter Cc: Martin Schwidefsky Cc: Matt Turner Cc: Max Filippov Cc: Michael Neuling Cc: Michal Simek Cc: Mikael Starvik Cc: Nicolas Pitre Cc: Paolo Bonzini Cc: Paul Burton Cc: Paul E. McKenney Cc: Paul Gortmaker Cc: Paul Mackerras Cc: Qais Yousef Cc: Qiaowei Ren Cc: Rafael Wysocki Cc: Ralf Baechle Cc: Richard Henderson Cc: Richard Kuo Cc: Russell King Cc: Steven Miao Cc: Steven Rostedt Cc: Stratos Karafotis Cc: Tim Chen Cc: Tony Luck Cc: Vasily Kulikov Cc: Vineet Gupta Cc: Vineet Gupta Cc: Waiman Long Cc: Will Deacon Cc: Wolfram Sang Cc: adi-buildroot-devel@lists.sourceforge.net Cc: linux390@de.ibm.com Cc: linux-alpha@vger.kernel.org Cc: linux-am33-list@redhat.com Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-cris-kernel@axis.com Cc: linux-hexagon@vger.kernel.org Cc: linux-ia64@vger.kernel.org Cc: linux@lists.openrisc.net Cc: linux-m32r-ja@ml.linux-m32r.org Cc: linux-m32r@ml.linux-m32r.org Cc: linux-m68k@lists.linux-m68k.org Cc: linux-metag@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: linux-xtensa@linux-xtensa.org Cc: sparclinux@vger.kernel.org Link: http://lkml.kernel.org/r/1404079773.2619.4.camel@buesod1.americas.hpqcorp.net Signed-off-by: Ingo Molnar

x86, vdso: Clean up 32-bit vs 64-bit vdso params

2014-05-05T20:18:40Z

Rather than using 'vdso_enabled' and an awful #define, just call the parameters vdso32_enabled and vdso64_enabled. Signed-off-by: Andy Lutomirski Link: http://lkml.kernel.org/r/87913de56bdcbae3d93917938302fc369b05caee.1399317206.git.luto@amacapital.net Signed-off-by: H. Peter Anvin

x86: Remove CONFIG_X86_OOSTORE

2014-03-11T17:16:18Z

This was an optimization that made memcpy type benchmarks a little faster on ancient (Circa 1998) IDT Winchip CPUs. In real-life workloads, it wasn't even noticable, and I doubt anyone is running benchmarks on 16 year old silicon any more. Given this code has likely seen very little use over the last decade, let's just remove it. Signed-off-by: Dave Jones Signed-off-by: Linus Torvalds

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

2013-11-19T19:42:32Z

Pull UML changes from Richard Weinberger: "This pile contains a nice defconfig cleanup, a rewritten stack unwinder and various cleanups" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: um: Remove unused declarations from um: remove used STDIO_CONSOLE Kconfig param um/vdso: add .gitignore for a couple of targets arch/um: make it work with defconfig and x86_64 um: Make kstack_depth_to_print conform to arch/x86 um: Get rid of thread_struct->saved_task um: Make stack trace reliable against kernel mode faults um: Rewrite show_stack()

um/vdso: add .gitignore for a couple of targets

2013-11-17T10:32:07Z

Cc: Richard Weinberger Signed-off-by: Ramkumar Ramachandra Signed-off-by: Richard Weinberger

arch/um: make it work with defconfig and x86_64

2013-11-17T10:31:48Z

arch/um/defconfig only lists one default configuration, and that applies only to the i386 architecture. Replace it with two minimal configuration files generated using `make savedefconfig`: i386_defconfig and x86_64_defconfig The build scripts now require two updates: 1. um's Kconfig (arch/x86/um/Kconfig) should specify an ARCH_DEFCONFIG section explicitly pointing to these scripts if the required variables are set. Take care to remove the DEFCONFIG_LIST section defined in the included file arch/um/Kconfig.common. 2. um's Makefile (arch/um/Makefile) should set KBUILD_DEFCONFIG properly for the top-level Makefile to pick up. Copy the logic in arch/x86/Makefile to properly pick the defconfig file depending on the actual architecture; except we're working with $SUBARCH here, instead of $ARCH. Now, you can do: $ ARCH=um make defconfig $ ARCH=um make and successfully build User-Mode Linux on an x86_64 box in default configuration. Cc: Richard Weinberger Cc: Jeff Dike Signed-off-by: Ramkumar Ramachandra Signed-off-by: Richard Weinberger

um: Rewrite show_stack()

2013-11-17T10:27:25Z

Currently on UML stack traces are not very reliable and both x86 and x86_64 have their on implementations. This patch unifies both and adds support to outline unreliable functions calls. Signed-off-by: Richard Weinberger