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2016-01-10um: Use race-free temporary file creationMickaël Salaün1-0/+11
Open the memory mapped file with the O_TMPFILE flag when available. Signed-off-by: Mickaël Salaün <mic@digikod.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Acked-by: Tristan Schmelcher <tschmelcher@google.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10um: Do not set unsecure permission for temporary fileMickaël Salaün1-6/+0
Remove the insecure 0777 mode for temporary file to prohibit other users to change the executable mapped code. An attacker could gain access to the mapped file descriptor from the temporary file (before it is unlinked) in a read-only mode but it should not be accessible in write mode to avoid arbitrary code execution. To not change the hostfs behavior, the temporary file creation permission now depends on the current umask(2) and the implementation of mkstemp(3). Signed-off-by: Mickaël Salaün <mic@digikod.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Acked-by: Tristan Schmelcher <tschmelcher@google.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10um: Fix ptrace GETREGS/SETREGS bugsMickaël Salaün1-7/+0
This fix two related bugs: * PTRACE_GETREGS doesn't get the right orig_ax (syscall) value * PTRACE_SETREGS can't set the orig_ax value (erased by initial value) Get rid of the now useless and error-prone get_syscall(). Fix inconsistent behavior in the ptrace implementation for i386 when updating orig_eax automatically update the syscall number as well. This is now updated in handle_syscall(). Signed-off-by: Mickaël Salaün <mic@digikod.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kees Cook <keescook@chromium.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Will Drewry <wad@chromium.org> Cc: Thomas Meyer <thomas@m3y3r.de> Cc: Nicolas Iooss <nicolas.iooss_linux@m4x.org> Cc: Anton Ivanov <aivanov@brocade.com> Cc: Meredydd Luff <meredydd@senatehouse.org> Cc: David Drysdale <drysdale@google.com> Signed-off-by: Richard Weinberger <richard@nod.at> Acked-by: Kees Cook <keescook@chromium.org>
2016-01-10um: Update UBD to use pread/pwrite family of functionsAnton Ivanov1-0/+19
This decreases the number of syscalls per read/write by half. Signed-off-by: Anton Ivanov <aivanov@brocade.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10um: Prevent IRQ handler reentrancyAnton Ivanov1-1/+15
The existing IRQ handler design in UML does not prevent reentrancy This is mitigated by fd-enable/fd-disable semantics for the IO portion of the UML subsystem. The timer, however, can and is re-entered resulting in very deep stack usage and occasional stack exhaustion. This patch prevents this by checking if there is a timer interrupt in-flight before processing any pending timer interrupts. Signed-off-by: Anton Ivanov <aivanov@brocade.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2016-01-10uml: flush stdout before forkingVegard Nossum1-0/+2
I was seeing some really weird behaviour where piping UML's output somewhere would cause output to get duplicated: $ ./vmlinux | head -n 40 Checking that ptrace can change system call numbers...Core dump limits : soft - 0 hard - NONE OK Checking syscall emulation patch for ptrace...Core dump limits : soft - 0 hard - NONE OK Checking advanced syscall emulation patch for ptrace...Core dump limits : soft - 0 hard - NONE OK Core dump limits : soft - 0 hard - NONE This is because these tests do a fork() which duplicates the non-empty stdout buffer, then glibc flushes the duplicated buffer as each child exits. A simple workaround is to flush before forking. Cc: stable@vger.kernel.org Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-11-06um: Switch clocksource to hrtimersAnton Ivanov6-181/+168
UML is using an obsolete itimer call for all timers and "polls" for kernel space timer firing in its userspace portion resulting in a long list of bugs and incorrect behaviour(s). It also uses ITIMER_VIRTUAL for its timer which results in the timer being dependent on it running and the cpu load. This patch fixes this by moving to posix high resolution timers firing off CLOCK_MONOTONIC and relaying the timer correctly to the UML userspace. Fixes: - crashes when hosts suspends/resumes - broken userspace timers - effecive ~40Hz instead of what they should be. Note - this modifies skas behavior by no longer setting an itimer per clone(). Timer events are relayed instead. - kernel network packet scheduling disciplines - tcp behaviour especially under load - various timer related corner cases Finally, overall responsiveness of userspace is better. Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Anton Ivanov <aivanov@brocade.com> [rw: massaged commit message] Signed-off-by: Richard Weinberger <richard@nod.at>
2015-11-06um: Store syscall number after syscall_trace_enter()Richard Weinberger1-3/+7
To support changing syscall numbers we have to store it after syscall_trace_enter(). Signed-off-by: Richard Weinberger <richard@nod.at>
2015-10-19um: Fix waitpid() usage in helper codeRichard Weinberger1-3/+3
If UML is executing a helper program it is using waitpid() with the __WCLONE flag to wait for the program as the helper is executed from a clone()'ed thread. While using __WCLONE is perfectly fine for clone()'ed childs it won't detect terminated childs if the helper has issued an execve(). We have to use __WALL to wait for both clone()'ed and regular childs to detect the termination before and after an execve(). Reported-and-tested-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-06-28Merge branch 'for-linus-4.2-rc1' of ↵Linus Torvalds5-13/+16
git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml Pull UML updates from Richard Weinberger: - remove hppfs ("HonePot ProcFS") - initial support for musl libc - uaccess cleanup - random cleanups and bug fixes all over the place * 'for-linus-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: (21 commits) um: Don't pollute kernel namespace with uapi um: Include sys/types.h for makedev(), major(), minor() um: Do not use stdin and stdout identifiers for struct members um: Do not use __ptr_t type for stack_t's .ss pointer um: Fix mconsole dependency um: Handle tracehook_report_syscall_entry() result um: Remove copy&paste code from init.h um: Stop abusing __KERNEL__ um: Catch unprotected user memory access um: Fix warning in setup_signal_stack_si() um: Rework uaccess code um: Add uaccess.h to ldt.c um: Add uaccess.h to syscalls_64.c um: Add asm/elf.h to vma.c um: Cleanup mem_32/64.c headers um: Remove hppfs um: Move syscall() declaration into os.h um: kernel: ksyms: Export symbol syscall() for fixing modpost issue um/os-Linux: Use char[] for syscall_stub declarations um: Use char[] for linker script address declarations ...
2015-06-25um: Include sys/types.h for makedev(), major(), minor()Hans-Werner Hilse1-0/+1
The functions in question are not part of the POSIX standard, documentation however hints that the corresponding header shall be sys/types.h. C libraries other than glibc, namely musl, did not include that header via other ways and complained. Signed-off-by: Hans-Werner Hilse <hwhilse@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-06-25um: Do not use stdin and stdout identifiers for struct membersHans-Werner Hilse1-3/+3
stdin, stdout and stderr are macros according to C89/C99. Thus do not use them as struct member identifiers to avoid bad results from macro expansion. Signed-off-by: Hans-Werner Hilse <hwhilse@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-06-25um: Do not use __ptr_t type for stack_t's .ss pointerHans-Werner Hilse1-3/+5
__ptr_t type is a glibc-specific type, while the generally documented type is a void*. That's what other C libraries use, too. Signed-off-by: Hans-Werner Hilse <hwhilse@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-05-31um/os-Linux: Use char[] for syscall_stub declarationsNicolas Iooss2-7/+7
When declaring __syscall_stub_start, use the same type in UML userspace code as in arch/um/include/asm/sections.h. While at it, also declare batch_syscall_stub as char[]. Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-05-24um,ethertap: use strncpyAlan1-1/+1
[um maintainers appear to be vanished] I can't prove the case pointed out in https://bugzilla.kernel.org/show_bug.cgi?id=82341 is correct so let us play safe. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-13um: Move uml_postsetup in the init_thread stackThomas Meyer1-1/+1
atomic_notifier_chain_register() and uml_postsetup() do call kernel code that rely on the "current" kernel macro and a valid task_struct resp. thread_info struct. Give those functions a valid stack by moving uml_postsetup() in the init_thread stack. This moves enables a panic() call in this early code to generate a valid stacktrace, instead of crashing. E.g. when an UML kernel is started with an initrd but too few physical memory the panic() call get's actually processed. Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Richard Weinberger <richard@nod.at>
2015-04-13um: Remove SKAS3/4 supportRichard Weinberger4-408/+62
Before we had SKAS0 UML had two modes of operation TT (tracing thread) and SKAS3/4 (separated kernel address space). TT was known to be insecure and got removed a long time ago. SKAS3/4 required a few (3 or 4) patches on the host side which never went mainline. The last host patch is 10 years old. With SKAS0 mode (separated kernel address space using 0 host patches), default since 2005, SKAS3/4 is obsolete and can be removed. Signed-off-by: Richard Weinberger <richard@nod.at>
2014-07-20Revert "um: Fix wait_stub_done() error handling"Richard Weinberger1-7/+2
This reverts commit 0974a9cadc7886f7baaa458bb0c89f5c5f9d458e. The real for for that issue is to release current->mm->mmap_sem in fix_range_common(). Signed-off-by: Richard Weinberger <richard@nod.at>
2014-04-20um: Memory corruption on startupAnton Ivanov1-0/+6
The reverse case of this race (you must msync before read) is well known. This is the not so common one. It can be triggered only on systems which do a lot of task switching and only at UML startup. If you are starting 200+ UMLs ~ 0.5% will always die without this fix. Signed-off-by: Anton Ivanov <antivano@cisco.com> [rw: minor whitespace fixes] Signed-off-by: Richard Weinberger <richard@nod.at>
2014-04-20um: Missing pipe handlingAnton Ivanov1-0/+1
UML does not handle sigpipe. As a result when running it under expect or redirecting the IO from the console to an external program it will crash if the program stops or exits. Signed-off-by: Anton Ivanov <antivano@cisco.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2014-04-20uml: Simplify tempdir logic.Tristan Schmelcher1-297/+75
Inferring the mount hierarchy correctly from /proc/mounts is hard when MS_MOVE may have been used, and the previous code did it wrongly. This change simplifies the logic to only require that /dev/shm be _on_ tmpfs (which can be checked trivially with statfs) rather than that it be a _mountpoint_ of tmpfs, since there isn't a compelling reason to be that strict. We also now check for tmpfs on whatever directory we ultimately use so that the user is better informed. This change also moves the more standard TMPDIR environment variable check ahead of the others. Applies to 3.12. Signed-off-by: Tristan Schmelcher <tschmelcher@google.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2013-11-17um: Make stack trace reliable against kernel mode faultsRichard Weinberger1-0/+8
As UML uses an alternative signal stack we cannot use the current stack pointer for stack dumping if UML itself dies by SIGSEGV. To bypass this issue we save regs taken from mcontext in our segv handler into thread_struct and use these regs to obtain the stack pointer in show_stack(). Signed-off-by: Richard Weinberger <richard@nod.at>
2013-09-07um: Run UML in it's own session.Richard Weinberger1-0/+2
If UML is not run by a shell it can happen that UML will kill unrelated proceses upon a fatal exit because it issues a kill(0, ...). To prevent such oddities we create a new session in main(). Reported-and-tested-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2013-09-07um: Cleanup SIGTERM handlingRichard Weinberger4-5/+13
Richard reported that some UML processes survive if the UML main process receives a SIGTERM. This issue was caused by a wrongly placed signal(SIGTERM, SIG_DFL) in init_new_thread_signals(). It disabled the UML exit handler accidently for some processes. The correct solution is to disable the fatal handler for all UML helper threads/processes. Such that last_ditch_exit() does not get called multiple times and all processes can exit due to SIGTERM. Reported-and-tested-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2013-09-07um: ubd: Add REQ_FLUSH suppportRichard Weinberger1-0/+9
UML's block device driver does not support write barriers, to support this this patch adds REQ_FLUSH suppport. Every time the block layer sends a REQ_FLUSH we fsync() now our backing file to guarantee data consistency. Reported-and-tested-by: Richard W.M. Jones <rjones@redhat.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2013-09-07um: Implement probe_kernel_read()Richard Weinberger1-0/+52
UML needs it's own probe_kernel_read() to handle kernel mode faults correctly. The implementation uses mincore() on the host side to detect whether a page is owned by the UML kernel process. This fixes also a possible crash when sysrq-t is used. Starting with 3.10 sysrq-t calls probe_kernel_read() to read details from the kernel workers. As kernel worker are completely async pointers may turn NULL while reading them. Cc: <stian@nixia.no> Cc: <tj@kernel.org> Cc: <stable@vger.kernel.org> # 3.10.x Signed-off-by: Richard Weinberger <richard@nod.at>
2013-07-19um: siginfo cleanupRichard Weinberger2-9/+9
Currently we use both struct siginfo and siginfo_t. Let's use struct siginfo internally to avoid ongoing compiler warning. We are allowed to do so because struct siginfo and siginfo_t are equivalent. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-07-19uml: Fix which_tmpdir failure when /dev/shm is a symlink, and in other edge ↵Tristan Schmelcher1-41/+189
cases which_tmpdir did the wrong thing if /dev/shm was a symlink (e.g., to /run/shm), if there were multiple mounts on top of each other, if the mount(s) were obscured by a later mount, or if /dev/shm was a prefix of another mount point. This fixes these cases. Applies to 3.9.6. Signed-off-by: Tristan Schmelcher <tschmelcher@google.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2013-07-19um: Fix wait_stub_done() error handlingRichard Weinberger1-2/+7
If we die within a stub handler we only way to reliable kill the (obviously) dying uml guest process is killing it's host twin on the host side. Signed-off-by: Richard Weinberger <richard@nod.at>
2013-05-02Merge commit '8700c95adb03' into timers/nohzFrederic Weisbecker2-1/+3
The full dynticks tree needs the latest RCU and sched upstream updates in order to fix some dependencies. Merge a common upstream merge point that has these updates. Conflicts: include/linux/perf_event.h kernel/rcutree.h kernel/rcutree_plugin.h Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2013-04-03nohz: Rename CONFIG_NO_HZ to CONFIG_NO_HZ_COMMONFrederic Weisbecker1-1/+1
We are planning to convert the dynticks Kconfig options layout into a choice menu. The user must be able to easily pick any of the following implementations: constant periodic tick, idle dynticks, full dynticks. As this implies a mutual exclusion, the two dynticks implementions need to converge on the selection of a common Kconfig option in order to ease the sharing of a common infrastructure. It would thus seem pretty natural to reuse CONFIG_NO_HZ to that end. It already implements all the idle dynticks code and the full dynticks depends on all that code for now. So ideally the choice menu would propose CONFIG_NO_HZ_IDLE and CONFIG_NO_HZ_EXTENDED then both would select CONFIG_NO_HZ. On the other hand we want to stay backward compatible: if CONFIG_NO_HZ is set in an older config file, we want to enable CONFIG_NO_HZ_IDLE by default. But we can't afford both at the same time or we run into a circular dependency: 1) CONFIG_NO_HZ_IDLE and CONFIG_NO_HZ_EXTENDED both select CONFIG_NO_HZ 2) If CONFIG_NO_HZ is set, we default to CONFIG_NO_HZ_IDLE We might be able to support that from Kconfig/Kbuild but it may not be wise to introduce such a confusing behaviour. So to solve this, create a new CONFIG_NO_HZ_COMMON option which gathers the common code between idle and full dynticks (that common code for now is simply the idle dynticks code) and select it from their referring Kconfig. Then we'll later create CONFIG_NO_HZ_IDLE and map CONFIG_NO_HZ to it for backward compatibility. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Christoph Lameter <cl@linux.com> Cc: Geoff Levand <geoff@infradead.org> Cc: Gilad Ben Yossef <gilad@benyossef.com> Cc: Hakan Akkan <hakanakkan@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Kevin Hilman <khilman@linaro.org> Cc: Li Zhong <zhong@linux.vnet.ibm.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de>
2013-03-11um: fix build failure due to mess-up of sig_info protorypeSergei Trofimovich1-1/+1
arch/um/os-Linux/signal.c:18:8: error: conflicting types for 'sig_info' In file included from /home/slyfox/linux-2.6/arch/um/os-Linux/signal.c:12:0: arch/um/include/shared/as-layout.h:64:15: note: previous declaration of 'sig_info' was here Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> CC: Jeff Dike <jdike@addtoit.com> CC: Richard Weinberger <richard@nod.at> CC: "Martin Pärtel" <martin.partel@gmail.com> CC: Al Viro <viro@zeniv.linux.org.uk> CC: user-mode-linux-devel@lists.sourceforge.net CC: user-mode-linux-user@lists.sourceforge.net CC: linux-kernel@vger.kernel.org Signed-off-by: Richard Weinberger <richard@nod.at>
2013-03-11um: add missing declaration of 'getrlimit()' and friendsSergei Trofimovich1-0/+2
arch/um/os-Linux/start_up.c: In function 'check_coredump_limit': arch/um/os-Linux/start_up.c:338:16: error: storage size of 'lim' isn't known arch/um/os-Linux/start_up.c:339:2: error: implicit declaration of function 'getrlimit' [-Werror=implicit-function-declaration] Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> CC: Jeff Dike <jdike@addtoit.com> CC: Richard Weinberger <richard@nod.at> CC: Al Viro <viro@zeniv.linux.org.uk> CC: user-mode-linux-devel@lists.sourceforge.net CC: user-mode-linux-user@lists.sourceforge.net CC: linux-kernel@vger.kernel.org Signed-off-by: Richard Weinberger <richard@nod.at>
2012-10-13Merge branch 'for-linus' of ↵Linus Torvalds1-13/+0
git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal Pull third pile of kernel_execve() patches from Al Viro: "The last bits of infrastructure for kernel_thread() et.al., with alpha/arm/x86 use of those. Plus sanitizing the asm glue and do_notify_resume() on alpha, fixing the "disabled irq while running task_work stuff" breakage there. At that point the rest of kernel_thread/kernel_execve/sys_execve work can be done independently for different architectures. The only pending bits that do depend on having all architectures converted are restrictred to fs/* and kernel/* - that'll obviously have to wait for the next cycle. I thought we'd have to wait for all of them done before we start eliminating the longjump-style insanity in kernel_execve(), but it turned out there's a very simple way to do that without flagday-style changes." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: alpha: switch to saner kernel_execve() semantics arm: switch to saner kernel_execve() semantics x86, um: convert to saner kernel_execve() semantics infrastructure for saner ret_from_kernel_thread semantics make sure that kernel_thread() callbacks call do_exit() themselves make sure that we always have a return path from kernel_execve() ppc: eeh_event should just use kthread_run() don't bother with kernel_thread/kernel_execve for launching linuxrc alpha: get rid of switch_stack argument of do_work_pending() alpha: don't bother passing switch_stack separately from regs alpha: take SIGPENDING/NOTIFY_RESUME loop into signal.c alpha: simplify TIF_NEED_RESCHED handling
2012-10-12x86, um: convert to saner kernel_execve() semanticsAl Viro1-13/+0
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-09um: get rid of pointless include "..." where include <...> will doAl Viro26-85/+85
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2012-09-05uml: fix compile error in deliver_alarm()Miklos Szeredi1-1/+1
Fix the following compile error on UML. arch/um/os-Linux/time.c: In function 'deliver_alarm': arch/um/os-Linux/time.c:117:3: error: too few arguments to function 'alarm_handler' arch/um/os-Linux/internal.h:1:6: note: declared here The error was introduced by commit d3c1cfcd ("um: pass siginfo to guest process") in 3.6-rc1. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: Martin Pärtel <martin.partel@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-08-02um: pass siginfo to guest processMartin Pärtel4-17/+26
UML guest processes now get correct siginfo_t for SIGTRAP, SIGFPE, SIGILL and SIGBUS. Specifically, si_addr and si_code are now correct where previously they were si_addr = NULL and si_code = 128. Signed-off-by: Martin Pärtel <martin.partel@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
2012-08-02um: pull interrupt_end() into userspace()Al Viro1-0/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2012-05-21um: Remove unused variablesRichard Weinberger1-10/+0
Signed-off-by: Richard Weinberger <richard@nod.at>
2012-03-25um: use the right ifdef around exports in user_syms.cAl Viro2-3/+1
... the same one that controls whether elf_aux.o is included into the build, bringing the vsyscall_e... into it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2011-11-02um: unify ptrace_user.hAl Viro2-7/+5
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2011-11-02um: merge os-Linux/tls.c into arch/x86/um/os-Linux/tls.cAl Viro2-37/+2
it's i386-specific; moreover, analogs on other targets have incompatible interface - PTRACE_GET_THREAD_AREA does exist elsewhere, but struct user_desc does *not* Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2011-11-02um: take chan_*.h and line.h to arch/um/driversAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2011-11-02um: take register_winch_irq() into the caller of is_skas_winch()Al Viro1-5/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2011-11-02um: take arch/um/sys-x86 to arch/x86/umAl Viro7-353/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2011-11-02um: sysdep/barrier.h is not used for anythingAl Viro1-1/+0
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2011-11-02um: shared/process.h is empty now; kill itAl Viro5-5/+0
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2011-11-02um: finish conversion to mcontext_tAl Viro3-4/+35
now we don't mix host and guest signal frame layouts anymore; moreover, we don't need host's struct sigcontext at all. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
2011-11-02um: start switching the references to host mcontext_t to its userland typeAl Viro3-20/+18
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
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