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* [PATCH] x86: SMP alternativesGerd Hoffmann2006-03-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement SMP alternatives, i.e. switching at runtime between different code versions for UP and SMP. The code can patch both SMP->UP and UP->SMP. The UP->SMP case is useful for CPU hotplug. With CONFIG_CPU_HOTPLUG enabled the code switches to UP at boot time and when the number of CPUs goes down to 1, and switches to SMP when the number of CPUs goes up to 2. Without CONFIG_CPU_HOTPLUG or on non-SMP-capable systems the code is patched once at boot time (if needed) and the tables are released afterwards. The changes in detail: * The current alternatives bits are moved to a separate file, the SMP alternatives code is added there. * The patch adds some new elf sections to the kernel: .smp_altinstructions like .altinstructions, also contains a list of alt_instr structs. .smp_altinstr_replacement like .altinstr_replacement, but also has some space to save original instruction before replaving it. .smp_locks list of pointers to lock prefixes which can be nop'ed out on UP. The first two are used to replace more complex instruction sequences such as spinlocks and semaphores. It would be possible to deal with the lock prefixes with that as well, but by handling them as special case the table sizes become much smaller. * The sections are page-aligned and padded up to page size, so they can be free if they are not needed. * Splitted the code to release init pages to a separate function and use it to release the elf sections if they are unused. Signed-off-by: Gerd Hoffmann <kraxel@suse.de> Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] remove set_page_count() outside mm/Nick Piggin2006-03-22
| | | | | | | | | | | | | set_page_count usage outside mm/ is limited to setting the refcount to 1. Remove set_page_count from outside mm/, and replace those users with init_page_count() and set_page_refcounted(). This allows more debug checking, and tighter control on how code is allowed to play around with page->_count. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] remove set_page_count(page, 0) users (outside mm)Nick Piggin2006-03-22
| | | | | | | | | | | A couple of places set_page_count(page, 1) that don't need to. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: tidying COW codePaolo 'Blaisorblade' Giarrusso2006-02-24
| | | | | | | | | | | Improve (especially for coherence) some prototypes, and return code of init_cow_file in error case - for a short write return -EINVAL, otherwise return the error we got! Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: better error reporting for read_outputPaolo 'Blaisorblade' Giarrusso2006-02-24
| | | | | | | | | | | Do precise error handling: print precise error messages, distinguishing short reads and read errors. This functions fails frequently enough for me so I bothered doing this fix. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: os_connect_socket error path fixupPaolo 'Blaisorblade' Giarrusso2006-02-24
| | | | | | | | | | Fix an fd leak and a return of -1 instead of -errno in the error path - this showed up in intensive testing of HPPFS, the os_connect_socket user. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: fix ((unused)) attributePaolo 'Blaisorblade' Giarrusso2006-02-24
| | | | | | | | | | Use __attribute_used__ instead of __attribute__ ((unused)). This will help with GCC > 3.2. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: fix usage of kernel_errno in place of errnoPaolo 'Blaisorblade' Giarrusso2006-02-24
| | | | | | | | | | | | To avoid conflicts, in kernel files errno is expanded to kernel_errno, to distinguish it from glibc errno. In this case, the code wants to use the libc errno but the kernel one is used; in the other usage, we return errno in place of -errno in case of an error. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: correct error messages in COW driverPaolo 'Blaisorblade' Giarrusso2006-02-24
| | | | | | | | | | | Improve some error messages in the COW driver, and say V3, not V2, when talking about V3 format. Also resync with our userspace code utility a bit more. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: remove a dead fileJeff Dike2006-02-07
| | | | | | | | | | A previous patch removed a file from the build without removing it from the tree. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: initialize process FP registers properlyJeff Dike2006-02-07
| | | | | | | | | | | | | We weren't making sure that we initialized the FP registers of new processes to sane values. This patch also moves some defines in the affected area closer to where they are used. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: block SIGWINCH in ptrace tester childJeff Dike2006-02-07
| | | | | | | | | | | The process that UML uses to probe the host's ptrace capabilities can (rarely) receive a SIGWINCH, confusing the parent. This fixes that by blocking SIGWINCH. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: balance list_add and list_del in the network driverJeff Dike2006-02-07
| | | | | | | | | | | | | The network driver added an interface to the "opened" list when it was configured, not when it was brought up, and removed it when it was taken down. A sequence of ifconfig up, ifconfig down, ... caused it to be removed multiple times from the list without being added in between, resulting in a crash. This patch moves the add to when the interface is brought up. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: close TUN/TAP file descriptorsJeff Dike2006-02-07
| | | | | | | | | | | | | | When UML opens a TUN/TAP device, the file descriptor could be copied into later, long-lived threads, holding the device open even after the interface is taken down, preventing it from being brought up again. This patch makes these descriptors close-on-exec so that they disappear from helper processes, and adds CLONE_FILES to a UML helper thread so that the descriptors are closed in the thread when they are closed elsewhere in UML. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: add debug switch for skas modeJeff Dike2006-02-07
| | | | | | | | | | | | It doesn't do anything but emit a warning, but there's a user population that's used to adding 'debug' to the UML command line in order to gdb it. With skas0 mode, that's not necessary, but these users need some indication that 'debug' doesn't do what they want. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: avoid "CONFIG_NR_CPUS undeclared" bogus error messagesPaolo 'Blaisorblade' Giarrusso2006-02-01
| | | | | | | | | | | | | | | | | Olaf Hering <olh@suse.de> Olaf reported UML doesn't build for him with a clear analisys of what happened - we're using NR_CPUS in files linked against glibc headers. Seems like it defines CONFIG_SMP but not CONFIG_NR_CPUS, so we get CONFIG_NR_CPUS undeclared. The fix is to move the declaration away from that header file and move it in asm-um headers, and to add that header where needed. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: some harmless sparse warning fixesPaolo 'Blaisorblade' Giarrusso2006-02-01
| | | | | | | | | | Fix some simple sparse warnings - a lot more staticness and a misplaced __user. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: TT - SYSCALL_DEBUG - fix buglet introduced in cleanupPaolo 'Blaisorblade' Giarrusso2006-02-01
| | | | | | | | | | | | | | Fixes a bug introduced in commit e32dacb9f481fd6decb41adb28e720c923d34f54 - index is initialized based on syscall before syscall is calculated. I'm bothering with this mainly because it gives a correct warning when the config option is enabled, even if the code is for a almost unused debugging option. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: fix "apples/bananas" typoPaolo 'Blaisorblade' Giarrusso2006-02-01
| | | | | | | | | Fix stupid typo. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: fix hugest stack usersPaolo 'Blaisorblade' Giarrusso2006-02-01
| | | | | | | | | | | | | | The C99 initialization, with GCC's bad handling, for 6K wide structs (which _aren't_ on the stack), is causing GCC to use 12K for these silly procs with 3 vars. Workaround this. Note that .name = { '\0' } translates to memset(->name, 0, '->name' size) - I verified this with GCC's docs and a testprogram. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: comments about libc-conflict guardsPaolo 'Blaisorblade' Giarrusso2006-02-01
| | | | | | | | | | While fixing myself the mktime conflict (which someone already merged), I also improved a few comments. Merge them up. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: fix some typosJeff Dike2006-02-01
| | | | | | | | Fix a couple of typos. Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: add a build dependencyJeff Dike2006-02-01
| | | | | | | | | kern_constants.h now depends on arch/um/include to make sure it exists before we try to create symlinks in it. Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: compilation fix when MODE_SKAS disabledPekka Enberg2006-02-01
| | | | | | | | | | | CC arch/um/sys-i386/ldt.o arch/um/sys-i386/ldt.c:19:21: proc_mm.h: No such file or directory make[1]: *** [arch/um/sys-i386/ldt.o] Error 1 Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: use generic sys_rt_sigsuspendJeff Dike2006-01-18
| | | | | | | | Use the generic sys_rt_sigsuspend. Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: add TIF_RESTORE_SIGMASK supportJeff Dike2006-01-18
| | | | | | | | | | | | Add support for TIF_RESTORE_SIGMASK. I copy the i386 handling of the flag. sys_sigsuspend is also changed to follow i386. Also a bit of cleanup - turn an if into a switch get rid of a couple more emacs formatting comments Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml ubd code: fix a bit of whitespacePaolo 'Blaisorblade' Giarrusso2006-01-18
| | | | | | | | | Correct a bit of whitespace problems while working here. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: allow again to move backing file and to override saved locationPaolo 'Blaisorblade' Giarrusso2006-01-18
| | | | | | | | | | | | | | | | | | | | | When the user specifies both a COW file and its backing file, if the previous backing file is not found, currently UML tries again to use it and fails. This can be corrected by changing same_backing_files() return value in that case, so that the caller will try to change the COW file to point to the new location, as already done in other cases. Additionally, given the change in the meaning of the func, change its name, invert its return value, so all values are inverted except when stat(from_cow,&buf2) fails. And add some comments and two minor bugfixes - remove a fd leak (return err rather than goto out) and a repeated check. Tested well. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: arch Kconfig menu cleanupsPaolo 'Blaisorblade' Giarrusso2006-01-18
| | | | | | | | | | | | | | | | | | | | | | | *) mark as "EXPERIMENTAL" various items that either aren't very stable or that are actively crashing the setup of users which don't really need them (i.e. HIGHMEM and 3-level pagetables on x86 - nobody needs either, everybody reports "I'm using it and getting trouble"). *) move net/Kconfig near to the rest of network configurations, and drivers/block/Kconfig near "Block layer" submenu. *) it's useless and doesn't work well to force NETDEVICES on and to disable the prompt like it's done. Better remove the attempt, and change that to a simple "default y if UML". *) drop the warning about "report problems about HPPFS" - it's redundant anyway, as that's the usual procedure, and HPPFS users are especially technical (i.e. they know reporting bugs is _good_). Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: avoid malloc to sleep in atomic sectionsPaolo 'Blaisorblade' Giarrusso2006-01-18
| | | | | | | | | | | | | | Ugly trick to help make malloc not sleeping - we can't do anything else. But this is not yet optimal, since spinlock don't trigger in_atomic() when preemption is disabled. Also, even if ugly, this was already used in one place, and was even more bogus. Fix it. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: sigio code - reduce spinlock hold timePaolo 'Blaisorblade' Giarrusso2006-01-18
| | | | | | | | | | | | | | | | | | In a previous patch I shifted an allocation to being atomic. In this patch, a better but more intrusive solution is implemented, i.e. hold the lock only when really needing it, especially not over pipe operations, nor over the culprit allocation. Additionally, while at it, add a missing kfree in the failure path, and make sure that if we fail in forking, write_sigio_pid is -1 and not, say, -ENOMEM. And fix whitespace, at least for things I was touching anyway. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: fix spinlock recursion and sleep-inside-spinlock in error pathPaolo 'Blaisorblade' Giarrusso2006-01-18
| | | | | | | | | | | | | | | | | | | | | | | | | | In this error path, when the interface has had a problem, we call dev_close(), which is disallowed for two reasons: *) takes again the UML internal spinlock, inside the ->stop method of this device *) can be called in process context only, while we're in interrupt context. I've also thought that calling dev_close() may be a wrong policy to follow, but it's not up to me to decide that. However, we may end up with multiple dev_close() queued on the same device. But the initial test for (dev->flags & IFF_UP) makes this harmless, though - and dev_close() is supposed to care about races with itself. So there's no harm in delaying the shutdown, IMHO. Something to mark the interface as "going to shutdown" would be appreciated, but dev_deactivate has the same problems as dev_close(), so we can't use it either. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: networking - clear transport-specific structurePaolo 'Blaisorblade' Giarrusso2006-01-18
| | | | | | | | | | | | | | | | | Pre-clear transport-specific private structure before passing it down. In fact, I just got a slab corruption and kernel panic on exit because kfree() was called on a pointer which probably was never allocated, BUT hadn't been set to NULL by the driver. As the code is full of such errors, I've decided for now to go the safe way (we're talking about drivers), and to do the simple thing. I'm also starting to fix drivers, and already sent a patch for the daemon transport. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: make daemon transport behave properlyPaolo 'Blaisorblade' Giarrusso2006-01-18
| | | | | | | | | | | | Avoid uninitialized data in the daemon_data structure. I used this transport before doing proper setup before-hand, and I got some very nice SLAB corruption due to freeing crap pointers. So just make sure to clear everything when appropriate. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: TT mode softint fixesBodo Stroesser2006-01-18
| | | | | | | | | Some fixes to make softints work in tt mode. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: use setjmp/longjmp instead of sigsetjmp/siglongjmpJeff Dike2006-01-18
| | | | | | | | | | Now that we are doing soft interrupts, there's no point in using sigsetjmp and siglongjmp. Using setjmp and longjmp saves a sigprocmask on every jump. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: implement soft interruptsJeff Dike2006-01-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements soft interrupts. Interrupt enabling and disabling no longer map to sigprocmask. Rather, a flag is set indicating whether interrupts may be handled. If a signal comes in and interrupts are marked as OK, then it is handled normally. If interrupts are marked as off, then the signal handler simply returns after noting that a signal needs handling. When interrupts are enabled later on, this pending signals flag is checked, and the IRQ handlers are called at that point. The point of this is to reduce the cost of local_irq_save et al, since they are very much more common than the signals that they are enabling and disabling. Soft interrupts produce a speed-up of ~25% on a kernel build. Subtleties - UML uses sigsetjmp/siglongjmp to switch contexts. sigsetjmp has been wrapped in a save_flags-like macro which remembers the interrupt state at setjmp time, and restores it when it is longjmp-ed back to. The enable_signals function has to loop because the IRQ handler disables interrupts before returning. enable_signals has to return with signals enabled, and signals may come in between the disabling and the return to enable_signals. So, it loops for as long as there are pending signals, ensuring that signals are enabled when it finally returns, and that there are no pending signals that need to be dealt with. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: eliminate some globalsJeff Dike2006-01-18
| | | | | | | | | | Stop using global variables to hold the file descriptor and offset used to map the skas0 stubs. Instead, calculate them using the page physical addresses. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: move libc-dependent skas process handlingGennady Sharapov2006-01-18
| | | | | | | | | | | | | The serial UML OS-abstraction layer patch (um/kernel/skas dir). This moves all systemcalls from skas/process.c file under os-Linux dir and join skas/process.c and skas/process_kern.c files. Signed-off-by: Gennady Sharapov <gennady.v.sharapov@intel.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: move libc-dependent skas memory mapping codeGennady Sharapov2006-01-18
| | | | | | | | | | | | | The serial UML OS-abstraction layer patch (um/kernel/skas dir). This moves all systemcalls from skas/mem_user.c file under os-Linux dir and join skas/mem_user.c and skas/mem.c files. Signed-off-by: Gennady Sharapov <gennady.v.sharapov@intel.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: move headers to arch/um/includeGennady Sharapov2006-01-18
| | | | | | | | | | | | The serial UML OS-abstraction layer patch (um/kernel dir). This moves skas headers to arch/um/include. Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: change interface to boot_timer_handlerBodo Stroesser2006-01-18
| | | | | | | | | | | | | | Current implementation of boot_timer_handler isn't usable for s390. So I changed its name to do_boot_timer_handler, taking (struct sigcontext *)sc as argument. do_boot_timer_handler is called from new boot_timer_handler() in arch/um/os-Linux/signal.c, which uses the same mechanisms as other signal handler to find out sigcontext pointer. Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: move libc-dependent time codeGennady Sharapov2006-01-18
| | | | | | | | | | | | | The serial UML OS-abstraction layer patch (um/kernel dir). This moves all systemcalls from time.c file under os-Linux dir and joins time.c and tine_kernel.c files Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: move libc-dependent utility proceduresGennady Sharapov2006-01-18
| | | | | | | | | | | | The serial UML OS-abstraction layer patch (um/kernel dir). This moves all systemcalls from user_util.c file under os-Linux dir Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: move LDT creationBodo Stroesser2006-01-18
| | | | | | | | | | | | | | | s390 doesn't have a LDT. So MM_COPY_SEGMENTS will not be supported on s390. The only user of MM_COPY_SEGMENTS is new_mm(), but that's no longer useful, as arch/sys-i386/ldt.c defines init_new_ldt(), which is called immediately after new_mm(). So we should copy host's LDT in init_new_ldt(), if /proc/mm is available, to have this subarch specific call in subarch code. Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivialLinus Torvalds2006-01-15
|\
| * return statement cleanup - kill pointless parenthesesJesper Juhl2006-01-14
| | | | | | | | | | | | | | This patch removes pointless parentheses from return statements. Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* | [PATCH] uml: fix symbol for mktimeMiklos Szeredi2006-01-14
|/ | | | | | | | | | | | | | | LD .tmp_vmlinux1 /usr/lib/gcc-lib/i486-linux/3.3.4/../../../libc.a(mktime.o): In function `timelocal': : multiple definition of `mktime' kernel/built-in.o:kernel/time.c:604: first defined here /usr/bin/ld: Warning: size of symbol `mktime' changed from 134 in kernel/built-in.o to 44 in /usr/lib/gcc-lib/i486-linux/3.3.4/../../../libc.a(mktime.o) collect2: ld returned 1 exit status Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: task_stack_page()Al Viro2006-01-12
| | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] uml: task_thread_info()Al Viro2006-01-12
| | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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