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* uml: fix inconsistence due to tty_operation changeWANG Cong2008-05-082-3/+3
| | | | | | | | | | | 'put_char' of 'struct tty_operations' has changed from 'void' into 'int'. This can also shut up compiler warnings. Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: WANG Cong <wangcong@zeuux.org> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Revert "uml: fix gcc problem"Linus Torvalds2008-05-071-4/+1
| | | | | | | | | | | | | | | | This reverts commit 22eecde2f9034764a3fd095eecfa3adfb8ec9a98. Uli reports that it breaks UML on x86-64 with the Fedora 8 gcc (gcc 4.1.2), causing a crash on startup. See http://marc.info/?l=linux-kernel&m=121011722806093&w=2 for a trace. Reported-by: Ulrich Drepper <drepper@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: fix gcc problemIngo Molnar2008-05-041-1/+4
| | | | | | | | this is what caused gcc 4.3 to throw an internal error when OPTIMIZE_INLINING was enabled ... Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* unified (weak) sys_pipe implementationUlrich Drepper2008-05-031-17/+0
| | | | | | | | | | | | | | | | | | | This replaces the duplicated arch-specific versions of "sys_pipe()" with one unified implementation. This removes almost 250 lines of duplicated code. It's marked __weak, so that *if* an architecture wants to override the default implementation it can do so by simply having its own replacement version, since many architectures use alternate calling conventions for the 'pipe()' system call for legacy reasons (ie traditional UNIX implementations often return the two file descriptors in registers) I still haven't changed the cris version even though Linus says the BKL isn't needed. The arch maintainer can easily do it if there are really no obstacles. Signed-off-by: Ulrich Drepper <drepper@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* proc: remove proc_root from driversAlexey Dobriyan2008-04-292-2/+2
| | | | | | | | | | | | Remove proc_root export. Creation and removal works well if parent PDE is supplied as NULL -- it worked always that way. So, one useless export removed and consistency added, some drivers created PDEs with &proc_root as parent but removed them as NULL and so on. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* proper extern for late_time_initAdrian Bunk2008-04-291-2/+1
| | | | | | | | | | | Add a proper extern for late_time_init in include/linux/init.h Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: clean up arch/um/drivers/ubd_kern.cWANG Cong2008-04-281-195/+190
| | | | | | | | | | | | | Make some global functions and variables static. And remove some useless declarations for local functions, since we just need to move their definitions ahead. [jdike@addtoit.com: checkpatch cleanups] Signed-off-by: WANG Cong <wangcong@zeuux.org> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* arch/um/os-Linux/sys-i386/task_size.c: improve a bitWANG Cong2008-04-281-4/+8
| | | | | | | | | | Improve this code a bit: check sigaction's return value and remove a useless fflush(). Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: WANG Cong <wangcong@zeuux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: make several things staticWANG Cong2008-04-283-7/+7
| | | | | | | | | Make several things static, because they no longer need to be global. Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: WANG Cong <wangcong@zeuux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: make three functions staticWANG Cong2008-04-283-3/+3
| | | | | | | | | | | | | Make the following three functions static, since they don't need to be global. arch/um/drivers/mcast_kern.c::mcast_setup() arch/um/drivers/mconsole_user.c::mconsole_reply_v0() arch/um/drivers/port_user.c::port_pre_exec() Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: WANG Cong <wangcong@zeuux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: remove a useless functionWANG Cong2008-04-282-14/+0
| | | | | | | | | arch/um/drivers/chan_kern.c::chan_out_fd() is not used by anyone. Remove it. Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: WANG Cong <wangcong@zeuux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: make a function staticWANG Cong2008-04-282-2/+1
| | | | | | | | | arch/um/drivers/chan_kern.c::open_chan() can become static. Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: WANG Cong <wangcong@zeuux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* arch/um/os-Linux/start_up.c: various improvements.WANG Cong2008-04-281-8/+6
| | | | | | | | | | | - lets ptrace_child become void - adds checking for the return value of change_sig - moves errors info into stderr instead of stdout. Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: WANG Cong <wangcong@zeuux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: replace remaining __FUNCTION__ occurrencesHarvey Harrison2008-04-281-1/+1
| | | | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* arch/um/kernel/um_arch.c: some small improvementsWANG Cong2008-04-281-3/+4
| | | | | | | | | Make some small improvements for arch/um/kernel/um_arch.c. Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Acked-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86, bitops: select the generic bitmap search functionsAlexander van Heukelum2008-04-262-16/+0
| | | | | | | | | | | | | | | | | | Introduce GENERIC_FIND_FIRST_BIT and GENERIC_FIND_NEXT_BIT in lib/Kconfig, defaulting to off. An arch that wants to use the generic implementation now only has to use a select statement to include them. I added an always-y option (X86_CPU) to arch/x86/Kconfig.cpu and used that to select the generic search functions. This way ARCH=um SUBARCH=i386 automatically picks up the change too, and arch/um/Kconfig.i386 can therefore be simplified a bit. ARCH=um SUBARCH=x86_64 does things differently, but still compiles fine. It seems that a "def_bool y" always wins over a "def_bool n"? Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, UML: remove x86-specific implementations of find_first_bitAlexander van Heukelum2008-04-264-2/+10
| | | | | | | | | | | x86 has been switched to the generic versions of find_first_bit and find_first_zero_bit, but the original versions were retained. This patch just removes the now unused x86-specific versions. also update UML. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, uml: fix uml with generic find_next_bit for x86Alexander van Heukelum2008-04-262-0/+8
| | | | | | | Update UML to use the generic bits too. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* uml: Kconfig cleanupIngo Molnar2008-04-261-0/+7
| | | | | | | | pointed out by Linus: arch/um/Kconfig.x86_64 should include arch/x86/Kconfig.cpu instead of defining those symbols itself. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* uml: fix build errorIngo Molnar2008-04-261-0/+1
| | | | | | | | | fix: arch/um/os-Linux/helper.c: In function 'run_helper': arch/um/os-Linux/helper.c:73: error: 'PATH_MAX' undeclared (first use in this function) Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Generic semaphore implementationMatthew Wilcox2008-04-175-38/+3
| | | | | | | | | | | Semaphores are no longer performance-critical, so a generic C implementation is better for maintainability, debuggability and extensibility. Thanks to Peter Zijlstra for fixing the lockdep warning. Thanks to Harvey Harrison for pointing out that the unlikely() was unnecessary. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: Ingo Molnar <mingo@elte.hu>
* [UML]: uml-net: don't set IFF_ALLMULTI in set_multicast_listPatrick McHardy2008-03-261-5/+1
| | | | | | | | | | | | IFF_ALLMULTI is an indication from the network stack to the driver to disable multicast filters, drivers should never set it directly. Since the UML networking device doesn't have any filtering capabilites, it doesn't the set_multicast_list function at all, it is kept so userspace can still issue SIOCADDMULTI/SIOCDELMULTI ioctls however. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* sched: add declaration of sched_tail to sched.hHarvey Harrison2008-02-251-2/+0
| | | | | | | | | | Avoids sparse warnings: kernel/sched.c:2170:17: warning: symbol 'schedule_tail' was not declared. Should it be static? Avoids the need for an external declaration in arch/um/process.c Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* uml: fix FP register corruptionJeff Dike2008-02-246-0/+49
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit ee3d9bd4de1ed93d2a7ee41c331ed30a1c7b8acd ("uml: simplify SIGSEGV handling"), while greatly simplifying the kernel SIGSEGV handler that runs in the process address space, introduced a bug which corrupts FP state in the process. Previously, the SIGSEGV handler called the sigreturn system call by hand - it couldn't return through the restorer provided to it because that could try to call the libc restorer which likely wouldn't exist in the process address space. So, it blocked off some signals, including SIGUSR1, on entry to the SIGSEGV handler, queued a SIGUSR1 to itself, and invoked sigreturn. The SIGUSR1 was delivered, and was visible to the UML kernel after sigreturn finished. The commit eliminated the signal masking and the call to sigreturn. The handler simply hits itself with a SIGTRAP to let the UML kernel know that it is finished. UML then restores the process registers, which effectively longjmps the process out of the signal handler, skipping sigreturn's restoring of register state and the signal mask. The bug is that the host apparently sets used_fp to 0 when it saves the process FP state in the sigcontext on the process signal stack. Thus, when the process is longjmped out of the handler, its FP state is corrupt because it wasn't saved on the context switch to the UML kernel. This manifested itself as sleep hanging. For some reason, sleep uses floating point in order to calculate the sleep interval. When a page fault corrupts its FP state, it is faked into essentially sleeping forever. This patch saves the FP state before entering the SIGSEGV handler and restores it afterwards. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: fix helper_wait calls in watchdogJohann Felix Soden2008-02-241-2/+2
| | | | | | | | | | | | | | | In commit 1aa351a308d2c3ddb92b6cc45083fc54271d0010 ("uml: tidy helper code") the arguments of helper_wait() were changed. The adaptation of harddog_user.c was forgotten, so this errors occur: /arch/um/drivers/harddog_user.c: In function 'start_watchdog': /arch/um/drivers/harddog_user.c:82: error: too many arguments to function 'helper_wait' /arch/um/drivers/harddog_user.c:89: error: too many arguments to function 'helper_wait' Signed-off-by: Johann Felix Soden <johfel@users.sourceforge.net> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: remove unused sigcontext accessorsJeff Dike2008-02-242-55/+0
| | | | | | | | | | | The macros which extract registers from a struct sigcontext are no longer needed and can be removed. They are starting not to build anyway, given the removal of the 'e' and 'r' from register names during the x86 merge. Cc: Jiri Olsa <olsajiri@gmail.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* arch/um/kernel/mem.c: fix a shadowed variableWANG Cong2008-02-241-3/+3
| | | | | | | | | | Fix a shadowed variable in arch/um/kernel/mem.c, since there is a global variable has the same name. Cc: Jeff Dike <jdike@linux.intel.com> Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* UML: update defconfigJeff Dike2008-02-241-93/+187
| | | | | | | | | Update defconfig. Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: fix initrd printkJohann Felix Soden2008-02-241-1/+1
| | | | | | | | | | | If the initrd file has zero-length, the error message should contain the filepath. Cc: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Johann Felix Soden <johfel@users.sourceforge.net> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Embed a struct path into struct nameidata instead of nd->{dentry,mnt}Jan Blunck2008-02-151-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the central patch of a cleanup series. In most cases there is no good reason why someone would want to use a dentry for itself. This series reflects that fact and embeds a struct path into nameidata. Together with the other patches of this series - it enforced the correct order of getting/releasing the reference count on <dentry,vfsmount> pairs - it prepares the VFS for stacking support since it is essential to have a struct path in every place where the stack can be traversed - it reduces the overall code size: without patch series: text data bss dec hex filename 5321639 858418 715768 6895825 6938d1 vmlinux with patch series: text data bss dec hex filename 5320026 858418 715768 6894212 693284 vmlinux This patch: Switch from nd->{dentry,mnt} to nd->path.{dentry,mnt} everywhere. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix cifs] [akpm@linux-foundation.org: fix smack] Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: fix mm_context memory leakJeff Dike2008-02-082-0/+6
| | | | | | | | | | | | | | [ Spotted by Miklos ] Fix a memory leak in init_new_context. The struct page ** buffer allocated for install_special_mapping was never recorded, and thus leaked when the mm_struct was freed. Fix it by saving the pointer in mm_context_t and freeing it in arch_exit_mmap. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: improved error handling while locating temp dirJim Meyering2008-02-081-9/+6
| | | | | | | | | | | | | | * arch/um/os-Linux/mem.c (make_tempfile): Don't deref NULL upon failed malloc. * arch/um/os-Linux/mem.c (make_tempfile): Handle NULL tempdir. Don't let a long tempdir (e.g., via TMPDIR) provoke heap corruption. [ jdike - formatting cleanups, deleted obsolete comment ] Signed-off-by: Jim Meyering <meyering@redhat.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: style fixes in arch/um/os-LinuxJeff Dike2008-02-0814-129/+98
| | | | | | | | | | | | | | | | | | | | | Style changes under arch/um/os-Linux: include trimming CodingStyle fixes some printks needed severity indicators make_tempfile turns out not to be used outside of mem.c, so it is now static. Its declaration in tempfile.h is no longer needed, and tempfile.h itself is no longer needed. create_tmp_file was also made static. checkpatch moans about an EXPORT_SYMBOL in user_syms.c which is part of a macro definition - this is copying a bit of kernel infrastructure into the libc side of UML because the kernel headers can't be included there. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: runtime host VMSPLIT detectionJeff Dike2008-02-0813-72/+148
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Calculate TASK_SIZE at run-time by figuring out the host's VMSPLIT - this is needed on i386 if UML is to run on hosts with varying VMSPLITs without recompilation. TASK_SIZE is now defined in terms of a variable, task_size. This gets rid of an include of pgtable.h from processor.h, which can cause include loops. On i386, task_size is calculated early in boot by probing the address space in a binary search to figure out where the boundary between usable and non-usable memory is. This tries to make sure that a page that is considered to be in userspace is, or can be made, read-write. I'm concerned about a system-global VDSO page in kernel memory being hit and considered to be a userspace page. On x86_64, task_size is just the old value of CONFIG_TOP_ADDR. A bunch of config variable are gone now. CONFIG_TOP_ADDR is directly replaced by TASK_SIZE. NEST_LEVEL is gone since the relocation of the stubs makes it irrelevant. All the HOST_VMSPLIT stuff is gone. All references to these in arch/um/Makefile are also gone. I noticed and fixed a missing extern in os.h when adding os_get_task_size. Note: This has been revised to fix the 32-bit UML on 64-bit host bug that Miklos ran into. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* CONFIG_HIGHPTE vs. sub-page page tables.Martin Schwidefsky2008-02-081-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Background: I've implemented 1K/2K page tables for s390. These sub-page page tables are required to properly support the s390 virtualization instruction with KVM. The SIE instruction requires that the page tables have 256 page table entries (pte) followed by 256 page status table entries (pgste). The pgstes are only required if the process is using the SIE instruction. The pgstes are updated by the hardware and by the hypervisor for a number of reasons, one of them is dirty and reference bit tracking. To avoid wasting memory the standard pte table allocation should return 1K/2K (31/64 bit) and 2K/4K if the process is using SIE. Problem: Page size on s390 is 4K, page table size is 1K or 2K. That means the s390 version for pte_alloc_one cannot return a pointer to a struct page. Trouble is that with the CONFIG_HIGHPTE feature on x86 pte_alloc_one cannot return a pointer to a pte either, since that would require more than 32 bit for the return value of pte_alloc_one (and the pte * would not be accessible since its not kmapped). Solution: The only solution I found to this dilemma is a new typedef: a pgtable_t. For s390 pgtable_t will be a (pte *) - to be introduced with a later patch. For everybody else it will be a (struct page *). The additional problem with the initialization of the ptl lock and the NR_PAGETABLE accounting is solved with a constructor pgtable_page_ctor and a destructor pgtable_page_dtor. The page table allocation and free functions need to call these two whenever a page table page is allocated or freed. pmd_populate will get a pgtable_t instead of a struct page pointer. To get the pgtable_t back from a pmd entry that has been installed with pmd_populate a new function pmd_pgtable is added. It replaces the pmd_page call in free_pte_range and apply_to_pte_range. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* aout: remove unnecessary inclusions of {asm, linux}/a.out.hDavid Howells2008-02-081-1/+0
| | | | | | | | | | Remove now unnecessary inclusions of {asm,linux}/a.out.h. [akpm@linux-foundation.org: fix alpha build] Signed-off-by: David Howells <dhowells@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* aout: suppress A.OUT library support if !CONFIG_ARCH_SUPPORTS_AOUTDavid Howells2008-02-082-5/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Suppress A.OUT library support if CONFIG_ARCH_SUPPORTS_AOUT is not set. Not all architectures support the A.OUT binfmt, so the ELF binfmt should not be permitted to go looking for A.OUT libraries to load in such a case. Not only that, but under such conditions A.OUT core dumps are not produced either. To make this work, this patch also does the following: (1) Makes the existence of the contents of linux/a.out.h contingent on CONFIG_ARCH_SUPPORTS_AOUT. (2) Renames dump_thread() to aout_dump_thread() as it's only called by A.OUT core dumping code. (3) Moves aout_dump_thread() into asm/a.out-core.h and makes it inline. This is then included only where needed. This means that this bit of arch code will be stored in the appropriate A.OUT binfmt module rather than the core kernel. (4) Drops A.OUT support for Blackfin (according to Mike Frysinger it's not needed) and FRV. This patch depends on the previous patch to move STACK_TOP[_MAX] out of asm/a.out.h and into asm/processor.h as they're required whether or not A.OUT format is available. [jdike@addtoit.com: uml: re-remove accidentally restored code] Signed-off-by: David Howells <dhowells@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* aout: mark arches that support A.OUT formatDavid Howells2008-02-082-0/+4
| | | | | | | | | | | | | | | | | | | Mark arches that support A.OUT format by including the following in their master Kconfig files: config ARCH_SUPPORTS_AOUT def_bool y This should also be set if the arch provides compatibility A.OUT support for an older arch, for instance x86_64 for i386 or sparc64 for sparc. I've guessed at which arches don't, based on comments in the code, however I'm sure that some of the ones I've marked as 'yes' actually should be 'no'. Signed-off-by: David Howells <dhowells@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: make mconsole_stack namespace-awareJeff Dike2008-02-051-17/+18
| | | | | | | | | Also fixed the include syntax while I was there. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: redo the calculation of NR_syscallsJeff Dike2008-02-056-19/+25
| | | | | | | | | | | | | | | | | | | | Redo the calculation of NR_syscalls since that disappeared from i386 and use a similar mechanism on x86_64. We now figure out the size of the system call table in arch code and stick that in syscall_table_size. arch/um/kernel/skas/syscall.c defines NR_syscalls in terms of that since its the only thing that needs to know how many system calls there are. The old mechananism that was used on x86_64 is gone. arch/um/include/sysdep-i386/syscalls.h got some formatting since I was looking at it. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: defconfig tweaksJeff Dike2008-02-051-3/+3
| | | | | | | | | | | | Tweak the UML defconfig - we probably don't need 256 old-style ptys - this slows down udev noticably enable hostfs disable slab debugging - another noticable performance hit Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: port mutex conversionDaniel Walker2008-02-051-3/+4
| | | | | | | | | | | The port_sem is already used as a mutex since it's using DECLARE_MUTEX(), but the underlying construct is still a semaphore .. This patch switches it over to a struct mutex. Signed-off-by: Daniel Walker <dwalker@mvista.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: mconsole mutex conversionDaniel Walker2008-02-051-3/+4
| | | | | | | | | | | The plug_mem_mutex is already used as a mutex since it's using DECLARE_MUTEX(), but the underlying construct is still a semaphore .. This patch switches it over to a struct mutex. Signed-off-by: Daniel Walker <dwalker@mvista.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: LDT mutex conversionDaniel Walker2008-02-051-7/+7
| | | | | | | | | | The ldt.semaphore conforms to the new struct mutex requirments, so I converted it to use the new API and changed the name. Signed-off-by: Daniel Walker <dwalker@mvista.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: use of a public MAC is a warning, not an errorJeff Dike2008-02-051-5/+4
| | | | | | | | | | Downgrade one of the MAC validity checks. If it's one that could be possibly assigned to a physical NIC, then nothing will break. So, emit a warning in this case, but keep the requested MAC. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: fix infinite mconsole loopKarol Swietlicki2008-02-051-1/+3
| | | | | | | | | | | | | | | | | This patch takes care of a problem with the stopping code. The function inside the while condition returns 0 to signify a problem. A problem could be for example a bad command or a bad version of the mconsole client. A bad command would terminate the stopping loop and resume the kernel. This is a problem. A better solution is to make the loop infinite and don't leave it until we are explicitly told to. Signed-off-by: Karol Swietlicki <magotari@gmail.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: remove map_cbJeff Dike2008-02-051-7/+1
| | | | | | | | | | | | | John Reiser noticed that a physical memory region was being mapped twice. This patch fixes that, and it inlines the responsible function, as that had only one caller. Cc: John Reiser <jreiser@BitWagon.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: remove TOPDIRWANG Cong2008-02-052-13/+13
| | | | | | | | | | | TOPDIR is obsolete, use srctree instead. This patch removes TOPDIR from all UML Makefiles. Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: remove unused fields from mm_contextJeff Dike2008-02-051-4/+0
| | | | | | | | | The 3-level page table fixes forgot to remove a couple now-unused fields from struct mm_context. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* uml: move register initializationJeff Dike2008-02-051-3/+7
| | | | | | | | | | Calling init_registers inside the skas3 checking causes mysterious crashes if it doesn't happen because the skas3 checking is bypassed. This patch moves it to os_early_checks. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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