1. 17 10月, 2008 1 次提交
  2. 09 2月, 2008 1 次提交
    • J
      uml: runtime host VMSPLIT detection · 536788fe
      Jeff Dike 提交于
      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: NJeff Dike <jdike@linux.intel.com>
      Cc: Miklos Szeredi <miklos@szeredi.hu>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      536788fe
  3. 06 2月, 2008 2 次提交
    • J
      uml: cover stubs with a VMA · 3963333f
      Jeff Dike 提交于
      Give the stubs a VMA.  This allows the removal of a truly nasty kludge to make
      sure that mm->nr_ptes was correct in exit_mmap.  The underlying problem was
      always that the stubs, which have ptes, and thus allocated a page table,
      weren't covered by a VMA.
      
      This patch fixes that by using install_special_mapping in arch_dup_mmap and
      activate_context to create the VMA.  The stubs have to be moved, since
      shift_arg_pages seems to assume that the stack is the only VMA present at that
      point during exec, and uses vma_adjust to fiddle its VMA.  However, that
      extends the stub VMA by the amount removed from the stack VMA.
      
      To avoid this problem, the stubs were moved to a different fixed location at
      the start of the address space.
      
      The init_stub_pte calls were moved from init_new_context to arch_dup_mmap
      because I was occasionally seeing arch_dup_mmap not being called, causing
      exit_mmap to die.  Rather than figure out what was really happening, I decided
      it was cleaner to just move the calls so that there's no doubt that both the
      pte and VMA creation happen, no matter what.  arch_exit_mmap is used to clear
      the stub ptes at exit time.
      
      The STUB_* constants in as-layout.h no longer depend on UM_TASK_SIZE, that
      that definition is removed, along with the comments complaining about gcc.
      
      Because the stubs are no longer at the top of the address space, some care is
      needed while flushing TLBs.  update_pte_range checks for addresses in the stub
      range and skips them.  flush_thread now issues two unmaps, one for the range
      before STUB_START and one for the range after STUB_END.
      Signed-off-by: NJeff Dike <jdike@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      3963333f
    • J
      uml: clean up TASK_SIZE usage · 42a2b54c
      Jeff Dike 提交于
      Clean up the calculation and use of the usable address space size on the host.
      
      task_size is gone, replaced with TASK_SIZE, which is calculated from
      CONFIG_TOP_ADDR.  get_kmem_end and set_task_sizes_skas are also gone.
      
      host_task_size, which refers to the entire address space usable by the UML
      kernel and which may be larger than the address space usable by a UML process,
      since that has to end on a pgdir boundary, is replaced by CONFIG_TOP_ADDR.
      
      STACK_TOP is now TASK_SIZE minus the two stub pages.
      Signed-off-by: NJeff Dike <jdike@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      42a2b54c
  4. 17 10月, 2007 7 次提交
    • J
      uml: fix stub address calculations · 54ae36f2
      Jeff Dike 提交于
      The calculation of CONFIG_STUB_CODE and CONFIG_STUB_DATA didn't take into
      account anything but 3G/1G and 2G/2G, leaving the other vmsplits out in the
      cold.
      
      I'd rather not duplicate the four known host vmsplit cases for each of these
      symbols.  I'd also like to calculate them based on the highest userspace
      address.
      
      The Kconfig language seems not to allow calculation of hex constants, so I
      moved this to as-layout.h.  CONFIG_STUB_CODE, CONFIG_STUB_DATA, and
      CONFIG_STUB_START are now gone.  In their place are STUB_CODE, STUB_DATA, and
      STUB_START in as-layout.h.
      
      i386 and x86_64 seem to differ as to whether an unadorned constant is an int
      or a long, so I cast them to unsigned long so they can be printed
      consistently.  However, they are also used in stub.S, where C types don't work
      so well.  So, there are ASM_ versions of these constants for use in stub.S.  I
      also ifdef-ed the non-asm-friendly portion of as-layout.h.
      
      With this in place, most of the rest of this patch is changing CONFIG_STUB_*
      to STUB_*, except in stub.S, where they are changed to ASM_STUB_*.
      
      defconfig has the old symbols deleted.
      
      I also print these addresses out in case there is any problem mapping them on
      the host.
      
      The two stub.S files had some trailing whitespace, so that is cleaned up here.
      
      [akpm@linux-foundation.org: coding-style fixes]
      Signed-off-by: NJeff Dike <jdike@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      54ae36f2
    • J
      uml: fold mmu_context_skas into mm_context · 6c738ffa
      Jeff Dike 提交于
      This patch folds mmu_context_skas into struct mm_context, changing all users
      of these structures as needed.
      Signed-off-by: NJeff Dike <jdike@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      6c738ffa
    • J
      uml: get rid of do_longjmp · fab95c55
      Jeff Dike 提交于
      do_longjmp used to be needed when UML didn't have its own implementation of
      setjmp and longjmp.  They came from libc, and couldn't be called directly from
      kernel code, as the libc jmp_buf couldn't be imported there.  do_longjmp was a
      userspace function which served to provide longjmp access to kernel code.
      
      This is gone, and a number of void * pointers can now be jmp_buf *.
      Signed-off-by: NJeff Dike <jdike@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      fab95c55
    • J
      uml: style fixes pass 3 · ba180fd4
      Jeff Dike 提交于
      Formatting changes in the files which have been changed in the course
      of folding foo_skas functions into their callers.  These include:
      	copyright updates
      	header file trimming
      	style fixes
      	adding severity to printks
      
      These changes should be entirely non-functional.
      Signed-off-by: NJeff Dike <jdike@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      ba180fd4
    • J
      uml: remove code made redundant by CHOOSE_MODE removal · 77bf4400
      Jeff Dike 提交于
      This patch makes a number of simplifications enabled by the removal of
      CHOOSE_MODE.  There were lots of functions that looked like
      
      	int foo(args){
      		foo_skas(args);
      	}
      
      The bodies of foo_skas are now folded into foo, and their declarations (and
      sometimes entire header files) are deleted.
      
      In addition, the union uml_pt_regs, which was a union between the tt and skas
      register formats, is now a struct, with the tt-mode arm of the union being
      removed.
      
      It turns out that usr2_handler was unused, so it is gone.
      Signed-off-by: NJeff Dike <jdike@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      77bf4400
    • J
      uml: throw out CHOOSE_MODE · 6aa802ce
      Jeff Dike 提交于
      The next stage after removing code which depends on CONFIG_MODE_TT is removing
      the CHOOSE_MODE abstraction, which provided both compile-time and run-time
      branching to either tt-mode or skas-mode code.
      
      This patch removes choose-mode.h and all inclusions of it, and replaces all
      CHOOSE_MODE invocations with the skas branch.  This leaves a number of trivial
      functions which will be dealt with in a later patch.
      
      There are some changes in the uaccess and tls support which go somewhat beyond
      this and eliminate some of the now-redundant functions.
      Signed-off-by: NJeff Dike <jdike@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      6aa802ce
    • J
      uml: throw out CONFIG_MODE_TT · 42fda663
      Jeff Dike 提交于
      This patchset throws out tt mode, which has been non-functional for a while.
      
      This is done in phases, interspersed with code cleanups on the affected files.
      
      The removal is done as follows:
      	remove all code, config options, and files which depend on
      CONFIG_MODE_TT
      	get rid of the CHOOSE_MODE macro, which decided whether to
      call tt-mode or skas-mode code, and replace invocations with their
      skas portions
      	replace all now-trivial procedures with their skas equivalents
      
      There are now a bunch of now-redundant pieces of data structures, including
      mode-specific pieces of the thread structure, pt_regs, and mm_context.  These
      are all replaced with their skas-specific contents.
      
      As part of the ongoing style compliance project, I made a style pass over all
      files that were changed.  There are three such patches, one for each phase,
      covering the files affected by that phase but no later ones.
      
      I noticed that we weren't freeing the LDT state associated with a process when
      it exited, so that's fixed in one of the later patches.
      
      The last patch is a tidying patch which I've had for a while, but which caused
      inexplicable crashes under tt mode.  Since that is no longer a problem, this
      can now go in.
      
      This patch:
      
      Start getting rid of tt mode support.
      
      This patch throws out CONFIG_MODE_TT and all config options, code, and files
      which depend on it.
      
      CONFIG_MODE_SKAS is gone and everything that depends on it is included
      unconditionally.
      
      The few changed lines are in re-written Kconfig help, lines which needed
      something skas-related removed from them, and a few more which weren't
      strictly deletions.
      Signed-off-by: NJeff Dike <jdike@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      42fda663
  5. 30 7月, 2007 1 次提交
    • A
      Remove fs.h from mm.h · 4e950f6f
      Alexey Dobriyan 提交于
      Remove fs.h from mm.h. For this,
       1) Uninline vma_wants_writenotify(). It's pretty huge anyway.
       2) Add back fs.h or less bloated headers (err.h) to files that need it.
      
      As result, on x86_64 allyesconfig, fs.h dependencies cut down from 3929 files
      rebuilt down to 3444 (-12.3%).
      
      Cross-compile tested without regressions on my two usual configs and (sigh):
      
      alpha              arm-mx1ads        mips-bigsur          powerpc-ebony
      alpha-allnoconfig  arm-neponset      mips-capcella        powerpc-g5
      alpha-defconfig    arm-netwinder     mips-cobalt          powerpc-holly
      alpha-up           arm-netx          mips-db1000          powerpc-iseries
      arm                arm-ns9xxx        mips-db1100          powerpc-linkstation
      arm-assabet        arm-omap_h2_1610  mips-db1200          powerpc-lite5200
      arm-at91rm9200dk   arm-onearm        mips-db1500          powerpc-maple
      arm-at91rm9200ek   arm-picotux200    mips-db1550          powerpc-mpc7448_hpc2
      arm-at91sam9260ek  arm-pleb          mips-ddb5477         powerpc-mpc8272_ads
      arm-at91sam9261ek  arm-pnx4008       mips-decstation      powerpc-mpc8313_rdb
      arm-at91sam9263ek  arm-pxa255-idp    mips-e55             powerpc-mpc832x_mds
      arm-at91sam9rlek   arm-realview      mips-emma2rh         powerpc-mpc832x_rdb
      arm-ateb9200       arm-realview-smp  mips-excite          powerpc-mpc834x_itx
      arm-badge4         arm-rpc           mips-fulong          powerpc-mpc834x_itxgp
      arm-carmeva        arm-s3c2410       mips-ip22            powerpc-mpc834x_mds
      arm-cerfcube       arm-shannon       mips-ip27            powerpc-mpc836x_mds
      arm-clps7500       arm-shark         mips-ip32            powerpc-mpc8540_ads
      arm-collie         arm-simpad        mips-jazz            powerpc-mpc8544_ds
      arm-corgi          arm-spitz         mips-jmr3927         powerpc-mpc8560_ads
      arm-csb337         arm-trizeps4      mips-malta           powerpc-mpc8568mds
      arm-csb637         arm-versatile     mips-mipssim         powerpc-mpc85xx_cds
      arm-ebsa110        i386              mips-mpc30x          powerpc-mpc8641_hpcn
      arm-edb7211        i386-allnoconfig  mips-msp71xx         powerpc-mpc866_ads
      arm-em_x270        i386-defconfig    mips-ocelot          powerpc-mpc885_ads
      arm-ep93xx         i386-up           mips-pb1100          powerpc-pasemi
      arm-footbridge     ia64              mips-pb1500          powerpc-pmac32
      arm-fortunet       ia64-allnoconfig  mips-pb1550          powerpc-ppc64
      arm-h3600          ia64-bigsur       mips-pnx8550-jbs     powerpc-prpmc2800
      arm-h7201          ia64-defconfig    mips-pnx8550-stb810  powerpc-ps3
      arm-h7202          ia64-gensparse    mips-qemu            powerpc-pseries
      arm-hackkit        ia64-sim          mips-rbhma4200       powerpc-up
      arm-integrator     ia64-sn2          mips-rbhma4500       s390
      arm-iop13xx        ia64-tiger        mips-rm200           s390-allnoconfig
      arm-iop32x         ia64-up           mips-sb1250-swarm    s390-defconfig
      arm-iop33x         ia64-zx1          mips-sead            s390-up
      arm-ixp2000        m68k              mips-tb0219          sparc
      arm-ixp23xx        m68k-amiga        mips-tb0226          sparc-allnoconfig
      arm-ixp4xx         m68k-apollo       mips-tb0287          sparc-defconfig
      arm-jornada720     m68k-atari        mips-workpad         sparc-up
      arm-kafa           m68k-bvme6000     mips-wrppmc          sparc64
      arm-kb9202         m68k-hp300        mips-yosemite        sparc64-allnoconfig
      arm-ks8695         m68k-mac          parisc               sparc64-defconfig
      arm-lart           m68k-mvme147      parisc-allnoconfig   sparc64-up
      arm-lpd270         m68k-mvme16x      parisc-defconfig     um-x86_64
      arm-lpd7a400       m68k-q40          parisc-up            x86_64
      arm-lpd7a404       m68k-sun3         powerpc              x86_64-allnoconfig
      arm-lubbock        m68k-sun3x        powerpc-cell         x86_64-defconfig
      arm-lusl7200       mips              powerpc-celleb       x86_64-up
      arm-mainstone      mips-atlas        powerpc-chrp32
      Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      4e950f6f
  6. 08 5月, 2007 2 次提交
  7. 12 2月, 2007 1 次提交
  8. 09 12月, 2006 1 次提交
    • P
      [PATCH] tty: ->signal->tty locking · 24ec839c
      Peter Zijlstra 提交于
      Fix the locking of signal->tty.
      
      Use ->sighand->siglock to protect ->signal->tty; this lock is already used
      by most other members of ->signal/->sighand.  And unless we are 'current'
      or the tasklist_lock is held we need ->siglock to access ->signal anyway.
      
      (NOTE: sys_unshare() is broken wrt ->sighand locking rules)
      
      Note that tty_mutex is held over tty destruction, so while holding
      tty_mutex any tty pointer remains valid.  Otherwise the lifetime of ttys
      are governed by their open file handles.  This leaves some holes for tty
      access from signal->tty (or any other non file related tty access).
      
      It solves the tty SLAB scribbles we were seeing.
      
      (NOTE: the change from group_send_sig_info to __group_send_sig_info needs to
             be examined by someone familiar with the security framework, I think
             it is safe given the SEND_SIG_PRIV from other __group_send_sig_info
             invocations)
      
      [schwidefsky@de.ibm.com: 3270 fix]
      [akpm@osdl.org: various post-viro fixes]
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Acked-by: NAlan Cox <alan@redhat.com>
      Cc: Oleg Nesterov <oleg@tv-sign.ru>
      Cc: Prarit Bhargava <prarit@redhat.com>
      Cc: Chris Wright <chrisw@sous-sol.org>
      Cc: Roland McGrath <roland@redhat.com>
      Cc: Stephen Smalley <sds@tycho.nsa.gov>
      Cc: James Morris <jmorris@namei.org>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Jeff Dike <jdike@addtoit.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Jan Kara <jack@ucw.cz>
      Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      24ec839c
  9. 26 9月, 2006 1 次提交
  10. 11 7月, 2006 1 次提交
  11. 01 4月, 2006 2 次提交
  12. 28 3月, 2006 1 次提交
  13. 02 2月, 2006 1 次提交
  14. 19 1月, 2006 1 次提交
  15. 29 5月, 2005 1 次提交
  16. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds 提交于
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4