1. 07 Feb, 2008 38 commits
  2. 06 Feb, 2008 2 commits
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86 · 3e6bdf47
      Linus Torvalds authored
      * git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
        x86: fix deadlock, make pgd_lock irq-safe
        virtio: fix trivial build bug
        x86: fix mttr trimming
        x86: delay CPA self-test and repeat it
        x86: fix 64-bit sections
        generic: add __FINITDATA
        x86: remove suprious ifdefs from pageattr.c
        x86: mark the .rodata section also NX
        x86: fix iret exception recovery on 64-bit
        cpuidle: dubious one-bit signed bitfield in cpuidle.h
        x86: fix sparse warnings in powernow-k8.c
        x86: fix sparse error in traps_32.c
        x86: trivial sparse/checkpatch in quirks.c
        x86 ptrace: disallow null cs/ss
        MAINTAINERS: RDC R-321x SoC maintainer
        brk randomization: introduce CONFIG_COMPAT_BRK
        brk: check the lower bound properly
        x86: remove X2 workaround
        x86: make spurious fault handler aware of large mappings
        x86: make traps on entry code be debuggable in user space, 64-bit
      3e6bdf47
    • Ingo Molnar's avatar
      x86: fix deadlock, make pgd_lock irq-safe · 58d5d0d8
      Ingo Molnar authored
      lockdep just caught this one:
      
      =================================
      [ INFO: inconsistent lock state ]
      2.6.24 #38
      ---------------------------------
      inconsistent {in-softirq-W} -> {softirq-on-W} usage.
      swapper/1 [HC0[0]:SC0[0]:HE1:SE1] takes:
       (pgd_lock){-+..}, at: [<ffffffff8022a9ea>] mm_init+0x1da/0x250
      {in-softirq-W} state was registered at:
        [<ffffffffffffffff>] 0xffffffffffffffff
      irq event stamp: 394559
      hardirqs last  enabled at (394559): [<ffffffff80267f0a>] get_page_from_freelist+0x30a/0x4c0
      hardirqs last disabled at (394558): [<ffffffff80267d25>] get_page_from_freelist+0x125/0x4c0
      softirqs last  enabled at (393952): [<ffffffff80232f8e>] __do_softirq+0xce/0xe0
      softirqs last disabled at (393945): [<ffffffff8020c57c>] call_softirq+0x1c/0x30
      
      other info that might help us debug this:
      no locks held by swapper/1.
      
      stack backtrace:
      Pid: 1, comm: swapper Not tainted 2.6.24 #38
      
      Call Trace:
       [<ffffffff8024e1fb>] print_usage_bug+0x18b/0x190
       [<ffffffff8024f55d>] mark_lock+0x53d/0x560
       [<ffffffff8024fffa>] __lock_acquire+0x3ca/0xed0
       [<ffffffff80250ba8>] lock_acquire+0xa8/0xe0
       [<ffffffff8022a9ea>] ? mm_init+0x1da/0x250
       [<ffffffff809bcd10>] _spin_lock+0x30/0x70
       [<ffffffff8022a9ea>] mm_init+0x1da/0x250
       [<ffffffff8022aa99>] mm_alloc+0x39/0x50
       [<ffffffff8028b95a>] bprm_mm_init+0x2a/0x1a0
       [<ffffffff8028d12b>] do_execve+0x7b/0x220
       [<ffffffff80209776>] sys_execve+0x46/0x70
       [<ffffffff8020c214>] kernel_execve+0x64/0xd0
       [<ffffffff8020901e>] ? _stext+0x1e/0x20
       [<ffffffff802090ba>] init_post+0x9a/0xf0
       [<ffffffff809bc5f6>] ? trace_hardirqs_on_thunk+0x35/0x3a
       [<ffffffff8024f75a>] ? trace_hardirqs_on+0xba/0xd0
       [<ffffffff8020c1a8>] ? child_rip+0xa/0x12
       [<ffffffff8020bcbc>] ? restore_args+0x0/0x44
       [<ffffffff8020c19e>] ? child_rip+0x0/0x12
      
      turns out that pgd_lock has been used on 64-bit x86 in an irq-unsafe
      way for almost two years, since commit 8c914cb7.
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      58d5d0d8