1. 11 Mar, 2009 7 commits
  2. 10 Mar, 2009 21 commits
  3. 09 Mar, 2009 9 commits
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq · 99adcd9d
      Linus Torvalds authored
      * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
        [CPUFREQ] Add p4-clockmod sysfs-ui removal to feature-removal schedule.
        Revert "[CPUFREQ] Disable sysfs ui for p4-clockmod."
      99adcd9d
    • Oleg Nesterov's avatar
      copy_process: fix CLONE_PARENT && parent_exec_id interaction · 2d5516cb
      Oleg Nesterov authored
      CLONE_PARENT can fool the ->self_exec_id/parent_exec_id logic. If we
      re-use the old parent, we must also re-use ->parent_exec_id to make
      sure exit_notify() sees the right ->xxx_exec_id's when the CLONE_PARENT'ed
      task exits.
      
      Also, move down the "p->parent_exec_id = p->self_exec_id" thing, to place
      two different cases together.
      Signed-off-by: default avatarOleg Nesterov <oleg@redhat.com>
      Cc: Roland McGrath <roland@redhat.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Serge E. Hallyn <serge@hallyn.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      2d5516cb
    • Dave Jones's avatar
    • Dave Jones's avatar
      Revert "[CPUFREQ] Disable sysfs ui for p4-clockmod." · 129f8ae9
      Dave Jones authored
      This reverts commit e088e4c9.
      
      Removing the sysfs interface for p4-clockmod was flagged as a
      regression in bug 12826.
      
      Course of action:
       - Find out the remaining causes of overheating, and fix them
         if possible. ACPI should be doing the right thing automatically.
         If it isn't, we need to fix that.
       - mark p4-clockmod ui as deprecated
       - try again with the removal in six months.
      
      It's not really feasible to printk about the deprecation, because
      it needs to happen at all the sysfs entry points, which means adding
      a lot of strcmp("p4-clockmod".. calls to the core, which.. bleuch.
      Signed-off-by: default avatarDave Jones <davej@redhat.com>
      129f8ae9
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 · df0b4a50
      Linus Torvalds authored
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (29 commits)
        p54: fix race condition in memory management
        cfg80211: test before subtraction on unsigned
        iwlwifi: fix error flow in iwl*_pci_probe
        rt2x00 : more devices to rt73usb.c
        rt2x00 : more devices to rt2500usb.c
        bonding: Fix device passed into ->ndo_neigh_setup().
        vlan: Fix vlan-in-vlan crashes.
        net: Fix missing dev->neigh_setup in register_netdevice().
        tmspci: fix request_irq race
        pkt_sched: act_police: Fix a rate estimator test.
        tg3: Fix 5906 link problems
        SCTP: change sctp_ctl_sock_init() to try IPv4 if IPv6 fails
        IPv6: add "disable" module parameter support to ipv6.ko
        sungem: another error printed one too early
        aoe: error printed 1 too early
        net pcmcia: worklimit reaches -1
        net: more timeouts that reach -1
        net: fix tokenring license
        dm9601: new vendor/product IDs
        netlink: invert error code in netlink_set_err()
        ...
      df0b4a50
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus · 39a3478c
      Linus Torvalds authored
      * git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
        lguest: fix for CONFIG_SPARSE_IRQ=y
        lguest: fix crash 'unhandled trap 13 at <native_read_msr_safe>'
      39a3478c
    • Linus Torvalds's avatar
    • Chris Mason's avatar
      Btrfs: fix spinlock assertions on UP systems · b9447ef8
      Chris Mason authored
      btrfs_tree_locked was being used to make sure a given extent_buffer was
      properly locked in a few places.  But, it wasn't correct for UP compiled
      kernels.
      
      This switches it to using assert_spin_locked instead, and renames it to
      btrfs_assert_tree_locked to better reflect how it was really being used.
      Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      b9447ef8
    • Heiko Carstens's avatar
      Fix fixpoint divide exception in acct_update_integrals · 6d5b5acc
      Heiko Carstens authored
      Frans Pop reported the crash below when running an s390 kernel under Hercules:
      
        Kernel BUG at 000738b4  verbose debug info unavailable!
        fixpoint divide exception: 0009  #1! SMP
        Modules linked in: nfs lockd nfs_acl sunrpc ctcm fsm tape_34xx
           cu3088 tape ccwgroup tape_class ext3 jbd mbcache dm_mirror dm_log dm_snapshot
           dm_mod dasd_eckd_mod dasd_mod
        CPU: 0 Not tainted 2.6.27.19 #13
        Process awk (pid: 2069, task: 0f9ed9b8, ksp: 0f4f7d18)
        Krnl PSW : 070c1000 800738b4 (acct_update_integrals+0x4c/0x118)
                   R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:0 CC:1 PM:0
        Krnl GPRS: 00000000 000007d0 7fffffff fffff830
                   00000000 ffffffff 00000002 0f9ed9b8
                   00000000 00008ca0 00000000 0f9ed9b8
                   0f9edda4 8007386e 0f4f7ec8 0f4f7e98
        Krnl Code: 800738aa: a71807d0         lhi     %r1,2000
                   800738ae: 8c200001         srdl    %r2,1
                   800738b2: 1d21             dr      %r2,%r1
                  >800738b4: 5810d10e         l       %r1,270(%r13)
                   800738b8: 1823             lr      %r2,%r3
                   800738ba: 4130f060         la      %r3,96(%r15)
                   800738be: 0de1             basr    %r14,%r1
                   800738c0: 5800f060         l       %r0,96(%r15)
        Call Trace:
        ( <000000000004fdea>! blocking_notifier_call_chain+0x1e/0x2c)
          <0000000000038502>! do_exit+0x106/0x7c0
          <0000000000038c36>! do_group_exit+0x7a/0xb4
          <0000000000038c8e>! SyS_exit_group+0x1e/0x30
          <0000000000021c28>! sysc_do_restart+0x12/0x16
          <0000000077e7e924>! 0x77e7e924
      
      Reason for this is that cpu time accounting usually only happens from
      interrupt context, but acct_update_integrals gets also called from
      process context with interrupts enabled.
      
      So in acct_update_integrals we may end up with the following scenario:
      
      Between reading tsk->stime/tsk->utime and tsk->acct_timexpd an interrupt
      happens which updates accouting values.  This causes acct_timexpd to be
      greater than the former stime + utime.  The subsequent calculation of
      
      	dtime = cputime_sub(time, tsk->acct_timexpd);
      
      will be negative and the division performed by
      
      	cputime_to_jiffies(dtime)
      
      will generate an exception since the result won't fit into a 32 bit
      register.
      
      In order to fix this just always disable interrupts while accessing any
      of the accounting values.
      
      Reported by: Frans Pop <elendil@planet.nl>
      Tested by: Frans Pop <elendil@planet.nl>
      Cc: stable@kernel.org
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      6d5b5acc
  4. 08 Mar, 2009 3 commits
    • Rusty Russell's avatar
      lguest: fix for CONFIG_SPARSE_IRQ=y · 6db6a5f3
      Rusty Russell authored
      Impact: remove lots of lguest boot WARN_ON() when CONFIG_SPARSE_IRQ=y
      
      We now need to call irq_to_desc_alloc_cpu() before
      set_irq_chip_and_handler_name(), but we can't do that from init_IRQ (no
      kmalloc available).
      
      So do it as we use interrupts instead.  Also means we only alloc for
      irqs we use, which was the intent of CONFIG_SPARSE_IRQ anyway.
      Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
      Cc: Ingo Molnar <mingo@redhat.com>
      6db6a5f3
    • Rusty Russell's avatar
      lguest: fix crash 'unhandled trap 13 at <native_read_msr_safe>' · cbd88c8e
      Rusty Russell authored
      Impact: fix lguest boot crash on modern Intel machines
      
      The code in early_init_intel does:
      
      	if (c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xd)) {
      		u64 misc_enable;
      
      		rdmsrl(MSR_IA32_MISC_ENABLE, misc_enable);
      
      And that rdmsr faults (not allowed from non-0 PL).  We can get around
      this by mugging the family ID part of the cpuid.  5 seems like a good
      number.
      
      Of course, this is a hack (how very lguest!).  We could just indicate
      that we don't support MSRs, or implement lguest_rdmst.
      Reported-by: default avatarPatrick McHardy <kaber@trash.net>
      Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
      Tested-by: default avatarPatrick McHardy <kaber@trash.net>
      cbd88c8e
    • Stuart Bennett's avatar
      x86 mmiotrace: fix remove_kmmio_fault_pages() · d0fc63f7
      Stuart Bennett authored
      Impact: fix race+crash in mmiotrace
      
      The list manipulation in remove_kmmio_fault_pages() was broken. If more
      than one consecutive kmmio_fault_page was re-added during the grace
      period between unregister_kmmio_probe() and remove_kmmio_fault_pages(),
      the list manipulation failed to remove pages from the release list.
      
      After a second grace period the pages get into rcu_free_kmmio_fault_pages()
      and raise a BUG_ON() kernel crash.
      
      The list manipulation is fixed to properly remove pages from the release
      list.
      
      This bug has been present from the very beginning of mmiotrace in the
      mainline kernel. It was introduced in 0fd0e3da ("x86: mmiotrace full
      patch, preview 1");
      
      An urgent fix for Linus. Tested by Stuart (on 32-bit) and Pekka
      (on amd and intel 64-bit systems, nouveau and nvidia proprietary).
      Signed-off-by: default avatarStuart Bennett <stuart@freedesktop.org>
      Signed-off-by: default avatarPekka Paalanen <pq@iki.fi>
      LKML-Reference: <20090308202135.34933feb@daedalus.pq.iki.fi>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      d0fc63f7