1. 12 Jun, 2013 8 commits
    • Dmitry Osipenko's avatar
      drivers/rtc/rtc-tps6586x.c: device wakeup flags correction · 5a280844
      Dmitry Osipenko authored
      Use device_init_wakeup() instead of device_set_wakeup_capable() and move
      it before rtc dev registering.  This fixes alarmtimer not registered
      when tps6586x rtc is the only wakeup compatible rtc in the system.
      Signed-off-by: default avatarDmitry Osipenko <digetx@gmail.com>
      Cc: Laxman Dewangan <ldewangan@nvidia.com>
      Cc: Jingoo Han <jg1.han@samsung.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      5a280844
    • Andrey Vagin's avatar
      memcg: don't initialize kmem-cache destroying work for root caches · f101a946
      Andrey Vagin authored
      struct memcg_cache_params has a union.  Different parts of this union
      are used for root and non-root caches.  A part with destroying work is
      used only for non-root caches.
      
        BUG: unable to handle kernel paging request at 0000000fffffffe0
        IP: kmem_cache_alloc+0x41/0x1f0
        Modules linked in: netlink_diag af_packet_diag udp_diag tcp_diag inet_diag unix_diag ip6table_filter ip6_tables i2c_piix4 virtio_net virtio_balloon microcode i2c_core pcspkr floppy
        CPU: 0 PID: 1929 Comm: lt-vzctl Tainted: G      D      3.10.0-rc1+ #2
        Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
        RIP: kmem_cache_alloc+0x41/0x1f0
        Call Trace:
         getname_flags.part.34+0x30/0x140
         getname+0x38/0x60
         do_sys_open+0xc5/0x1e0
         SyS_open+0x22/0x30
         system_call_fastpath+0x16/0x1b
        Code: f4 53 48 83 ec 18 8b 05 8e 53 b7 00 4c 8b 4d 08 21 f0 a8 10 74 0d 4c 89 4d c0 e8 1b 76 4a 00 4c 8b 4d c0 e9 92 00 00 00 4d 89 f5 <4d> 8b 45 00 65 4c 03 04 25 48 cd 00 00 49 8b 50 08 4d 8b 38 49
        RIP  [<ffffffff8116b641>] kmem_cache_alloc+0x41/0x1f0
      Signed-off-by: default avatarAndrey Vagin <avagin@openvz.org>
      Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
      Cc: Glauber Costa <glommer@parallels.com>
      Cc: Johannes Weiner <hannes@cmpxchg.org>
      Cc: Balbir Singh <bsingharora@gmail.com>
      Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Reviewed-by: default avatarMichal Hocko <mhocko@suse.cz>
      Cc: Li Zefan <lizefan@huawei.com>
      Cc: <stable@vger.kernel.org>	[3.9.x]
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      f101a946
    • Xiaowei.Hu's avatar
      ocfs2: ocfs2_prep_new_orphaned_file() should return ret · 7869e590
      Xiaowei.Hu authored
      If an error occurs, for example an EIO in __ocfs2_prepare_orphan_dir,
      ocfs2_prep_new_orphaned_file will release the inode_ac, then when the
      caller of ocfs2_prep_new_orphaned_file gets a 0 return, it will refer to
      a NULL ocfs2_alloc_context struct in the following functions.  A kernel
      panic happens.
      Signed-off-by: default avatar"Xiaowei.Hu" <xiaowei.hu@oracle.com>
      Reviewed-by: default avatarshencanquan <shencanquan@huawei.com>
      Acked-by: default avatarSunil Mushran <sunil.mushran@gmail.com>
      Cc: Joe Jin <joe.jin@oracle.com>
      Cc: Mark Fasheh <mfasheh@suse.com>
      Cc: Joel Becker <jlbec@evilplan.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      7869e590
    • Chen Gang's avatar
      lib/mpi/mpicoder.c: looping issue, need stop when equal to zero, found by 'EXTRA_FLAGS=-W'. · 5402b804
      Chen Gang authored
      For 'while' looping, need stop when 'nbytes == 0', or will cause issue.
      ('nbytes' is size_t which is always bigger or equal than zero).
      
      The related warning: (with EXTRA_CFLAGS=-W)
      
        lib/mpi/mpicoder.c:40:2: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
      Signed-off-by: default avatarChen Gang <gang.chen@asianux.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: David Howells <dhowells@redhat.com>
      Cc: James Morris <james.l.morris@oracle.com>
      Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
      Acked-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      5402b804
    • Kees Cook's avatar
      kmsg: honor dmesg_restrict sysctl on /dev/kmsg · 637241a9
      Kees Cook authored
      The dmesg_restrict sysctl currently covers the syslog method for access
      dmesg, however /dev/kmsg isn't covered by the same protections.  Most
      people haven't noticed because util-linux dmesg(1) defaults to using the
      syslog method for access in older versions.  With util-linux dmesg(1)
      defaults to reading directly from /dev/kmsg.
      
      To fix /dev/kmsg, let's compare the existing interfaces and what they
      allow:
      
       - /proc/kmsg allows:
        - open (SYSLOG_ACTION_OPEN) if CAP_SYSLOG since it uses a destructive
          single-reader interface (SYSLOG_ACTION_READ).
        - everything, after an open.
      
       - syslog syscall allows:
        - anything, if CAP_SYSLOG.
        - SYSLOG_ACTION_READ_ALL and SYSLOG_ACTION_SIZE_BUFFER, if
          dmesg_restrict==0.
        - nothing else (EPERM).
      
      The use-cases were:
       - dmesg(1) needs to do non-destructive SYSLOG_ACTION_READ_ALLs.
       - sysklog(1) needs to open /proc/kmsg, drop privs, and still issue the
         destructive SYSLOG_ACTION_READs.
      
      AIUI, dmesg(1) is moving to /dev/kmsg, and systemd-journald doesn't
      clear the ring buffer.
      
      Based on the comments in devkmsg_llseek, it sounds like actions besides
      reading aren't going to be supported by /dev/kmsg (i.e.
      SYSLOG_ACTION_CLEAR), so we have a strict subset of the non-destructive
      syslog syscall actions.
      
      To this end, move the check as Josh had done, but also rename the
      constants to reflect their new uses (SYSLOG_FROM_CALL becomes
      SYSLOG_FROM_READER, and SYSLOG_FROM_FILE becomes SYSLOG_FROM_PROC).
      SYSLOG_FROM_READER allows non-destructive actions, and SYSLOG_FROM_PROC
      allows destructive actions after a capabilities-constrained
      SYSLOG_ACTION_OPEN check.
      
       - /dev/kmsg allows:
        - open if CAP_SYSLOG or dmesg_restrict==0
        - reading/polling, after open
      
      Addresses https://bugzilla.redhat.com/show_bug.cgi?id=903192
      
      [akpm@linux-foundation.org: use pr_warn_once()]
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      Reported-by: default avatarChristian Kujau <lists@nerdbynature.de>
      Tested-by: default avatarJosh Boyer <jwboyer@redhat.com>
      Cc: Kay Sievers <kay@vrfy.org>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      637241a9
    • Robin Holt's avatar
      reboot: rigrate shutdown/reboot to boot cpu · cf7df378
      Robin Holt authored
      We recently noticed that reboot of a 1024 cpu machine takes approx 16
      minutes of just stopping the cpus.  The slowdown was tracked to commit
      f96972f2 ("kernel/sys.c: call disable_nonboot_cpus() in
      kernel_restart()").
      
      The current implementation does all the work of hot removing the cpus
      before halting the system.  We are switching to just migrating to the
      boot cpu and then continuing with shutdown/reboot.
      
      This also has the effect of not breaking x86's command line parameter
      for specifying the reboot cpu.  Note, this code was shamelessly copied
      from arch/x86/kernel/reboot.c with bits removed pertaining to the
      reboot_cpu command line parameter.
      Signed-off-by: default avatarRobin Holt <holt@sgi.com>
      Tested-by: default avatarShawn Guo <shawn.guo@linaro.org>
      Cc: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Russ Anderson <rja@sgi.com>
      Cc: Robin Holt <holt@sgi.com>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      cf7df378
    • Srivatsa S. Bhat's avatar
      CPU hotplug: provide a generic helper to disable/enable CPU hotplug · 16e53dbf
      Srivatsa S. Bhat authored
      There are instances in the kernel where we would like to disable CPU
      hotplug (from sysfs) during some important operation.  Today the freezer
      code depends on this and the code to do it was kinda tailor-made for
      that.
      
      Restructure the code and make it generic enough to be useful for other
      usecases too.
      Signed-off-by: default avatarSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
      Signed-off-by: default avatarRobin Holt <holt@sgi.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Russ Anderson <rja@sgi.com>
      Cc: Robin Holt <holt@sgi.com>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Shawn Guo <shawn.guo@linaro.org>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      16e53dbf
    • Linus Torvalds's avatar
      Merge branch 'fixes-3.10' of git://git.infradead.org/users/willy/linux-nvme · 77293e21
      Linus Torvalds authored
      Pull NVMe fixes from Matthew Wilcox.
      
      * 'fixes-3.10' of git://git.infradead.org/users/willy/linux-nvme:
        NVMe: Add MSI support
        NVMe: Use dma_set_mask() correctly
        Return the result from user admin command IOCTL even in case of failure
        NVMe: Do not cancel command multiple times
        NVMe: fix error return code in nvme_submit_bio_queue()
        NVMe: check for integer overflow in nvme_map_user_pages()
        MAINTAINERS: update NVM EXPRESS DRIVER file list
        NVMe: Fix a signedness bug in nvme_trans_modesel_get_mp
        NVMe: Remove redundant version.h header include
      77293e21
  2. 11 Jun, 2013 9 commits
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.kernel.org/pub/scm/virt/kvm/kvm · af180b81
      Linus Torvalds authored
      Pull kvm bugfixes from Gleb Natapov:
       "There is one more fix for MIPS KVM ABI here, MIPS and PPC build
        breakage fixes and a couple of PPC bug fixes"
      
      * 'fixes' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        kvm/ppc/booke64: Fix lazy ee handling in kvmppc_handle_exit()
        kvm/ppc/booke: Hold srcu lock when calling gfn functions
        kvm/ppc/booke64: Disable e6500 support
        kvm/ppc/booke64: Fix AltiVec interrupt numbers and build breakage
        mips/kvm: Use KVM_REG_MIPS and proper size indicators for *_ONE_REG
        kvm: Add definition of KVM_REG_MIPS
        KVM: add kvm_para_available to asm-generic/kvm_para.h
      af180b81
    • Scott Wood's avatar
      kvm/ppc/booke64: Fix lazy ee handling in kvmppc_handle_exit() · 7c11c0cc
      Scott Wood authored
      EE is hard-disabled on entry to kvmppc_handle_exit(), so call
      hard_irq_disable() so that PACA_IRQ_HARD_DIS is set, and soft_enabled
      is unset.
      
      Without this, we get warnings such as arch/powerpc/kernel/time.c:300,
      and sometimes host kernel hangs.
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
      7c11c0cc
    • Scott Wood's avatar
      kvm/ppc/booke: Hold srcu lock when calling gfn functions · f1e89028
      Scott Wood authored
      KVM core expects arch code to acquire the srcu lock when calling
      gfn_to_memslot and similar functions.
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
      f1e89028
    • Scott Wood's avatar
      kvm/ppc/booke64: Disable e6500 support · 2b6398fc
      Scott Wood authored
      The previous patch made 64-bit booke KVM build again, but Altivec
      support is still not complete, and we can't prevent the guest from
      turning on Altivec (which can corrupt host state until state
      save/restore is implemented).  Disable e6500 on KVM until this is
      fixed.
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
      2b6398fc
    • Mihai Caraman's avatar
      kvm/ppc/booke64: Fix AltiVec interrupt numbers and build breakage · 4edd1ae9
      Mihai Caraman authored
      Interrupt numbers defined for Book3E follows IVORs definition. Align
      BOOKE_INTERRUPT_ALTIVEC_UNAVAIL and BOOKE_INTERRUPT_ALTIVEC_ASSIST to this
      rule which also fixes the build breakage.
      IVORs 32 and 33 are shared so reflect this in the interrupts naming.
      
      This fixes a build break for 64-bit booke KVM.
      Signed-off-by: default avatarMihai Caraman <mihai.caraman@freescale.com>
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
      4edd1ae9
    • David Daney's avatar
      mips/kvm: Use KVM_REG_MIPS and proper size indicators for *_ONE_REG · 681865d4
      David Daney authored
      The API requires that the GET_ONE_REG and SET_ONE_REG ioctls have this
      extra information encoded in the register identifiers.
      Signed-off-by: default avatarDavid Daney <david.daney@cavium.com>
      Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
      681865d4
    • David Daney's avatar
      kvm: Add definition of KVM_REG_MIPS · 2a8fedd0
      David Daney authored
      We use 0x7000000000000000ULL as 0x6000000000000000ULL is reserved for
      ARM64.
      Signed-off-by: default avatarDavid Daney <david.daney@cavium.com>
      Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
      2a8fedd0
    • Ben Greear's avatar
      Fix lockup related to stop_machine being stuck in __do_softirq. · 34376a50
      Ben Greear authored
      The stop machine logic can lock up if all but one of the migration
      threads make it through the disable-irq step and the one remaining
      thread gets stuck in __do_softirq.  The reason __do_softirq can hang is
      that it has a bail-out based on jiffies timeout, but in the lockup case,
      jiffies itself is not incremented.
      
      To work around this, re-add the max_restart counter in __do_irq and stop
      processing irqs after 10 restarts.
      
      Thanks to Tejun Heo and Rusty Russell and others for helping me track
      this down.
      
      This was introduced in 3.9 by commit c10d7367 ("softirq: reduce
      latencies").
      
      It may be worth looking into ath9k to see if it has issues with its irq
      handler at a later date.
      
      The hang stack traces look something like this:
      
          ------------[ cut here ]------------
          WARNING: at kernel/watchdog.c:245 watchdog_overflow_callback+0x9c/0xa7()
          Watchdog detected hard LOCKUP on cpu 2
          Modules linked in: ath9k ath9k_common ath9k_hw ath mac80211 cfg80211 nfsv4 auth_rpcgss nfs fscache nf_nat_ipv4 nf_nat veth 8021q garp stp mrp llc pktgen lockd sunrpc]
          Pid: 23, comm: migration/2 Tainted: G         C   3.9.4+ #11
          Call Trace:
           <NMI>   warn_slowpath_common+0x85/0x9f
            warn_slowpath_fmt+0x46/0x48
            watchdog_overflow_callback+0x9c/0xa7
            __perf_event_overflow+0x137/0x1cb
            perf_event_overflow+0x14/0x16
            intel_pmu_handle_irq+0x2dc/0x359
            perf_event_nmi_handler+0x19/0x1b
            nmi_handle+0x7f/0xc2
            do_nmi+0xbc/0x304
            end_repeat_nmi+0x1e/0x2e
           <<EOE>>
            cpu_stopper_thread+0xae/0x162
            smpboot_thread_fn+0x258/0x260
            kthread+0xc7/0xcf
            ret_from_fork+0x7c/0xb0
          ---[ end trace 4947dfa9b0a4cec3 ]---
          BUG: soft lockup - CPU#1 stuck for 22s! [migration/1:17]
          Modules linked in: ath9k ath9k_common ath9k_hw ath mac80211 cfg80211 nfsv4 auth_rpcgss nfs fscache nf_nat_ipv4 nf_nat veth 8021q garp stp mrp llc pktgen lockd sunrpc]
          irq event stamp: 835637905
          hardirqs last  enabled at (835637904): __do_softirq+0x9f/0x257
          hardirqs last disabled at (835637905): apic_timer_interrupt+0x6d/0x80
          softirqs last  enabled at (5654720): __do_softirq+0x1ff/0x257
          softirqs last disabled at (5654725): irq_exit+0x5f/0xbb
          CPU 1
          Pid: 17, comm: migration/1 Tainted: G        WC   3.9.4+ #11 To be filled by O.E.M. To be filled by O.E.M./To be filled by O.E.M.
          RIP: tasklet_hi_action+0xf0/0xf0
          Process migration/1
          Call Trace:
           <IRQ>
            __do_softirq+0x117/0x257
            irq_exit+0x5f/0xbb
            smp_apic_timer_interrupt+0x8a/0x98
            apic_timer_interrupt+0x72/0x80
           <EOI>
            printk+0x4d/0x4f
            stop_machine_cpu_stop+0x22c/0x274
            cpu_stopper_thread+0xae/0x162
            smpboot_thread_fn+0x258/0x260
            kthread+0xc7/0xcf
            ret_from_fork+0x7c/0xb0
      Signed-off-by: default avatarBen Greear <greearb@candelatech.com>
      Acked-by: default avatarTejun Heo <tj@kernel.org>
      Acked-by: default avatarPekka Riikonen <priikone@iki.fi>
      Cc: Eric Dumazet <eric.dumazet@gmail.com>
      Cc: stable@kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      34376a50
    • Linus Torvalds's avatar
      Merge tag '9p-3.10-bug-fix-1' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs · 1b79821f
      Linus Torvalds authored
      Pull net/9p bug fix from Eric Van Hensbergen:
       "zero copy error fix"
      
      * tag '9p-3.10-bug-fix-1' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
        net/9p: Handle error in zero copy request correctly for 9p2000.u
      1b79821f
  3. 10 Jun, 2013 7 commits
    • Linus Torvalds's avatar
      Merge tag 'spi-v3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi · ab029631
      Linus Torvalds authored
      Pull spi fixes from Mark Brown:
       "A few nasty issues, particularly a race with the interrupt controller
        in the xilinx driver, together with a couple of more minor fixes and a
        much needed move of the mailing list away from sourceforge."
      
      * tag 'spi-v3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
        spi: hspi: fixup long delay time
        spi: spi-xilinx: Remove ISR race condition
        spi: topcliff-pch: fix error return code in pch_spi_probe()
        spi: topcliff-pch: Pass correct pointer to free_irq()
        spi: Move mailing list to vger
      ab029631
    • Linus Torvalds's avatar
      Merge tag 'stable/for-linus-3.10-rc5-tag' of... · 50e6f851
      Linus Torvalds authored
      Merge tag 'stable/for-linus-3.10-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
      
      Pull xen fixes from Konrad Rzeszutek Wilk:
       "Two bug-fixes for regressions:
         - xen/tmem stopped working after a certain combination of
           modprobe/swapon was used
         - cpu online/offlining would trigger WARN_ON."
      
      * tag 'stable/for-linus-3.10-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
        xen/tmem: Don't over-write tmem_frontswap_poolid after tmem_frontswap_init set it.
        xen/smp: Fixup NOHZ per cpu data when onlining an offline CPU.
      50e6f851
    • Linus Torvalds's avatar
      Merge tag 'regmap-v3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap · 30f5f739
      Linus Torvalds authored
      Pull regmap fixes from Mark Brown:
       "The biggest fix here is Lars-Peter's fix for custom locking callbacks
        which is pretty localised but important for those devices that use the
        feature.  Otherwise we've got a couple of fairly small cleanups which
        would have been sent sooner were it not for letting Lars-Peter's patch
        soak for a while"
      
      * tag 'regmap-v3.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
        regmap: rbtree: Fixed node range check on sync
        regmap: regcache: Fixup locking for custom lock callbacks
        regmap: debugfs: Check return value of regmap_write()
      30f5f739
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 · 822b4b6f
      Linus Torvalds authored
      Pull crypto fixes from Herbert Xu:
       "This fixes a build problem in sahara and temporarily disables two new
        optimisations because of performance regressions until a permanent fix
        is ready"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
        crypto: sahara - fix building as module
        crypto: blowfish - disable AVX2 implementation
        crypto: twofish - disable AVX2 implementation
      822b4b6f
    • Konrad Rzeszutek Wilk's avatar
      xen/tmem: Don't over-write tmem_frontswap_poolid after tmem_frontswap_init set it. · b2c75c44
      Konrad Rzeszutek Wilk authored
      Commit 10a7a077 ("xen: tmem: enable Xen
      tmem shim to be built/loaded as a module") allows the tmem module
      to be loaded any time. For this work the frontswap API had to
      be able to asynchronously to call tmem_frontswap_init before
      or after the swap image had been set. That was added in git
      commit 905cd0e1
      ("mm: frontswap: lazy initialization to allow tmem backends to build/run as modules").
      
      Which means we could do this (The common case):
      
       modprobe tmem		[so calls frontswap_register_ops, no ->init]
      			 modifies tmem_frontswap_poolid = -1
       swapon /dev/xvda1	[__frontswap_init, calls -> init, tmem_frontswap_poolid is
      			 < 0 so tmem hypercall done]
      
      Or the failing one:
      
       swapon /dev/xvda1	[calls __frontswap_init, sets the need_init bitmap]
       modprobe tmem		[calls frontswap_register_ops, -->init calls, finds out
      			tmem_frontswap_poolid is 0, does not make a hypercall.
      			Later in the module_init, sets tmem_frontswap_poolid=-1]
      
      Which meant that in the failing case we would not call the hypercall
      to initialize the pool and never be able to make any frontswap
      backend calls.
      
      Moving the frontswap_register_ops after setting the tmem_frontswap_poolid
      fixes it.
      Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Reviewed-by: default avatarBob Liu <bob.liu@oracle.com>
      b2c75c44
    • Linus Torvalds's avatar
      Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc · ae75d84f
      Linus Torvalds authored
      Pull powerpc fixes from Benjamin Herrenschmidt:
       "This is purely regressions (though not all recent ones) or stable
        material"
      
      * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
        powerpc: Partial revert of "Context switch more PMU related SPRs"
        powerpc/perf: Fix deadlock caused by calling printk() in PMU exception
        powerpc/hw_breakpoints: Add DABRX cpu feature to fix 32-bit regression
        powerpc/power8: Update denormalization handler
        powerpc/pseries: Simplify denormalization handler
        powerpc/power8: Fix oprofile and perf
        powerpc/eeh: Don't check RTAS token to get PE addr
        powerpc/pci: Check the bus address instead of resource address in pcibios_fixup_resources
      ae75d84f
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm · 0b52a3c8
      Linus Torvalds authored
      Pull ARM fixes from Russell King:
       "The biggest two fixes are fixing a compilation error with the
        decompressor, and a problem with our __my_cpu_offset implementation.
      
        Other changes are very trivial and small, which seems to be the way
        for most -rc stuff."
      
      * 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
        ARM: 7747/1: pcpu: ensure __my_cpu_offset cannot be re-ordered across barrier()
        ARM: 7750/1: update legacy CPU ID in decompressor cache support jump table
        ARM: 7743/1: compressed/head.S: work around new binutils warning
        ARM: 7742/1: topology: export cpu_topology
        ARM: 7737/1: fix kernel decompressor compilation error with CONFIG_DEBUG_SEMIHOSTING
      0b52a3c8
  4. 09 Jun, 2013 11 commits
  5. 08 Jun, 2013 5 commits