1. 19 Dec, 2014 20 commits
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · 018cb13e
      Linus Torvalds authored
      Merge misc patches from Andrew Morton:
       "A few stragglers"
      
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>:
        tools/testing/selftests/Makefile: alphasort the TARGETS list
        mm/zsmalloc: adjust order of functions
        ocfs2: fix journal commit deadlock
        ocfs2/dlm: fix race between dispatched_work and dlm_lockres_grab_inflight_worker
        ocfs2: reflink: fix slow unlink for refcounted file
        mm/memory.c:do_shared_fault(): add comment
        .mailmap: Santosh Shilimkar has moved
        .mailmap: update akpm@osdl.org
        lib/show_mem.c: add cma reserved information
        fs/proc/meminfo.c: include cma info in proc/meminfo
        mm: cma: split cma-reserved in dmesg log
        hfsplus: fix longname handling
        mm/mempolicy.c: remove unnecessary is_valid_nodemask()
      018cb13e
    • Andrew Morton's avatar
      tools/testing/selftests/Makefile: alphasort the TARGETS list · 96e869d8
      Andrew Morton authored
      This list is supposed to be sorted, to reduce patch collisions.
      
      Cc: Shuah Khan <shuah.kh@samsung.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      96e869d8
    • Ganesh Mahendran's avatar
      mm/zsmalloc: adjust order of functions · 66cdef66
      Ganesh Mahendran authored
      Currently functions in zsmalloc.c does not arranged in a readable and
      reasonable sequence.  With the more and more functions added, we may
      meet below inconvenience.  For example:
      
      Current functions:
      
          void zs_init()
          {
          }
      
          static void get_maxobj_per_zspage()
          {
          }
      
      Then I want to add a func_1() which is called from zs_init(), and this
      new added function func_1() will used get_maxobj_per_zspage() which is
      defined below zs_init().
      
          void func_1()
          {
              get_maxobj_per_zspage()
          }
      
          void zs_init()
          {
              func_1()
          }
      
          static void get_maxobj_per_zspage()
          {
          }
      
      This will cause compiling issue. So we must add a declaration:
      
          static void get_maxobj_per_zspage();
      
      before func_1() if we do not put get_maxobj_per_zspage() before
      func_1().
      
      In addition, puting module_[init|exit] functions at the bottom of the
      file conforms to our habit.
      
      So, this patch ajusts function sequence as:
      
          /* helper functions */
          ...
          obj_location_to_handle()
          ...
      
          /* Some exported functions */
          ...
      
          zs_map_object()
          zs_unmap_object()
      
          zs_malloc()
          zs_free()
      
          zs_init()
          zs_exit()
      Signed-off-by: default avatarGanesh Mahendran <opensource.ganesh@gmail.com>
      Cc: Nitin Gupta <ngupta@vflare.org>
      Acked-by: default avatarMinchan Kim <minchan@kernel.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      66cdef66
    • Junxiao Bi's avatar
      ocfs2: fix journal commit deadlock · 136f49b9
      Junxiao Bi authored
      For buffer write, page lock will be got in write_begin and released in
      write_end, in ocfs2_write_end_nolock(), before it unlock the page in
      ocfs2_free_write_ctxt(), it calls ocfs2_run_deallocs(), this will ask
      for the read lock of journal->j_trans_barrier.  Holding page lock and
      ask for journal->j_trans_barrier breaks the locking order.
      
      This will cause a deadlock with journal commit threads, ocfs2cmt will
      get write lock of journal->j_trans_barrier first, then it wakes up
      kjournald2 to do the commit work, at last it waits until done.  To
      commit journal, kjournald2 needs flushing data first, it needs get the
      cache page lock.
      
      Since some ocfs2 cluster locks are holding by write process, this
      deadlock may hung the whole cluster.
      
      unlock pages before ocfs2_run_deallocs() can fix the locking order, also
      put unlock before ocfs2_commit_trans() to make page lock is unlocked
      before j_trans_barrier to preserve unlocking order.
      Signed-off-by: default avatarJunxiao Bi <junxiao.bi@oracle.com>
      Reviewed-by: default avatarWengang Wang <wen.gang.wang@oracle.com>
      Cc: <stable@vger.kernel.org>
      Reviewed-by: default avatarMark Fasheh <mfasheh@suse.de>
      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>
      136f49b9
    • Joseph Qi's avatar
      ocfs2/dlm: fix race between dispatched_work and dlm_lockres_grab_inflight_worker · 1e589581
      Joseph Qi authored
      Commit ac4fef4d ("ocfs2/dlm: do not purge lockres that is queued for
      assert master") may have the following possible race case:
      
        dlm_dispatch_assert_master       dlm_wq
        ========================================================================
        queue_work(dlm->quedlm_worker,
            &dlm->dispatched_work);
                                       dispatch work,
                                       dlm_lockres_drop_inflight_worker
                                       *BUG_ON(res->inflight_assert_workers == 0)*
        dlm_lockres_grab_inflight_worker
        inflight_assert_workers++
      
      So ensure inflight_assert_workers to be increased first.
      Signed-off-by: default avatarJoseph Qi <joseph.qi@huawei.com>
      Signed-off-by: default avatarXue jiufei <xuejiufei@huawei.com>
      Cc: Joel Becker <jlbec@evilplan.org>
      Reviewed-by: default avatarMark Fasheh <mfasheh@suse.de>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1e589581
    • Junxiao Bi's avatar
      ocfs2: reflink: fix slow unlink for refcounted file · f62f12b3
      Junxiao Bi authored
      When running ocfs2 test suite multiple nodes reflink stress test, for a
      4 nodes cluster, every unlink() for refcounted file needs about 700s.
      
      The slow unlink is caused by the contention of refcount tree lock since
      all nodes are unlink files using the same refcount tree.  When the
      unlinking file have many extents(over 1600 in our test), most of the
      extents has refcounted flag set.  In ocfs2_commit_truncate(), it will
      execute the following call trace for every extents.  This means it needs
      get and released refcount tree lock about 1600 times.  And when several
      nodes are do this at the same time, the performance will be very low.
      
        ocfs2_remove_btree_range()
        --  ocfs2_lock_refcount_tree()
        ----  ocfs2_refcount_lock()
        ------  __ocfs2_cluster_lock()
      
      ocfs2_refcount_lock() is costly, move it to ocfs2_commit_truncate() to
      do lock/unlock once can improve a lot performance.
      Signed-off-by: default avatarJunxiao Bi <junxiao.bi@oracle.com>
      Cc: Wengang <wen.gang.wang@oracle.com>
      Reviewed-by: default avatarMark Fasheh <mfasheh@suse.de>
      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>
      f62f12b3
    • Andrew Morton's avatar
      mm/memory.c:do_shared_fault(): add comment · d82fa87d
      Andrew Morton authored
      Belatedly document the changes in commit f0c6d4d2 ("mm: introduce
      do_shared_fault() and drop do_fault()").
      
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Bob Liu <lliubbo@gmail.com>
      Cc: Dave Hansen <dave.hansen@linux.intel.com>
      Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
      Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Sasha Levin <sasha.levin@oracle.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d82fa87d
    • Santosh Shilimkar's avatar
      .mailmap: Santosh Shilimkar has moved · 48332f28
      Santosh Shilimkar authored
      Add my new email address along with kernel.org email id
      Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@oracle.com>
      Signed-off-by: default avatarSantosh Shilimkar <ssantosh@kernel.org>
      Cc: Joe Perches <joe@perches.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      48332f28
    • Andrew Morton's avatar
      7d19c8ff
    • Vishnu Pratap Singh's avatar
      lib/show_mem.c: add cma reserved information · 49abd8c2
      Vishnu Pratap Singh authored
      Add cma reserved information which is currently shown as a part of total
      reserved only.  This patch is continuation of our previous cma patches
      related to this.
      
        https://lkml.org/lkml/2014/10/20/64
        https://lkml.org/lkml/2014/10/22/383
      
      [akpm@linux-foundation.org: remove hopefully-unneeded ifdefs]
      Signed-off-by: default avatarVishnu Pratap Singh <vishnu.ps@samsung.com>
      Cc: David Rientjes <rientjes@google.com>
      Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Xishi Qiu <qiuxishi@huawei.com>
      Cc: Pintu Kumar <pintu.k@samsung.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      49abd8c2
    • Pintu Kumar's avatar
      fs/proc/meminfo.c: include cma info in proc/meminfo · 47f8f929
      Pintu Kumar authored
      This patch include CMA info (CMATotal, CMAFree) in /proc/meminfo.
      Currently, in a CMA enabled system, if somebody wants to know the total
      CMA size declared, there is no way to tell, other than the dmesg or
      /var/log/messages logs.
      
      With this patch we are showing the CMA info as part of meminfo, so that it
      can be determined at any point of time.  This will be populated only when
      CMA is enabled.
      
      Below is the sample output from a ARM based device with RAM:512MB and CMA:16MB.
      
        MemTotal:         471172 kB
        MemFree:          111712 kB
        MemAvailable:     271172 kB
        .
        .
        .
        CmaTotal:          16384 kB
        CmaFree:            6144 kB
      
      This patch also fix below checkpatch errors that were found during these changes.
      
        ERROR: space required after that ',' (ctx:ExV)
        199: FILE: fs/proc/meminfo.c:199:
        +       ,atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)
                ^
      
        ERROR: space required after that ',' (ctx:ExV)
        202: FILE: fs/proc/meminfo.c:202:
        +       ,K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
                ^
      
        ERROR: space required after that ',' (ctx:ExV)
        206: FILE: fs/proc/meminfo.c:206:
        +       ,K(totalcma_pages)
                ^
      
        total: 3 errors, 0 warnings, 2 checks, 236 lines checked
      Signed-off-by: default avatarPintu Kumar <pintu.k@samsung.com>
      Signed-off-by: default avatarVishnu Pratap Singh <vishnu.ps@samsung.com>
      Acked-by: default avatarMichal Nazarewicz <mina86@mina86.com>
      Cc: Rafael Aquini <aquini@redhat.com>
      Cc: Jerome Marchand <jmarchan@redhat.com>
      Cc: Marek Szyprowski <m.szyprowski@samsung.com>
      Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      47f8f929
    • Pintu Kumar's avatar
      mm: cma: split cma-reserved in dmesg log · e48322ab
      Pintu Kumar authored
      When the system boots up, in the dmesg logs we can see the memory
      statistics along with total reserved as below.  Memory: 458840k/458840k
      available, 65448k reserved, 0K highmem
      
      When CMA is enabled, still the total reserved memory remains the same.
      However, the CMA memory is not considered as reserved.  But, when we see
      /proc/meminfo, the CMA memory is part of free memory.  This creates
      confusion.  This patch corrects the problem by properly subtracting the
      CMA reserved memory from the total reserved memory in dmesg logs.
      
      Below is the dmesg snapshot from an arm based device with 512MB RAM and
      12MB single CMA region.
      
      Before this change:
        Memory: 458840k/458840k available, 65448k reserved, 0K highmem
      
      After this change:
        Memory: 458840k/458840k available, 53160k reserved, 12288k cma-reserved, 0K highmem
      Signed-off-by: default avatarPintu Kumar <pintu.k@samsung.com>
      Signed-off-by: default avatarVishnu Pratap Singh <vishnu.ps@samsung.com>
      Acked-by: default avatarMichal Nazarewicz <mina86@mina86.com>
      Cc: Rafael Aquini <aquini@redhat.com>
      Cc: Jerome Marchand <jmarchan@redhat.com>
      Cc: Marek Szyprowski <m.szyprowski@samsung.com>
      Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e48322ab
    • Sougata Santra's avatar
      hfsplus: fix longname handling · 89ac9b4d
      Sougata Santra authored
      Longname is not correctly handled by hfsplus driver.  If an attempt to
      create a longname(>255) file/directory is made, it succeeds by creating a
      file/directory with HFSPLUS_MAX_STRLEN and incorrect catalog key.  Thus
      leaving the volume in an inconsistent state.  This patch fixes this issue.
      
      Although lookup is always called first to create a negative entry, so just
      doing a check in lookup would probably fix this issue.  I choose to
      propagate error to other iops as well.
      
      Please NOTE: I have factored out hfsplus_cat_build_key_with_cnid from
      hfsplus_cat_build_key, to avoid unncessary branching.
      
      Thanks a lot.
      
        TEST:
        ------
        dir="TEST_DIR"
        cdir=`pwd`
        name255="_123456789_123456789_123456789_123456789_123456789_123456789\
        _123456789_123456789_123456789_123456789_123456789_123456789_123456789\
        _123456789_123456789_123456789_123456789_123456789_123456789_123456789\
        _123456789_123456789_123456789_123456789_123456789_1234"
        name256="${name255}5"
      
        mkdir $dir
        cd $dir
        touch $name255
        rm -f $name255
        touch $name256
        ls -la
        cd $cdir
        rm -rf $dir
      
        RESULT:
        -------
        [sougata@ultrabook tmp]$ cdir=`pwd`
        [sougata@ultrabook tmp]$
        name255="_123456789_123456789_123456789_123456789_123456789_123456789\
         > _123456789_123456789_123456789_123456789_123456789_123456789_123456789\
         > _123456789_123456789_123456789_123456789_123456789_123456789_123456789\
         > _123456789_123456789_123456789_123456789_123456789_1234"
        [sougata@ultrabook tmp]$ name256="${name255}5"
        [sougata@ultrabook tmp]$
        [sougata@ultrabook tmp]$ mkdir $dir
        [sougata@ultrabook tmp]$ cd $dir
        [sougata@ultrabook TEST_DIR]$ touch $name255
        [sougata@ultrabook TEST_DIR]$ rm -f $name255
        [sougata@ultrabook TEST_DIR]$ touch $name256
        [sougata@ultrabook TEST_DIR]$ ls -la
        ls: cannot access
        _123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_1234:
        No such file or directory
        total 0
        drwxrwxr-x 1 sougata sougata 3 Feb 20 19:56 .
        drwxrwxrwx 1 root    root    6 Feb 20 19:56 ..
        -????????? ? ?       ?       ?            ?
        _123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789_1234
        [sougata@ultrabook TEST_DIR]$ cd $cdir
        [sougata@ultrabook tmp]$ rm -rf $dir
        rm: cannot remove `TEST_DIR': Directory not empty
      
      -ENAMETOOLONG returned from hfsplus_asc2uni was not propaged to iops.
      This allowed hfsplus to create files/directories with HFSPLUS_MAX_STRLEN
      and incorrect keys, leaving the FS in an inconsistent state.  This patch
      fixes this issue.
      Signed-off-by: default avatarSougata Santra <sougata@tuxera.com>
      Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
      Cc: Vyacheslav Dubeyko <slava@dubeyko.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      89ac9b4d
    • Zhihui Zhang's avatar
      mm/mempolicy.c: remove unnecessary is_valid_nodemask() · 859f7ef1
      Zhihui Zhang authored
      When nodes is true, nsc->mask2 has already been filtered by nsc->mask1,
      which has already factored in node_states[N_MEMORY].
      Signed-off-by: default avatarZhihui Zhang <zzhsuny@gmail.com>
      Cc: Mel Gorman <mel@csn.ul.ie>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      859f7ef1
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 00c845db
      Linus Torvalds authored
      Pull networking fixes from David Miller:
      
       1) Fix NBMA tunnel mac header handling in GRE, from Timo Teräs.
      
       2) Fix a NAPI race in the fec driver, from Nimrod Andy.
      
       3) The new IFF_VNET_LE bit is outside the size of the flags member it
          is stored in (which is 16-bits), store the state locally in the
          drivers.  From Michael S Tsirkin.
      
       4) We are kicking the tires with the new wireless maintainership
          situation.  Bluetooth fixes via Johan Hedberg, and mac80211 fixes
          from Johannes Berg.
      
       5) Fix locking and leaks in geneve driver, from Jesse Gross.
      
       6) Make netlink TX mmap code always copy, so we don't have to be
          potentially exposed to the user changing the underlying contents
          from underneath us.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (63 commits)
        be2net: Fix incorrect setting of tunnel offload flag in netdev features
        bnx2x: fix typos in "configure"
        xen-netback: support frontends without feature-rx-notify again
        MAINTAINERS: changes for wireless
        cxgb4: Fix decoding QSA module for ethtool get settings
        geneve: Fix races between socket add and release.
        geneve: Remove socket and offload handlers at destruction.
        netlink: Don't reorder loads/stores before marking mmap netlink frame as available
        netlink: Always copy on mmap TX.
        Bluetooth: Fix bug with filter in service discovery optimization
        mac80211: free management frame keys when removing station
        net: Disallow providing non zero VLAN ID for NIC drivers FDB add flow
        net/mlx4: Cache line CQE/EQE stride fixes
        net: fec: Fix NAPI race
        xen-netfront: use napi_complete() correctly to prevent Rx stalling
        ip_tunnel: Add missing validation of encap type to ip_tunnel_encap_setup()
        ip_tunnel: Add sanity checks to ip_tunnel_encap_add_ops()
        net: Allow FIXED_PHY to be modular.
        if_tun: drop broken IFF_VNET_LE
        macvtap: drop broken IFF_VNET_LE
        ...
      00c845db
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · 28ee5809
      Linus Torvalds authored
      Pull sparc fix from David Miller:
       "Sparc32 locking bug fix from Andreas Larsson"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
        sparc32: destroy_context() and switch_mm() needs to disable interrupts.
      28ee5809
    • Linus Torvalds's avatar
      Merge tag 'arc-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc · 22943a6a
      Linus Torvalds authored
      Pull arch/arc updates from Vineet Gupta:
       "Minor updates for ARC for 3.19"
      
      * tag 'arc-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
        ARC: rename default defconfig
        ARC: [nsimosci] move peripherals to match model to FPGA
        ARC: document memory clobber in irq control macros
        ARC: R-M-W assist locks only needed for !LLSC
        ARC: add power management options
      22943a6a
    • Linus Torvalds's avatar
      Merge tag 'nios2-fixes-v3.19' of git://git.rocketboards.org/linux-socfpga-next · 39757e73
      Linus Torvalds authored
      Pull arch/nios2 fixes from Ley Foon Tan:
       - add definition of ioremap_wc to io.h to fix build error from make
         allmodconfig
       - fix make defconfig
       - fix sparse error
      
      * tag 'nios2-fixes-v3.19' of git://git.rocketboards.org/linux-socfpga-next:
        nios2/uaccess: fix sparse errors
        nios2: enable "make defconfig"
        nios2: add definition of ioremap_wc to io.h
      39757e73
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 66dcff86
      Linus Torvalds authored
      Pull KVM update from Paolo Bonzini:
       "3.19 changes for KVM:
      
         - spring cleaning: removed support for IA64, and for hardware-
           assisted virtualization on the PPC970
      
         - ARM, PPC, s390 all had only small fixes
      
        For x86:
         - small performance improvements (though only on weird guests)
         - usual round of hardware-compliancy fixes from Nadav
         - APICv fixes
         - XSAVES support for hosts and guests.  XSAVES hosts were broken
           because the (non-KVM) XSAVES patches inadvertently changed the KVM
           userspace ABI whenever XSAVES was enabled; hence, this part is
           going to stable.  Guest support is just a matter of exposing the
           feature and CPUID leaves support"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (179 commits)
        KVM: move APIC types to arch/x86/
        KVM: PPC: Book3S: Enable in-kernel XICS emulation by default
        KVM: PPC: Book3S HV: Improve H_CONFER implementation
        KVM: PPC: Book3S HV: Fix endianness of instruction obtained from HEIR register
        KVM: PPC: Book3S HV: Remove code for PPC970 processors
        KVM: PPC: Book3S HV: Tracepoints for KVM HV guest interactions
        KVM: PPC: Book3S HV: Simplify locking around stolen time calculations
        arch: powerpc: kvm: book3s_paired_singles.c: Remove unused function
        arch: powerpc: kvm: book3s_pr.c: Remove unused function
        arch: powerpc: kvm: book3s.c: Remove some unused functions
        arch: powerpc: kvm: book3s_32_mmu.c: Remove unused function
        KVM: PPC: Book3S HV: Check wait conditions before sleeping in kvmppc_vcore_blocked
        KVM: PPC: Book3S HV: ptes are big endian
        KVM: PPC: Book3S HV: Fix inaccuracies in ICP emulation for H_IPI
        KVM: PPC: Book3S HV: Fix KSM memory corruption
        KVM: PPC: Book3S HV: Fix an issue where guest is paused on receiving HMI
        KVM: PPC: Book3S HV: Fix computation of tlbie operand
        KVM: PPC: Book3S HV: Add missing HPTE unlock
        KVM: PPC: BookE: Improve irq inject tracepoint
        arm/arm64: KVM: Require in-kernel vgic for the arch timers
        ...
      66dcff86
    • Alexander Graf's avatar
      KVM: PPC: E500: Compile fix in this_cpu_write · 91ed9e8a
      Alexander Graf authored
      Commit 69111bac ("powerpc: Replace __get_cpu_var uses") introduced
      compile breakage to the e500 target by introducing invalid automatically
      created C syntax.
      
      Fix up the breakage and make the code compile again.
      Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      91ed9e8a
  2. 18 Dec, 2014 17 commits
  3. 17 Dec, 2014 3 commits
    • Anton Blanchard's avatar
      KVM: PPC: Book3S: Enable in-kernel XICS emulation by default · 476ce5ef
      Anton Blanchard authored
      The in-kernel XICS emulation is faster than doing it all in QEMU
      and it has got a lot of testing, so enable it by default.
      Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
      Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
      476ce5ef
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace · 87c31b39
      Linus Torvalds authored
      Pull user namespace related fixes from Eric Biederman:
       "As these are bug fixes almost all of thes changes are marked for
        backporting to stable.
      
        The first change (implicitly adding MNT_NODEV on remount) addresses a
        regression that was created when security issues with unprivileged
        remount were closed.  I go on to update the remount test to make it
        easy to detect if this issue reoccurs.
      
        Then there are a handful of mount and umount related fixes.
      
        Then half of the changes deal with the a recently discovered design
        bug in the permission checks of gid_map.  Unix since the beginning has
        allowed setting group permissions on files to less than the user and
        other permissions (aka ---rwx---rwx).  As the unix permission checks
        stop as soon as a group matches, and setgroups allows setting groups
        that can not later be dropped, results in a situtation where it is
        possible to legitimately use a group to assign fewer privileges to a
        process.  Which means dropping a group can increase a processes
        privileges.
      
        The fix I have adopted is that gid_map is now no longer writable
        without privilege unless the new file /proc/self/setgroups has been
        set to permanently disable setgroups.
      
        The bulk of user namespace using applications even the applications
        using applications using user namespaces without privilege remain
        unaffected by this change.  Unfortunately this ix breaks a couple user
        space applications, that were relying on the problematic behavior (one
        of which was tools/selftests/mount/unprivileged-remount-test.c).
      
        To hopefully prevent needing a regression fix on top of my security
        fix I rounded folks who work with the container implementations mostly
        like to be affected and encouraged them to test the changes.
      
          > So far nothing broke on my libvirt-lxc test bed. :-)
          > Tested with openSUSE 13.2 and libvirt 1.2.9.
          > Tested-by: Richard Weinberger <richard@nod.at>
      
          > Tested on Fedora20 with libvirt 1.2.11, works fine.
          > Tested-by: Chen Hanxiao <chenhanxiao@cn.fujitsu.com>
      
          > Ok, thanks - yes, unprivileged lxc is working fine with your kernels.
          > Just to be sure I was testing the right thing I also tested using
          > my unprivileged nsexec testcases, and they failed on setgroup/setgid
          > as now expected, and succeeded there without your patches.
          > Tested-by: Serge Hallyn <serge.hallyn@ubuntu.com>
      
          > I tested this with Sandstorm.  It breaks as is and it works if I add
          > the setgroups thing.
          > Tested-by: Andy Lutomirski <luto@amacapital.net> # breaks things as designed :("
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
        userns: Unbreak the unprivileged remount tests
        userns; Correct the comment in map_write
        userns: Allow setting gid_maps without privilege when setgroups is disabled
        userns: Add a knob to disable setgroups on a per user namespace basis
        userns: Rename id_map_mutex to userns_state_mutex
        userns: Only allow the creator of the userns unprivileged mappings
        userns: Check euid no fsuid when establishing an unprivileged uid mapping
        userns: Don't allow unprivileged creation of gid mappings
        userns: Don't allow setgroups until a gid mapping has been setablished
        userns: Document what the invariant required for safe unprivileged mappings.
        groups: Consolidate the setgroups permission checks
        mnt: Clear mnt_expire during pivot_root
        mnt: Carefully set CL_UNPRIVILEGED in clone_mnt
        mnt: Move the clear of MNT_LOCKED from copy_tree to it's callers.
        umount: Do not allow unmounting rootfs.
        umount: Disallow unprivileged mount force
        mnt: Update unprivileged remount test
        mnt: Implicitly add MNT_NODEV on remount when it was implicitly added by mount
      87c31b39
    • Marcel Holtmann's avatar
      Bluetooth: Fix bug with filter in service discovery optimization · ea8ae251
      Marcel Holtmann authored
      The optimization for filtering out extended inquiry results, advertising
      reports or scan response data based on provided UUID list has a logic
      bug. In case no match is found in the advertising data, the scan
      response is ignored and not checked against the filter. This will lead
      to events being filtered wrongly.
      
      Change the code to actually only drop the events when the scan response
      data is not present. If it is present, it needs to be checked against
      the provided filter.
      
      The patch is a bit more complex than it needs to be. That is because
      it also fixes this compiler warning that some gcc versions produce.
      
        CC      net/bluetooth/mgmt.o
      net/bluetooth/mgmt.c: In function ‘mgmt_device_found’:
      net/bluetooth/mgmt.c:7028:7: warning: ‘match’ may be used uninitialized in this function [-Wmaybe-uninitialized]
        bool match;
             ^
      
      It seems that gcc can not clearly figure out the context of the match
      variable. So just change the branches for the extended inquiry response
      and advertising data around so that it is clear.
      Reported-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
      Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
      Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
      ea8ae251