1. 29 Oct, 2014 7 commits
  2. 28 Oct, 2014 14 commits
    • Nishanth Aravamudan's avatar
      powerpc/numa: ensure per-cpu NUMA mappings are correct on topology update · 2c0a33f9
      Nishanth Aravamudan authored
      We received a report of warning in kernel/sched/core.c where the sched
      group was NULL on an LPAR after a topology update. This seems to occur
      because after the topology update has moved the CPUs, cpu_to_node is
      returning the old value still, which ends up breaking the consistency of
      the NUMA topology in the per-cpu maps. Ensure that we update the per-cpu
      fields when we re-map CPUs.
      Signed-off-by: default avatarNishanth Aravamudan <nacc@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      2c0a33f9
    • Nishanth Aravamudan's avatar
      powerpc/numa: use cached value of update->cpu in update_cpu_topology · 49f8d8c0
      Nishanth Aravamudan authored
      There isn't any need to keep referring to update->cpu, as we've already
      checked cpu == update->cpu at this point.
      Signed-off-by: default avatarNishanth Aravamudan <nacc@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      49f8d8c0
    • Linus Torvalds's avatar
      Merge branch 'for-3.18' of git://linux-nfs.org/~bfields/linux · 9f76628d
      Linus Torvalds authored
      Pull two nfsd fixes from Bruce Fields:
       "One regression from the 3.16 xdr rewrite, one an older bug exposed by
        a separate bug in the client's new SEEK code"
      
      * 'for-3.18' of git://linux-nfs.org/~bfields/linux:
        nfsd4: fix crash on unknown operation number
        nfsd4: fix response size estimation for OP_SEQUENCE
      9f76628d
    • Linus Torvalds's avatar
      Merge tag 'trace-fixes-v3.18-rc1' of... · 6234056e
      Linus Torvalds authored
      Merge tag 'trace-fixes-v3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
      
      Pull ftrace trampoline accounting fixes from Steven Rostedt:
       "Adding the new code for 3.19, I discovered a couple of minor bugs with
        the accounting of the ftrace_ops trampoline logic.
      
        One was that the old hash was not updated before calling the modify
        code for an ftrace_ops.  The second bug was what let the first bug go
        unnoticed, as the update would check the current hash for all
        ftrace_ops (where it should only check the old hash for modified
        ones).  This let things work when only one ftrace_ops was registered
        to a function, but could break if more than one was registered
        depending on the order of the look ups.
      
        The worse thing that can happen if this bug triggers is that the
        ftrace self checks would find an anomaly and shut itself down"
      
      * tag 'trace-fixes-v3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        ftrace: Fix checking of trampoline ftrace_ops in finding trampoline
        ftrace: Set ops->old_hash on modifying what an ops hooks to
      6234056e
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm · 6e2028aa
      Linus Torvalds authored
      Pull ARM fixes from Russell King:
       "A couple of ARM fixes.
      
        We fix some printk formats for ptrdiff_t quantities which cause GCC
        4.9 to complain, and we also blacklist known buggy GCC 4.8.x compilers
        as their miscompilation is serious enough to cause filesystem
        corruption, even through many distros have fixed their versions"
      
      * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
        ARM: fix some printk formats
        ARM: Blacklist GCC 4.8.0 to GCC 4.8.2 - PR58854
      6e2028aa
    • Will Deacon's avatar
      zap_pte_range: update addr when forcing flush after TLB batching faiure · ce9ec37b
      Will Deacon authored
      When unmapping a range of pages in zap_pte_range, the page being
      unmapped is added to an mmu_gather_batch structure for asynchronous
      freeing. If we run out of space in the batch structure before the range
      has been completely unmapped, then we break out of the loop, force a
      TLB flush and free the pages that we have batched so far. If there are
      further pages to unmap, then we resume the loop where we left off.
      
      Unfortunately, we forget to update addr when we break out of the loop,
      which causes us to truncate the range being invalidated as the end
      address is exclusive. When we re-enter the loop at the same address, the
      page has already been freed and the pte_present test will fail, meaning
      that we do not reconsider the address for invalidation.
      
      This patch fixes the problem by incrementing addr by the PAGE_SIZE
      before breaking out of the loop on batch failure.
      Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      ce9ec37b
    • Tony Battersby's avatar
      lib/scatterlist: fix memory leak with scsi-mq · c21e59d8
      Tony Battersby authored
      Fix a memory leak with scsi-mq triggered by commands with large data
      transfer length.
      
      Fixes: c53c6d6a ("scatterlist: allow chaining to preallocated chunks")
      Cc: <stable@vger.kernel.org> # 3.17.x
      Signed-off-by: default avatarTony Battersby <tonyb@cybernetics.com>
      Reviewed-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      c21e59d8
    • Dmitry Kasatkin's avatar
      evm: check xattr value length and type in evm_inode_setxattr() · 3b1deef6
      Dmitry Kasatkin authored
      evm_inode_setxattr() can be called with no value. The function does not
      check the length so that following command can be used to produce the
      kernel oops: setfattr -n security.evm FOO. This patch fixes it.
      
      Changes in v3:
      * there is no reason to return different error codes for EVM_XATTR_HMAC
        and non EVM_XATTR_HMAC. Remove unnecessary test then.
      
      Changes in v2:
      * testing for validity of xattr type
      
      [ 1106.396921] BUG: unable to handle kernel NULL pointer dereference at           (null)
      [ 1106.398192] IP: [<ffffffff812af7b8>] evm_inode_setxattr+0x2a/0x48
      [ 1106.399244] PGD 29048067 PUD 290d7067 PMD 0
      [ 1106.399953] Oops: 0000 [#1] SMP
      [ 1106.400020] Modules linked in: bridge stp llc evdev serio_raw i2c_piix4 button fuse
      [ 1106.400020] CPU: 0 PID: 3635 Comm: setxattr Not tainted 3.16.0-kds+ #2936
      [ 1106.400020] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
      [ 1106.400020] task: ffff8800291a0000 ti: ffff88002917c000 task.ti: ffff88002917c000
      [ 1106.400020] RIP: 0010:[<ffffffff812af7b8>]  [<ffffffff812af7b8>] evm_inode_setxattr+0x2a/0x48
      [ 1106.400020] RSP: 0018:ffff88002917fd50  EFLAGS: 00010246
      [ 1106.400020] RAX: 0000000000000000 RBX: ffff88002917fdf8 RCX: 0000000000000000
      [ 1106.400020] RDX: 0000000000000000 RSI: ffffffff818136d3 RDI: ffff88002917fdf8
      [ 1106.400020] RBP: ffff88002917fd68 R08: 0000000000000000 R09: 00000000003ec1df
      [ 1106.400020] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8800438a0a00
      [ 1106.400020] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
      [ 1106.400020] FS:  00007f7dfa7d7740(0000) GS:ffff88005da00000(0000) knlGS:0000000000000000
      [ 1106.400020] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [ 1106.400020] CR2: 0000000000000000 CR3: 000000003763e000 CR4: 00000000000006f0
      [ 1106.400020] Stack:
      [ 1106.400020]  ffff8800438a0a00 ffff88002917fdf8 0000000000000000 ffff88002917fd98
      [ 1106.400020]  ffffffff812a1030 ffff8800438a0a00 ffff88002917fdf8 0000000000000000
      [ 1106.400020]  0000000000000000 ffff88002917fde0 ffffffff8116d08a ffff88002917fdc8
      [ 1106.400020] Call Trace:
      [ 1106.400020]  [<ffffffff812a1030>] security_inode_setxattr+0x5d/0x6a
      [ 1106.400020]  [<ffffffff8116d08a>] vfs_setxattr+0x6b/0x9f
      [ 1106.400020]  [<ffffffff8116d1e0>] setxattr+0x122/0x16c
      [ 1106.400020]  [<ffffffff811687e8>] ? mnt_want_write+0x21/0x45
      [ 1106.400020]  [<ffffffff8114d011>] ? __sb_start_write+0x10f/0x143
      [ 1106.400020]  [<ffffffff811687e8>] ? mnt_want_write+0x21/0x45
      [ 1106.400020]  [<ffffffff811687c0>] ? __mnt_want_write+0x48/0x4f
      [ 1106.400020]  [<ffffffff8116d3e6>] SyS_setxattr+0x6e/0xb0
      [ 1106.400020]  [<ffffffff81529da9>] system_call_fastpath+0x16/0x1b
      [ 1106.400020] Code: c3 0f 1f 44 00 00 55 48 89 e5 41 55 49 89 d5 41 54 49 89 fc 53 48 89 f3 48 c7 c6 d3 36 81 81 48 89 df e8 18 22 04 00 85 c0 75 07 <41> 80 7d 00 02 74 0d 48 89 de 4c 89 e7 e8 5a fe ff ff eb 03 83
      [ 1106.400020] RIP  [<ffffffff812af7b8>] evm_inode_setxattr+0x2a/0x48
      [ 1106.400020]  RSP <ffff88002917fd50>
      [ 1106.400020] CR2: 0000000000000000
      [ 1106.428061] ---[ end trace ae08331628ba3050 ]---
      Reported-by: default avatarJan Kara <jack@suse.cz>
      Signed-off-by: default avatarDmitry Kasatkin <d.kasatkin@samsung.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarMimi Zohar <zohar@linux.vnet.ibm.com>
      3b1deef6
    • Dmitry Kasatkin's avatar
      ima: check xattr value length and type in the ima_inode_setxattr() · a48fda9d
      Dmitry Kasatkin authored
      ima_inode_setxattr() can be called with no value. Function does not
      check the length so that following command can be used to produce
      kernel oops: setfattr -n security.ima FOO. This patch fixes it.
      
      Changes in v3:
      * for stable reverted "allow setting hash only in fix or log mode"
        It will be a separate patch.
      
      Changes in v2:
      * testing validity of xattr type
      * allow setting hash only in fix or log mode (Mimi)
      
      [  261.562522] BUG: unable to handle kernel NULL pointer dereference at           (null)
      [  261.564109] IP: [<ffffffff812af272>] ima_inode_setxattr+0x3e/0x5a
      [  261.564109] PGD 3112f067 PUD 42965067 PMD 0
      [  261.564109] Oops: 0000 [#1] SMP
      [  261.564109] Modules linked in: bridge stp llc evdev serio_raw i2c_piix4 button fuse
      [  261.564109] CPU: 0 PID: 3299 Comm: setxattr Not tainted 3.16.0-kds+ #2924
      [  261.564109] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
      [  261.564109] task: ffff8800428c2430 ti: ffff880042be0000 task.ti: ffff880042be0000
      [  261.564109] RIP: 0010:[<ffffffff812af272>]  [<ffffffff812af272>] ima_inode_setxattr+0x3e/0x5a
      [  261.564109] RSP: 0018:ffff880042be3d50  EFLAGS: 00010246
      [  261.564109] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000015
      [  261.564109] RDX: 0000001500000000 RSI: 0000000000000000 RDI: ffff8800375cc600
      [  261.564109] RBP: ffff880042be3d68 R08: 0000000000000000 R09: 00000000004d6256
      [  261.564109] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88002149ba00
      [  261.564109] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
      [  261.564109] FS:  00007f6c1e219740(0000) GS:ffff88005da00000(0000) knlGS:0000000000000000
      [  261.564109] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [  261.564109] CR2: 0000000000000000 CR3: 000000003b35a000 CR4: 00000000000006f0
      [  261.564109] Stack:
      [  261.564109]  ffff88002149ba00 ffff880042be3df8 0000000000000000 ffff880042be3d98
      [  261.564109]  ffffffff812a101b ffff88002149ba00 ffff880042be3df8 0000000000000000
      [  261.564109]  0000000000000000 ffff880042be3de0 ffffffff8116d08a ffff880042be3dc8
      [  261.564109] Call Trace:
      [  261.564109]  [<ffffffff812a101b>] security_inode_setxattr+0x48/0x6a
      [  261.564109]  [<ffffffff8116d08a>] vfs_setxattr+0x6b/0x9f
      [  261.564109]  [<ffffffff8116d1e0>] setxattr+0x122/0x16c
      [  261.564109]  [<ffffffff811687e8>] ? mnt_want_write+0x21/0x45
      [  261.564109]  [<ffffffff8114d011>] ? __sb_start_write+0x10f/0x143
      [  261.564109]  [<ffffffff811687e8>] ? mnt_want_write+0x21/0x45
      [  261.564109]  [<ffffffff811687c0>] ? __mnt_want_write+0x48/0x4f
      [  261.564109]  [<ffffffff8116d3e6>] SyS_setxattr+0x6e/0xb0
      [  261.564109]  [<ffffffff81529da9>] system_call_fastpath+0x16/0x1b
      [  261.564109] Code: 48 89 f7 48 c7 c6 58 36 81 81 53 31 db e8 73 27 04 00 85 c0 75 28 bf 15 00 00 00 e8 8a a5 d9 ff 84 c0 75 05 83 cb ff eb 15 31 f6 <41> 80 7d 00 03 49 8b 7c 24 68 40 0f 94 c6 e8 e1 f9 ff ff 89 d8
      [  261.564109] RIP  [<ffffffff812af272>] ima_inode_setxattr+0x3e/0x5a
      [  261.564109]  RSP <ffff880042be3d50>
      [  261.564109] CR2: 0000000000000000
      [  261.599998] ---[ end trace 39a89a3fc267e652 ]---
      Reported-by: default avatarJan Kara <jack@suse.cz>
      Signed-off-by: default avatarDmitry Kasatkin <d.kasatkin@samsung.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarMimi Zohar <zohar@linux.vnet.ibm.com>
      a48fda9d
    • Ian Munsie's avatar
      cxl: Fix PSL error due to duplicate segment table entries · eb01d4c2
      Ian Munsie authored
      In certain circumstances the PSL (Power Service Layer, which provides
      translation services for CXL hardware) can send an interrupt for a
      segment miss that the kernel has already handled. This can happen if
      multiple translations for the same segment are queued in the PSL before
      the kernel has restarted the first translation.
      
      The CXL driver does not expect this situation and does not check if a
      segment had already been handled. This could cause a duplicate segment
      table entry which in turn caused a PSL error taking down the card.
      
      This patch fixes the issue by checking for existing entries in the
      segment table that match the segment we are trying to insert, so as to
      avoid inserting duplicate entries.
      Signed-off-by: default avatarIan Munsie <imunsie@au1.ibm.com>
      Reviewed-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      eb01d4c2
    • Ian Munsie's avatar
      powerpc/mm: Use appropriate ESID mask in copro_calculate_slb() · 03f54397
      Ian Munsie authored
      This patch makes copro_calculate_slb() mask the ESID by the correct mask
      for 1T vs 256M segments.
      
      This has no effect by itself as the extra bits were ignored, but it
      makes debugging the segment table entries easier and means that we can
      directly compare the ESID values for duplicates without needing to worry
      about masking in the comparison.
      
      This will be used to simplify a comparison in the following patch.
      Signed-off-by: default avatarIan Munsie <imunsie@au1.ibm.com>
      Reviewed-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      03f54397
    • Ian Munsie's avatar
      cxl: Refactor cxl_load_segment() and find_free_sste() · b03a7f57
      Ian Munsie authored
      This moves the segment table hash calculation from cxl_load_segment()
      into find_free_sste() since that is the only place it is actually used.
      Signed-off-by: default avatarIan Munsie <imunsie@au1.ibm.com>
      Reviewed-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      b03a7f57
    • Ian Munsie's avatar
      cxl: Disable secondary hash in segment table · 5100a9d6
      Ian Munsie authored
      This patch simplifies the process of finding a free segment table entry
      by disabling the secondary hash. This reduces the number of possible
      entries in the segment table for a given address from 16 to 8.
      
      Due to the large segment sizes we use it is extremely unlikely that the
      secondary hash would ever have been used in practice, so this should not
      have any negative impacts and may even improve performance due to the
      reduced number of comparisons that software & hardware need to perform.
      
      This patch clears the SC bit in the hardware's state register
      (CXL_PSL_SR_An) to disable the secondary hash in the hardware since we
      can no longer fill out entries using it.
      Signed-off-by: default avatarIan Munsie <imunsie@au1.ibm.com>
      Reviewed-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      5100a9d6
    • Michael Ellerman's avatar
      Revert "powerpc/powernv: Fix endian bug in LPC bus debugfs accessors" · bf19edd2
      Michael Ellerman authored
      This reverts commit bf7588a0.
      
      Ben says although the code is not correct "[this] fix was completely
      wrong and does more damages than it fixes things."
      Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      bf19edd2
  3. 27 Oct, 2014 7 commits
  4. 26 Oct, 2014 4 commits
    • Linus Torvalds's avatar
      Linux 3.18-rc2 · cac7f242
      Linus Torvalds authored
      cac7f242
    • Linus Torvalds's avatar
      Merge tag 'armsoc-for-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · 88e23761
      Linus Torvalds authored
      Pull ARM SoC fixes from Olof Johansson:
       "Another week, another small batch of fixes.
      
        Most of these make zynq, socfpga and sunxi platforms work a bit
        better:
      
         - due to new requirements for regulators, DWMMC on socfpga broke past
           v3.17
         - SMP spinup fix for socfpga
         - a few DT fixes for zynq
         - another option (FIXED_REGULATOR) for sunxi is needed that used to
           be selected by other options but no longer is.
         - a couple of small DT fixes for at91
         - ...and a couple for i.MX"
      
      * tag 'armsoc-for-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
        ARM: dts: imx28-evk: Let i2c0 run at 100kHz
        ARM: i.MX6: Fix "emi" clock name typo
        ARM: multi_v7_defconfig: enable CONFIG_MMC_DW_ROCKCHIP
        ARM: sunxi_defconfig: enable CONFIG_REGULATOR_FIXED_VOLTAGE
        ARM: dts: socfpga: Add a 3.3V fixed regulator node
        ARM: dts: socfpga: Fix SD card detect
        ARM: dts: socfpga: rename gpio nodes
        ARM: at91/dt: sam9263: fix PLLB frequencies
        power: reset: at91-reset: fix power down register
        MAINTAINERS: add atmel ssc driver maintainer entry
        arm: socfpga: fix fetching cpu1start_addr for SMP
        ARM: zynq: DT: trivial: Fix mc node
        ARM: zynq: DT: Add cadence watchdog node
        ARM: zynq: DT: Add missing reference for memory-controller
        ARM: zynq: DT: Add missing reference for ADC
        ARM: zynq: DT: Add missing address for L2 pl310
        ARM: zynq: DT: Remove 222 MHz OPP
        ARM: zynq: DT: Fix GEM register area size
      88e23761
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · d1e14f1d
      Linus Torvalds authored
      Pull vfs updates from Al Viro:
       "overlayfs merge + leak fix for d_splice_alias() failure exits"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        overlayfs: embed middle into overlay_readdir_data
        overlayfs: embed root into overlay_readdir_data
        overlayfs: make ovl_cache_entry->name an array instead of pointer
        overlayfs: don't hold ->i_mutex over opening the real directory
        fix inode leaks on d_splice_alias() failure exits
        fs: limit filesystem stacking depth
        overlay: overlay filesystem documentation
        overlayfs: implement show_options
        overlayfs: add statfs support
        overlay filesystem
        shmem: support RENAME_WHITEOUT
        ext4: support RENAME_WHITEOUT
        vfs: add RENAME_WHITEOUT
        vfs: add whiteout support
        vfs: export check_sticky()
        vfs: introduce clone_private_mount()
        vfs: export __inode_permission() to modules
        vfs: export do_splice_direct() to modules
        vfs: add i_op->dentry_open()
      d1e14f1d
    • Olof Johansson's avatar
      Merge tag 'imx-fixes-3.18' of... · efc176a8
      Olof Johansson authored
      Merge tag 'imx-fixes-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into fixes
      
      Merge "ARM: imx: fixes for 3.18" from Shawn Guo:
      
      The i.MX fixes for 3.18:
       - Revert one patch which increases I2C bus frequency on imx28-evk
       - Fix a typo on imx6q EIM clock name
      
      * tag 'imx-fixes-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
        ARM: dts: imx28-evk: Let i2c0 run at 100kHz
        ARM: i.MX6: Fix "emi" clock name typo
      Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
      efc176a8
  5. 25 Oct, 2014 6 commits
  6. 24 Oct, 2014 2 commits
    • Steven Rostedt (Red Hat)'s avatar
      ftrace: Fix checking of trampoline ftrace_ops in finding trampoline · 4fc40904
      Steven Rostedt (Red Hat) authored
      When modifying code, ftrace has several checks to make sure things
      are being done correctly. One of them is to make sure any code it
      modifies is exactly what it expects it to be before it modifies it.
      In order to do so with the new trampoline logic, it must be able
      to find out what trampoline a function is hooked to in order to
      see if the code that hooks to it is what's expected.
      
      The logic to find the trampoline from a record (accounting descriptor
      for a function that is hooked) needs to only look at the "old_hash"
      of an ops that is being modified. The old_hash is the list of function
      an ops is hooked to before its update. Since a record would only be
      pointing to an ops that is being modified if it was already hooked
      before.
      
      Currently, it can pick a modified ops based on its new functions it
      will be hooked to, and this picks the wrong trampoline and causes
      the check to fail, disabling ftrace.
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      
      ftrace: squash into ordering of ops for modification
      4fc40904
    • Steven Rostedt (Red Hat)'s avatar
      ftrace: Set ops->old_hash on modifying what an ops hooks to · 8252ecf3
      Steven Rostedt (Red Hat) authored
      The code that checks for trampolines when modifying function hooks
      tests against a modified ops "old_hash". But the ops old_hash pointer
      is not being updated before the changes are made, making it possible
      to not find the right hash to the callback and possibly causing
      ftrace to break in accounting and disable itself.
      
      Have the ops set its old_hash before the modifying takes place.
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      8252ecf3