Commit Graph

387685 Commits

Author SHA1 Message Date
Linus Torvalds 899dd38885 Grab bag of little fixes and enhancements:
* optional security enhancements
   * fix path coverage in MAINTAINERS
   * switch to using most used protocol and transport as default
   * clean up buffer dumps in trace code
 
 Held off on RDMA patches as they need to be cleaned up a bit, but
 will try to get the cleaned, checked, and pushed by mid-week.
 
 (attempt 2, hopefully this one won't screw up the history)
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Merge tag 'for-linus-3.11-merge-window-part-1' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs

Pull 9p update from Eric Van Hensbergen:
 "Grab bag of little fixes and enhancements:
  - optional security enhancements
  - fix path coverage in MAINTAINERS
  - switch to using most used protocol and transport as default
  - clean up buffer dumps in trace code

  Held off on RDMA patches as they need to be cleaned up a bit, but will
  try to get the cleaned, checked, and pushed by mid-week"

* tag 'for-linus-3.11-merge-window-part-1' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  9p: Add rest of 9p files to MAINTAINERS entry
  9p: trace: use %*ph to dump buffer
  net/9p: Handle error in zero copy request correctly for 9p2000.u
  net/9p: Use virtio transpart as the default transport
  net/9p: Make 9P2000.L the default protocol for 9p file system
2013-07-09 12:55:13 -07:00
Jonas Gorski 785bf6f790 net: mv643xx_eth: do not use port number as platform device id
The port number is only local to the ethernet block, not global, so
there can be two ethernet blocks both using the same port, like
kirkwood with both using port 0.

Fix this by using the array index offset for the allocated platform
devices as the id.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-09 12:51:47 -07:00
Daniel Borkmann 8c2f414ad1 net: sctp: confirm route during forward progress
This fix has been proposed originally by Vlad Yasevich. He says:

  When SCTP makes forward progress (receives a SACK that acks new chunks,
  renegs, or answeres 0-window probes) or when HB-ACK arrives, mark
  the route as confirmed so we don't unnecessarily send NUD probes.

Having a simple SCTP client/server that exchange data chunks every 1sec,
without this patch ARP requests are sent periodically every 40-60sec.
With this fix applied, an ARP request is only done once right at the
"session" beginning. Also, when clearing the related ARP cache entry
manually during the session, a new request is correctly done. I have
only "backported" this to net-next and tested that it works, so full
credit goes to Vlad.

Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-09 12:49:56 -07:00
David S. Miller e1d6fbc3de virtio_net: fix race in RX VQ processing
Michael S. Tsirkin says:

====================
Jason Wang reported a race in RX VQ processing:
virtqueue_enable_cb is called outside napi lock,
violating virtio serialization rules.
The race has been there from day 1, but it got especially nasty in 3.0
when commit a5c262c5fd
"virtio_ring: support event idx feature"
added more dependency on vq state.

Please review, and consider for 3.11 and stable.

Changes from v1:
	- Added Jason's Tested-by tag
	- minor coding style fix
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-09 12:45:43 -07:00
Michael S. Tsirkin cbdadbbf0c virtio_net: fix race in RX VQ processing
virtio net called virtqueue_enable_cq on RX path after napi_complete, so
with NAPI_STATE_SCHED clear - outside the implicit napi lock.
This violates the requirement to synchronize virtqueue_enable_cq wrt
virtqueue_add_buf.  In particular, used event can move backwards,
causing us to lose interrupts.
In a debug build, this can trigger panic within START_USE.

Jason Wang reports that he can trigger the races artificially,
by adding udelay() in virtqueue_enable_cb() after virtio_mb().

However, we must call napi_complete to clear NAPI_STATE_SCHED before
polling the virtqueue for used buffers, otherwise napi_schedule_prep in
a callback will fail, causing us to lose RX events.

To fix, call virtqueue_enable_cb_prepare with NAPI_STATE_SCHED
set (under napi lock), later call virtqueue_poll with
NAPI_STATE_SCHED clear (outside the lock).

Reported-by: Jason Wang <jasowang@redhat.com>
Tested-by: Jason Wang <jasowang@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-09 12:45:37 -07:00
Michael S. Tsirkin cc229884d3 virtio: support unlocked queue poll
This adds a way to check ring empty state after enable_cb outside any
locks. Will be used by virtio_net.

Note: there's room for more optimization: caller is likely to have a
memory barrier already, which means we might be able to get rid of a
barrier here.  Deferring this optimization until we do some
benchmarking.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-09 12:45:37 -07:00
Jongsung Kim 01276ed242 net/cadence/macb: fix bug/typo in extracting gem_irq_read_clear bit
Signed-off-by: Jongsung Kim <neidhard.kim@lge.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-09 12:43:16 -07:00
Geert Uytterhoeven b78ba72cda Documentation: Fix references to defunct linux-net@vger.kernel.org
linux-net@vger.kernel.org was replaced by netdev@oss.sgi.com was replaced
by netdev@vger.kernel.org.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-09 12:42:19 -07:00
Linus Torvalds 9a5889ae1c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph updates from Sage Weil:
 "There is some follow-on RBD cleanup after the last window's code drop,
  a series from Yan fixing multi-mds behavior in cephfs, and then a
  sprinkling of bug fixes all around.  Some warnings, sleeping while
  atomic, a null dereference, and cleanups"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (36 commits)
  libceph: fix invalid unsigned->signed conversion for timespec encoding
  libceph: call r_unsafe_callback when unsafe reply is received
  ceph: fix race between cap issue and revoke
  ceph: fix cap revoke race
  ceph: fix pending vmtruncate race
  ceph: avoid accessing invalid memory
  libceph: Fix NULL pointer dereference in auth client code
  ceph: Reconstruct the func ceph_reserve_caps.
  ceph: Free mdsc if alloc mdsc->mdsmap failed.
  ceph: remove sb_start/end_write in ceph_aio_write.
  ceph: avoid meaningless calling ceph_caps_revoking if sync_mode == WB_SYNC_ALL.
  ceph: fix sleeping function called from invalid context.
  ceph: move inode to proper flushing list when auth MDS changes
  rbd: fix a couple warnings
  ceph: clear migrate seq when MDS restarts
  ceph: check migrate seq before changing auth cap
  ceph: fix race between page writeback and truncate
  ceph: reset iov_len when discarding cap release messages
  ceph: fix cap release race
  libceph: fix truncate size calculation
  ...
2013-07-09 12:39:10 -07:00
Linus Torvalds e3a0dd98e1 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs update from Chris Mason:
 "These are the usual mixture of bugs, cleanups and performance fixes.
  Miao has some really nice tuning of our crc code as well as our
  transaction commits.

  Josef is peeling off more and more problems related to early enospc,
  and has a number of important bug fixes in here too"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (81 commits)
  Btrfs: wait ordered range before doing direct io
  Btrfs: only do the tree_mod_log_free_eb if this is our last ref
  Btrfs: hold the tree mod lock in __tree_mod_log_rewind
  Btrfs: make backref walking code handle skinny metadata
  Btrfs: fix crash regarding to ulist_add_merge
  Btrfs: fix several potential problems in copy_nocow_pages_for_inode
  Btrfs: cleanup the code of copy_nocow_pages_for_inode()
  Btrfs: fix oops when recovering the file data by scrub function
  Btrfs: make the chunk allocator completely tree lockless
  Btrfs: cleanup orphaned root orphan item
  Btrfs: fix wrong mirror number tuning
  Btrfs: cleanup redundant code in btrfs_submit_direct()
  Btrfs: remove btrfs_sector_sum structure
  Btrfs: check if we can nocow if we don't have data space
  Btrfs: stop using try_to_writeback_inodes_sb_nr to flush delalloc
  Btrfs: use a percpu to keep track of possibly pinned bytes
  Btrfs: check for actual acls rather than just xattrs when caching no acl
  Btrfs: move btrfs_truncate_page to btrfs_cont_expand instead of btrfs_truncate
  Btrfs: optimize reada_for_balance
  Btrfs: optimize read_block_for_search
  ...
2013-07-09 12:33:09 -07:00
Eliezer Tamir 76b1e9b981 net/fs: change busy poll time accounting
Suggested by Linus:
Changed time accounting for busy-poll:
- Make it microsecond based.
- Use unsigned longs.
- Revert back to use time_after instead of time_in_range.
Reorder poll/select busy loop conditions:
- Clear busy_flag after one time we can't busy-poll.
- Only init busy_end if we actually are going to busy-poll.
Added one more missing need_resched() test.

Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-09 12:33:04 -07:00
Linus Torvalds da89bd213f xfs: update for 3.11-rc1
- part of the work to allow project quotas and group quotas to
   be used together
 - inode change count
 - inode create transaction
 - block queue plugging in buffer readahead and bulkstat
 - ordered log vector support
 - removal of dead code in and around xfs_sync_inode_grab,
   xfs_ialloc_get_rec, XFS_MOUNT_RETERR, XFS_ALLOCFREE_LOG_RES,
   XFS_DIROP_LOG_RES, xfs_chash, ctl_table, and xfs_growfs_data_private
 - don't keep silent if sunit/swidth can not be changed via mount
 - fix a leak of remote symlink blocks into the filesystem when
   xattrs are used on symlinks
 - fix for fiemap to return FIEMAP_EXTENT_UNKOWN flag on delay extents
 - part of a fix for xfs_fsr
 - disable speculative preallocation with small files
 - performance improvements for inode creates and deletes
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Merge tag 'for-linus-v3.11-rc1' of git://oss.sgi.com/xfs/xfs

Pull xfs update from Ben Myers:
 "This includes several bugfixes, part of the work for project quotas
  and group quotas to be used together, performance improvements for
  inode creation/deletion, buffer readahead, and bulkstat,
  implementation of the inode change count, an inode create transaction,
  and the removal of a bunch of dead code.

  There are also some duplicate commits that you already have from the
  3.10-rc series.

   - part of the work to allow project quotas and group quotas to be
     used together
   - inode change count
   - inode create transaction
   - block queue plugging in buffer readahead and bulkstat
   - ordered log vector support
   - removal of dead code in and around xfs_sync_inode_grab,
     xfs_ialloc_get_rec, XFS_MOUNT_RETERR, XFS_ALLOCFREE_LOG_RES,
     XFS_DIROP_LOG_RES, xfs_chash, ctl_table, and
     xfs_growfs_data_private
   - don't keep silent if sunit/swidth can not be changed via mount
   - fix a leak of remote symlink blocks into the filesystem when xattrs
     are used on symlinks
   - fix for fiemap to return FIEMAP_EXTENT_UNKOWN flag on delay extents
   - part of a fix for xfs_fsr
   - disable speculative preallocation with small files
   - performance improvements for inode creates and deletes"

* tag 'for-linus-v3.11-rc1' of git://oss.sgi.com/xfs/xfs: (61 commits)
  xfs: Remove incore use of XFS_OQUOTA_ENFD and XFS_OQUOTA_CHKD
  xfs: Change xfs_dquot_acct to be a 2-dimensional array
  xfs: Code cleanup and removal of some typedef usage
  xfs: Replace macro XFS_DQ_TO_QIP with a function
  xfs: Replace macro XFS_DQUOT_TREE with a function
  xfs: Define a new function xfs_is_quota_inode()
  xfs: implement inode change count
  xfs: Use inode create transaction
  xfs: Inode create item recovery
  xfs: Inode create transaction reservations
  xfs: Inode create log items
  xfs: Introduce an ordered buffer item
  xfs: Introduce ordered log vector support
  xfs: xfs_ifree doesn't need to modify the inode buffer
  xfs: don't do IO when creating an new inode
  xfs: don't use speculative prealloc for small files
  xfs: plug directory buffer readahead
  xfs: add pluging for bulkstat readahead
  xfs: Remove dead function prototype xfs_sync_inode_grab()
  xfs: Remove the left function variable from xfs_ialloc_get_rec()
  ...
2013-07-09 12:29:12 -07:00
Josh Durgin 8b8cf8917f libceph: fix invalid unsigned->signed conversion for timespec encoding
__kernel_time_t is a long, which cannot hold a U32_MAX on 32-bit
architectures.  Just drop this check as it has limited value.

This fixes a crash like:

[  957.905812] kernel BUG at /srv/autobuild-ceph/gitbuilder.git/build/include/linux/ceph/decode.h:164!
[  957.914849] Internal error: Oops - BUG: 0 [#1] SMP ARM
[  957.919978] Modules linked in: rbd libceph libcrc32c ipmi_devintf ipmi_si ipmi_msghandler nfsd nfs_acl auth_rpcgss nfs fscache lockd sunrpc
[  957.932547] CPU: 1    Tainted: G        W     (3.9.0-ceph-19bb6a83-highbank #1)
[  957.939881] PC is at ceph_osdc_build_request+0x8c/0x4f8 [libceph]
[  957.945967] LR is at 0xec520904
[  957.949103] pc : [<bf13e76c>]    lr : [<ec520904>]    psr: 20000153
[  957.949103] sp : ec753df8  ip : 00000001  fp : ec53e100
[  957.960571] r10: ebef25c0  r9 : ec5fa400  r8 : ecbcc000
[  957.965788] r7 : 00000000  r6 : 00000000  r5 : ffffffff  r4 : 00000020
[  957.972307] r3 : 51cc8143  r2 : ec520900  r1 : ec753e58  r0 : ec520908
[  957.978827] Flags: nzCv  IRQs on  FIQs off  Mode SVC_32  ISA ARM  Segment user
[  957.986039] Control: 10c5387d  Table: 2c59c04a  DAC: 00000015
[  957.991777] Process rbd (pid: 2138, stack limit = 0xec752238)
[  957.997514] Stack: (0xec753df8 to 0xec754000)
[  958.001864] 3de0:                                                       00000001 00000001
[  958.010032] 3e00: 00000001 bf139744 ecbcc000 ec55a0a0 00000024 00000000 ebef25c0 fffffffe
[  958.018204] 3e20: ffffffff 00000000 00000000 00000001 ec5fa400 ebef25c0 ec53e100 bf166b68
[  958.026377] 3e40: 00000000 0000220f fffffffe ffffffff ec753e58 bf13ff24 51cc8143 05b25ed2
[  958.034548] 3e60: 00000001 00000000 00000000 bf1688d4 00000001 00000000 00000000 00000000
[  958.042720] 3e80: 00000001 00000060 ec5fa400 ed53d200 ed439600 ed439300 00000001 00000060
[  958.050888] 3ea0: ec5fa400 ed53d200 00000000 bf16a320 00000000 ec53e100 00000040 ec753eb8
[  958.059059] 3ec0: ec51df00 ed53d7c0 ed53d200 ed53d7c0 00000000 ed53d7c0 ec5fa400 bf16ed70
[  958.067230] 3ee0: 00000000 00000060 00000002 ed53d200 00000000 bf16acf4 ed53d7c0 ec752000
[  958.075402] 3f00: ed980e50 e954f5d8 00000000 00000060 ed53d240 ed53d258 ec753f80 c04f44a8
[  958.083574] 3f20: edb7910c ec664700 01ade920 c02e4c44 00000060 c016b3dc ec51de40 01adfb84
[  958.091745] 3f40: 00000060 ec752000 ec753f80 ec752000 00000060 c0108444 00000007 ec51de48
[  958.099914] 3f60: ed0eb8c0 00000000 00000000 ec51de40 01adfb84 00000001 00000060 c0108858
[  958.108085] 3f80: 00000000 00000000 51cc8143 00000060 01adfb84 00000007 00000004 c000dd68
[  958.116257] 3fa0: 00000000 c000dbc0 00000060 01adfb84 00000007 01adfb84 00000060 01adfb80
[  958.124429] 3fc0: 00000060 01adfb84 00000007 00000004 beded1a8 00000000 01adf2f0 01ade920
[  958.132599] 3fe0: 00000000 beded180 b6811324 b6811334 800f0010 00000007 2e7f5821 2e7f5c21
[  958.140815] [<bf13e76c>] (ceph_osdc_build_request+0x8c/0x4f8 [libceph]) from [<bf166b68>] (rbd_osd_req_format_write+0x50/0x7c [rbd])
[  958.152739] [<bf166b68>] (rbd_osd_req_format_write+0x50/0x7c [rbd]) from [<bf1688d4>] (rbd_dev_header_watch_sync+0xe0/0x204 [rbd])
[  958.164486] [<bf1688d4>] (rbd_dev_header_watch_sync+0xe0/0x204 [rbd]) from [<bf16a320>] (rbd_dev_image_probe+0x23c/0x850 [rbd])
[  958.175967] [<bf16a320>] (rbd_dev_image_probe+0x23c/0x850 [rbd]) from [<bf16acf4>] (rbd_add+0x3c0/0x918 [rbd])
[  958.185975] [<bf16acf4>] (rbd_add+0x3c0/0x918 [rbd]) from [<c02e4c44>] (bus_attr_store+0x20/0x2c)
[  958.194850] [<c02e4c44>] (bus_attr_store+0x20/0x2c) from [<c016b3dc>] (sysfs_write_file+0x168/0x198)
[  958.203984] [<c016b3dc>] (sysfs_write_file+0x168/0x198) from [<c0108444>] (vfs_write+0x9c/0x170)
[  958.212768] [<c0108444>] (vfs_write+0x9c/0x170) from [<c0108858>] (sys_write+0x3c/0x70)
[  958.220768] [<c0108858>] (sys_write+0x3c/0x70) from [<c000dbc0>] (ret_fast_syscall+0x0/0x30)
[  958.229199] Code: e59d1058 e5913000 e3530000 ba000114 (e7f001f2)

CC: stable@vger.kernel.org  # 3.4+
Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
2013-07-09 12:18:06 -07:00
Linus Torvalds be0c5d8c0b NFS client updates for Linux 3.11
Feature highlights include:
 - Add basic client support for NFSv4.2
 - Add basic client support for Labeled NFS (selinux for NFSv4.2)
 - Fix the use of credentials in NFSv4.1 stateful operations, and
   add support for NFSv4.1 state protection.
 
 Bugfix highlights:
 - Fix another NFSv4 open state recovery race
 - Fix an NFSv4.1 back channel session regression
 - Various rpc_pipefs races
 - Fix another issue with NFSv3 auth negotiation
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Merge tag 'nfs-for-3.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:
 "Feature highlights include:
   - Add basic client support for NFSv4.2
   - Add basic client support for Labeled NFS (selinux for NFSv4.2)
   - Fix the use of credentials in NFSv4.1 stateful operations, and add
     support for NFSv4.1 state protection.

  Bugfix highlights:
   - Fix another NFSv4 open state recovery race
   - Fix an NFSv4.1 back channel session regression
   - Various rpc_pipefs races
   - Fix another issue with NFSv3 auth negotiation

  Please note that Labeled NFS does require some additional support from
  the security subsystem.  The relevant changesets have all been
  reviewed and acked by James Morris."

* tag 'nfs-for-3.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (54 commits)
  NFS: Set NFS_CS_MIGRATION for NFSv4 mounts
  NFSv4.1 Refactor nfs4_init_session and nfs4_init_channel_attrs
  nfs: have NFSv3 try server-specified auth flavors in turn
  nfs: have nfs_mount fake up a auth_flavs list when the server didn't provide it
  nfs: move server_authlist into nfs_try_mount_request
  nfs: refactor "need_mount" code out of nfs_try_mount
  SUNRPC: PipeFS MOUNT notification optimization for dying clients
  SUNRPC: split client creation routine into setup and registration
  SUNRPC: fix races on PipeFS UMOUNT notifications
  SUNRPC: fix races on PipeFS MOUNT notifications
  NFSv4.1 use pnfs_device maxcount for the objectlayout gdia_maxcount
  NFSv4.1 use pnfs_device maxcount for the blocklayout gdia_maxcount
  NFSv4.1 Fix gdia_maxcount calculation to fit in ca_maxresponsesize
  NFS: Improve legacy idmapping fallback
  NFSv4.1 end back channel session draining
  NFS: Apply v4.1 capabilities to v4.2
  NFSv4.1: Clean up layout segment comparison helper names
  NFSv4.1: layout segment comparison helpers should take 'const' parameters
  NFSv4: Move the DNS resolver into the NFSv4 module
  rpc_pipefs: only set rpc_dentry_ops if d_op isn't already set
  ...
2013-07-09 12:09:43 -07:00
Linus Torvalds 1f792dd176 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext3 fix and quota cleanup from Jan Kara:
 "A fix of ext3 error reporting from fsync and a quota cleanup"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  quota: Convert use of typedef ctl_table to struct ctl_table
  ext3: Fix fsync error handling after filesystem abort.
2013-07-09 12:08:43 -07:00
Linus Torvalds c75e24752c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull third set of VFS updates from Al Viro:
 "Misc stuff all over the place.  There will be one more pile in a
  couple of days"

This is an "evil merge" that also uses the new d_count helper in
fs/configfs/dir.c, missed by commit 84d08fa888 ("helper for reading
->d_count")

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  ncpfs: fix error return code in ncp_parse_options()
  locks: move file_lock_list to a set of percpu hlist_heads and convert file_lock_lock to an lglock
  seq_file: add seq_list_*_percpu helpers
  f2fs: fix readdir incorrectness
  mode_t whack-a-mole...
  lustre: kill the pointless wrapper
  helper for reading ->d_count
2013-07-09 11:26:44 -07:00
Eric Sandeen a69c7c0772 xfs: use XFS_BMAP_BMDR_SPACE vs. XFS_BROOT_SIZE_ADJ
XFS_BROOT_SIZE_ADJ is an undocumented macro which accounts for
the difference in size between the on-disk and in-core btree
root.  It's much clearer to just use the newly-added
XFS_BMAP_BMDR_SPACE macro which gives us the on-disk size
directly.

In one case, we must test that the if_broot exists before
applying the macro, however.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
2013-07-09 13:21:15 -05:00
Bart Van Assche 7a5ed75a78 fcoe: Reduce number of sparse warnings
Declare local variables and functions 'static'. This patch does not
change any functionality.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-07-09 11:19:00 -07:00
Mark Rustad d17efa001a fcoe: Stop fc_rport_priv structure leak
When repeatedly doing rmmod and modprobe on the ixgbe
driver while FCoE is active in a VN2VN configuration,
memory leaks would be discovered by kmemleak with the
following backtrace:

unreferenced object 0xffff88003d076000 (size 1024):
  comm "kworker/0:3", pid 2998, jiffies 4295436448 (age 1015.332s)
  hex dump (first 32 bytes):
    48 8a fe 6f 00 88 ff ff 00 00 00 00 00 00 00 00  H..o............
    01 00 00 00 02 00 00 00 7b ac 87 21 1b 00 00 10  ........{..!....
  backtrace:
    [<ffffffff814b308b>] kmemleak_alloc+0x5b/0xc0
    [<ffffffff8115c6e8>] __kmalloc+0xd8/0x1b0
    [<ffffffffa0216638>] fc_rport_create+0x48/0x1f0 [libfc]
    [<ffffffffa023cd86>] fcoe_ctlr_vn_add.isra.10+0x56/0x1a0 [libfcoe]
    [<ffffffffa023f440>] fcoe_ctlr_vn_recv+0x8b0/0xab0 [libfcoe]
    [<ffffffffa023fb06>] fcoe_ctlr_recv_work+0x4c6/0xf60 [libfcoe]
    [<ffffffff81067404>] process_one_work+0x1e4/0x4d0
    [<ffffffff81068def>] worker_thread+0x10f/0x380
    [<ffffffff8107019a>] kthread+0xea/0xf0
    [<ffffffff814d32ec>] ret_from_fork+0x7c/0xb0
    [<ffffffffffffffff>] 0xffffffffffffffff

This patch stops the leak of the fc_rport_priv structure.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Jack Morgan <jack.morgan@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-07-09 11:18:54 -07:00
Robert Love a2ceb1fbaa libfcoe: Fix meaningless log statement
ctlr_dev was initialized to NULL, and never re-assigned. This
caused the log statement to always report failure. This patch
removes the unused variable and fixes the log statement to always
report 'success', as that is what should be logged if the code
reaches this point.

Signed-off-by: Robert Love <robert.w.love@intel.com>
Tested-by: Jack Morgan <jack.morgan@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
2013-07-09 11:18:47 -07:00
Robert Love 3a2926054a libfc: Differentiate echange timer cancellation debug statements
There are two debug statements with the same output string regarding
echange timer cancellation. This patch simply changes the output of
one string so that they can be differentiated.

Signed-off-by: Robert Love <robert.w.love@intel.com>
Tested-by: Jack Morgan <jack.morgan@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
2013-07-09 11:18:41 -07:00
Robert Love 4a80f083dd libfc: Remove extra space in fc_exch_timer_cancel definition
Simply remove an extra space that violates coding style.

Signed-off-by: Robert Love <robert.w.love@intel.com>
Tested-by: Jack Morgan <jack.morgan@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
2013-07-09 11:18:33 -07:00
Yi Zou 418a8cfe69 fcoe: fix the link error status block sparse warnings
Both fcoe_fc_els_lesb and fc_els_lesb are in __be32 already, and both are
exactly the same size in bytes, with somewhat different member names to
reflect the fact the former is for Ethernet media the latter is for Fiber
Channel, so, remove conversion and use __be32 directly. This fixes the warning
from sparse check.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Tested-by: Jack Morgan <jack.morgan@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
2013-07-09 11:18:26 -07:00
Dan Carpenter 27daabd9b6 lib/scatterlist: error handling in __sg_alloc_table()
I was reviewing code which I suspected might allocate a zero size SG
table.  That will cause memory corruption.  Also we can't return before
doing the memset or we could end up using uninitialized memory in the
cleanup path.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:31 -07:00
Akinobu Mita a451751172 scsi_debug: fix do_device_access() with wrap around range
do_device_access() is a function that abstracts copying SG list from/to
ramdisk storage (fake_storep).

It must deal with the ranges exceeding actual fake_storep size, because
such ranges are valid if virtual_gb is set greater than zero, and they
should be treated as fake_storep is repeatedly mirrored up to virtual
size.

Unfortunately, it can't deal with the range which wraps around the end of
fake_storep.  A wrap around range is copied by two
sg_copy_{from,to}_buffer() calls, but sg_copy_{from,to}_buffer() can't
copy from/to in the middle of SG list, therefore the second call can't
copy correctly.

This fixes it by using sg_pcopy_{from,to}_buffer() that can copy from/to
the middle of SG list.

This also simplifies the assignment of sdb->resid in
fill_from_dev_buffer().  Because fill_from_dev_buffer() is now only called
once per command execution cycle.  So it is not necessary to take care to
decrease sdb->resid if fill_from_dev_buffer() is called more than once.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Douglas Gilbert <dgilbert@interlog.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:30 -07:00
Akinobu Mita d05257238f crypto: talitos: use sg_pcopy_to_buffer()
Use sg_pcopy_to_buffer() which is better than the function previously used.
Because it doesn't do kmap/kunmap for skipped pages.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Douglas Gilbert <dgilbert@interlog.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:30 -07:00
Akinobu Mita df642cea25 lib/scatterlist: introduce sg_pcopy_from_buffer() and sg_pcopy_to_buffer()
The only difference between sg_pcopy_{from,to}_buffer() and
sg_copy_{from,to}_buffer() is an additional argument that specifies the
number of bytes to skip the SG list before copying.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Douglas Gilbert <dgilbert@interlog.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Cc: Imre Deak <imre.deak@intel.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:30 -07:00
Akinobu Mita 1105200480 lib/scatterlist: factor out sg_miter_get_next_page() from sg_miter_next()
This patchset introduces sg_pcopy_from_buffer() and sg_pcopy_to_buffer(),
which copy data between a linear buffer and an SG list.

The only difference between sg_pcopy_{from,to}_buffer() and
sg_copy_{from,to}_buffer() is an additional argument that specifies the
number of bytes to skip the SG list before copying.

The main reason for introducing these functions is to fix a problem in
scsi_debug module.  And there is a local function in crypto/talitos
module, which can be replaced by sg_pcopy_to_buffer().

This patch:

sg_miter_get_next_page() is used to proceed page iterator to the next page
if necessary, and will be used to implement the variants of
sg_copy_{from,to}_buffer() later.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Douglas Gilbert <dgilbert@interlog.com>
Cc: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:30 -07:00
Chanho Min 0ea8530dcf crypto: add lz4 Cryptographic API
Add support for lz4 and lz4hc compression algorithm using the lib/lz4/*
codebase.

[akpm@linux-foundation.org: fix warnings]
Signed-off-by: Chanho Min <chanho.min@lge.com>
Cc: "Darrick J. Wong" <djwong@us.ibm.com>
Cc: Bob Pearson <rpearson@systemfabricworks.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Herbert Xu <herbert@gondor.hengli.com.au>
Cc: Yann Collet <yann.collet.73@gmail.com>
Cc: Kyungsik Lee <kyungsik.lee@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:30 -07:00
Chanho Min c72ac7a1a9 lib: add lz4 compressor module
This patchset is for supporting LZ4 compression and the crypto API using
it.

As shown below, the size of data is a little bit bigger but compressing
speed is faster under the enabled unaligned memory access.  We can use
lz4 de/compression through crypto API as well.  Also, It will be useful
for another potential user of lz4 compression.

lz4 Compression Benchmark:
Compiler: ARM gcc 4.6.4
ARMv7, 1 GHz based board
   Kernel: linux 3.4
   Uncompressed data Size: 101 MB
         Compressed Size  compression Speed
   LZO   72.1MB		  32.1MB/s, 33.0MB/s(UA)
   LZ4   75.1MB		  30.4MB/s, 35.9MB/s(UA)
   LZ4HC 59.8MB		   2.4MB/s,  2.5MB/s(UA)
- UA: Unaligned memory Access support
- Latest patch set for LZO applied

This patch:

Add support for LZ4 compression in the Linux Kernel.  LZ4 Compression APIs
for kernel are based on LZ4 implementation by Yann Collet and were changed
for kernel coding style.

LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
LZ4 source repository : http://code.google.com/p/lz4/
svn revision : r90

Two APIs are added:

lz4_compress() support basic lz4 compression whereas lz4hc_compress()
support high compression or CPU performance get lower but compression
ratio get higher.  Also, we require the pre-allocated working memory with
the defined size and destination buffer must be allocated with the size of
lz4_compressbound.

[akpm@linux-foundation.org: make lz4_compresshcctx() static]
Signed-off-by: Chanho Min <chanho.min@lge.com>
Cc: "Darrick J. Wong" <djwong@us.ibm.com>
Cc: Bob Pearson <rpearson@systemfabricworks.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Herbert Xu <herbert@gondor.hengli.com.au>
Cc: Yann Collet <yann.collet.73@gmail.com>
Cc: Kyungsik Lee <kyungsik.lee@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:30 -07:00
Kyungsik Lee f9b493ac9b arm: add support for LZ4-compressed kernel
Integrates the LZ4 decompression code to the arm pre-boot code.

Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Florian Fainelli <florian@openwrt.org>
Cc: Yann Collet <yann.collet.73@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:30 -07:00
Kyungsik Lee e76e1fdfa8 lib: add support for LZ4-compressed kernel
Add support for extracting LZ4-compressed kernel images, as well as
LZ4-compressed ramdisk images in the kernel boot process.

Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Florian Fainelli <florian@openwrt.org>
Cc: Yann Collet <yann.collet.73@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:30 -07:00
Kyungsik Lee cffb78b0e0 decompressor: add LZ4 decompressor module
Add support for LZ4 decompression in the Linux Kernel.  LZ4 Decompression
APIs for kernel are based on LZ4 implementation by Yann Collet.

Benchmark Results(PATCH v3)
Compiler: Linaro ARM gcc 4.6.2

1. ARMv7, 1.5GHz based board
   Kernel: linux 3.4
   Uncompressed Kernel Size: 14MB
        Compressed Size  Decompression Speed
   LZO  6.7MB            20.1MB/s, 25.2MB/s(UA)
   LZ4  7.3MB            29.1MB/s, 45.6MB/s(UA)

2. ARMv7, 1.7GHz based board
   Kernel: linux 3.7
   Uncompressed Kernel Size: 14MB
        Compressed Size  Decompression Speed
   LZO  6.0MB            34.1MB/s, 52.2MB/s(UA)
   LZ4  6.5MB            86.7MB/s
- UA: Unaligned memory Access support
- Latest patch set for LZO applied

This patch set is for adding support for LZ4-compressed Kernel.  LZ4 is a
very fast lossless compression algorithm and it also features an extremely
fast decoder [1].

But we have five of decompressors already and one question which does
arise, however, is that of where do we stop adding new ones?  This issue
had been discussed and came to the conclusion [2].

Russell King said that we should have:

 - one decompressor which is the fastest
 - one decompressor for the highest compression ratio
 - one popular decompressor (eg conventional gzip)

If we have a replacement one for one of these, then it should do exactly
that: replace it.

The benchmark shows that an 8% increase in image size vs a 66% increase
in decompression speed compared to LZO(which has been known as the
fastest decompressor in the Kernel).  Therefore the "fast but may not be
small" compression title has clearly been taken by LZ4 [3].

[1] http://code.google.com/p/lz4/
[2] http://thread.gmane.org/gmane.linux.kbuild.devel/9157
[3] http://thread.gmane.org/gmane.linux.kbuild.devel/9347

LZ4 homepage: http://fastcompression.blogspot.com/p/lz4.html
LZ4 source repository: http://code.google.com/p/lz4/

Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com>
Signed-off-by: Yann Collet <yann.collet.73@gmail.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:30 -07:00
Chanho Min 4df87bb7b6 lib: add weak clz/ctz functions
Some architectures need __c[lt]z[sd]i2() for __builtin_c[lt]z[ll] and
that causes a build failure.  They can be implemented using the
fls()/__ffs() and overridden by linking arch-specific versions may not
be implemented yet.

This is required by "lib: add lz4 compressor module".

Reference: https://lkml.org/lkml/2013/4/18/603

Signed-off-by: Chanho Min <chanho.min@lge.com>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: "Darrick J. Wong" <djwong@us.ibm.com>
Cc: Bob Pearson <rpearson@systemfabricworks.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Herbert Xu <herbert@gondor.hengli.com.au>
Cc: Yann Collet <yann.collet.73@gmail.com>
Cc: Kyungsik Lee <kyungsik.lee@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:30 -07:00
Robin Holt 1b3a5d02ee reboot: move arch/x86 reboot= handling to generic kernel
Merge together the unicore32, arm, and x86 reboot= command line
parameter handling.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:29 -07:00
Robin Holt 7b6d864b48 reboot: arm: change reboot_mode to use enum reboot_mode
Preparing to move the parsing of reboot= to generic kernel code forces
the change in reboot_mode handling to use the enum.

[akpm@linux-foundation.org: fix arch/arm/mach-socfpga/socfpga.c]
Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:29 -07:00
Robin Holt 16d6d5b00e reboot: arm: prepare reboot_mode for moving to generic kernel code
Prepare for the moving the parsing of reboot= to the generic kernel code
by making reboot_mode into a more generic form.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:29 -07:00
Robin Holt 5859194278 reboot: arm: remove unused restart_mode fields from some arm subarchs
These restart_mode fields are not used at all.  Remove them to make
moving the reboot= cmdline options to the general kernel easier.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:29 -07:00
Robin Holt c97a700851 reboot: unicore32: prepare reboot_mode for moving to generic kernel code
Prepare for the moving the parsing of reboot= to the generic kernel code
by making reboot_mode into a more generic form.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: H. Peter Anvin <hpa@zytor.com>
Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:29 -07:00
Robin Holt edf2b13946 reboot: x86: prepare reboot_mode for moving to generic kernel code
Prepare for the moving the parsing of reboot= to the generic kernel code
by making reboot_mode into a more generic form.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Miguel Boton <mboton.lkml@gmail.com>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:29 -07:00
Robin Holt 972ee83df8 reboot: checkpatch.pl the new kernel/reboot.c file
Get the new file to pass scripts/checkpatch.pl

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:29 -07:00
Robin Holt 15d94b8256 reboot: move shutdown/reboot related functions to kernel/reboot.c
This patch is preparatory.  It moves reboot related syscall, etc
functions from kernel/sys.c to kernel/reboot.c.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:29 -07:00
Robin Holt 0efbee7089 reboot: remove -stable friendly PF_THREAD_BOUND define
Remove the prior patch's #define for easier backporting to the stable
releases.

Signed-off-by: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:29 -07:00
Philippe De Muyter f8f066033b partitions/msdos: enumerate also AIX LVM partitions
Graft AIX partitions enumeration into partitions/msdos.c

There is already a AIX disks detection logic in msdos.c.  When an AIX disk
has been found, and if configured to, call the aix partitions recognizer.
This avoids removal of AIX disks protection from msdos.c, avoids code
duplication, and ensures that AIX partitions enumeration is called before
plain msdos partitions enumeration.

Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Cc: Karel Zak <kzak@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:28 -07:00
Philippe De Muyter 6ceea22bbb partitions: add aix lvm partition support files
Add partitions/aix.h and partitions/aix.c.

AIX LVM permits to make "logical volumes" which are made of multiple
slices of multiple disks.  The new code allows only access to the
"logical volumes" which are made of one slice on the probed disk, a
slice being a contiguous disk area.  The code also detects "logical
volumes" made of multiple slices on the probed disk, but can not
describe them to the partition layer, because the partition layer
generic code does not support that.  When such non-contiguous "logical
volumes" are detected, a diagnostic message is printed.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Cc: Karel Zak <kzak@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:28 -07:00
Philippe De Muyter 1d04f3c6ab partitions/msdos.c: end-of-line whitespace and semicolon cleanup
Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Cc: Karel Zak <kzak@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:28 -07:00
Dan Carpenter 026dadad6b mwave: fix info leak in mwave_ioctl()
Smatch complains that on 64 bit systems, there is a hole in the
MW_ABILITIES struct between ->component_count and ->component_list[].
It leaks stack information from the mwave_ioctl() function.

I've added a memset() to initialize the struct to zero.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Greg KH <greg@kroah.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:28 -07:00
Manfred Spraul 758a6ba39e ipc/sem.c: rename try_atomic_semop() to perform_atomic_semop(), docu update
Cleanup: Some minor points that I noticed while writing the previous
patches

1) The name try_atomic_semop() is misleading: The function performs the
   operation (if it is possible).

2) Some documentation updates.

No real code change, a rename and documentation changes.

Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:28 -07:00
Manfred Spraul d12e1e50e4 ipc/sem.c: replace shared sem_otime with per-semaphore value
sem_otime contains the time of the last semaphore operation that
completed successfully.  Every operation updates this value, thus access
from multiple cpus can cause thrashing.

Therefore the patch replaces the variable with a per-semaphore variable.
The per-array sem_otime is only calculated when required.

No performance improvement on a single-socket i3 - only important for
larger systems.

Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:28 -07:00
Manfred Spraul f269f40ad5 ipc/sem.c: always use only one queue for alter operations
There are two places that can contain alter operations:
 - the global queue: sma->pending_alter
 - the per-semaphore queues: sma->sem_base[].pending_alter.

Since one of the queues must be processed first, this causes an odd
priorization of the wakeups: complex operations have priority over
simple ops.

The patch restores the behavior of linux <=3.0.9: The longest waiting
operation has the highest priority.

This is done by using only one queue:
 - if there are complex ops, then sma->pending_alter is used.
 - otherwise, the per-semaphore queues are used.

As a side effect, do_smart_update_queue() becomes much simpler: no more
goto logic.

Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:28 -07:00