Skip to content

L
linux
Switch branch/tag
  1. 05 Aug, 2016 13 commits
  3. 04 Aug, 2016 27 commits
    • Linus Torvalds's avatar
      Merge tag 'nfsd-4.8' of git://linux-nfs.org/~bfields/linux · a71e3604
      Linus Torvalds authored 
      Pull nfsd updates from Bruce Fields:
 "Highlights:

   - Trond made a change to the server's tcp logic that allows a fast
     client to better take advantage of high bandwidth networks, but may
     increase the risk that a single client could starve other clients;
     a new sunrpc.svc_rpc_per_connection_limit parameter should help
     mitigate this in the (hopefully unlikely) event this becomes a
     problem in practice.

   - Tom Haynes added a minimal flex-layout pnfs server, which is of no
     use in production for now--don't build it unless you're doing
     client testing or further server development"

* tag 'nfsd-4.8' of git://linux-nfs.org/~bfields/linux: (32 commits)
  nfsd: remove some dead code in nfsd_create_locked()
  nfsd: drop unnecessary MAY_EXEC check from create
  nfsd: clean up bad-type check in nfsd_create_locked
  nfsd: remove unnecessary positive-dentry check
  nfsd: reorganize nfsd_create
  nfsd: check d_can_lookup in fh_verify of directories
  nfsd: remove redundant zero-length check from create
  nfsd: Make creates return EEXIST instead of EACCES
  SUNRPC: Detect immediate closure of accepted sockets
  SUNRPC: accept() may return sockets that are still in SYN_RECV
  nfsd: allow nfsd to advertise multiple layout types
  nfsd: Close race between nfsd4_release_lockowner and nfsd4_lock
  nfsd/blocklayout: Make sure calculate signature/designator length aligned
  xfs: abstract block export operations from nfsd layouts
  SUNRPC: Remove unused callback xpo_adjust_wspace()
  SUNRPC: Change TCP socket space reservation
  SUNRPC: Add a server side per-connection limit
  SUNRPC: Micro optimisation for svc_data_ready
  SUNRPC: Call the default socket callbacks instead of open coding
  SUNRPC: lock the socket while detaching it
  ...
      a71e3604
    • Linus Torvalds's avatar
      Merge branch 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · d58b0d98
      Linus Torvalds authored 
      Pull more btrfs updates from Chris Mason:
 "This is part two of my btrfs pull, which is some cleanups and a batch
  of fixes.

  Most of the code here is from Jeff Mahoney, making the pointers we
  pass around internally more consistent and less confusing overall.  I
  noticed a small problem right before I sent this out yesterday, so I
  fixed it up and re-tested overnight"

* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (40 commits)
  Btrfs: fix __MAX_CSUM_ITEMS
  btrfs: btrfs_abort_transaction, drop root parameter
  btrfs: add btrfs_trans_handle->fs_info pointer
  btrfs: btrfs_relocate_chunk pass extent_root to btrfs_end_transaction
  btrfs: convert nodesize macros to static inlines
  btrfs: introduce BTRFS_MAX_ITEM_SIZE
  btrfs: cleanup, remove prototype for btrfs_find_root_ref
  btrfs: copy_to_sk drop unused root parameter
  btrfs: simpilify btrfs_subvol_inherit_props
  btrfs: tests, use BTRFS_FS_STATE_DUMMY_FS_INFO instead of dummy root
  btrfs: tests, require fs_info for root
  btrfs: tests, move initialization into tests/
  btrfs: btrfs_test_opt and friends should take a btrfs_fs_info
  btrfs: prefix fsid to all trace events
  btrfs: plumb fs_info into btrfs_work
  btrfs: remove obsolete part of comment in statfs
  btrfs: hide test-only member under ifdef
  btrfs: Ratelimit "no csum found" info message
  btrfs: Add ratelimit to btrfs printing
  Btrfs: fix unexpected balance crash due to BUG_ON
  ...
      d58b0d98
    • Linus Torvalds's avatar
      Merge tag 'upstream-4.8-rc1' of git://git.infradead.org/linux-ubifs · 3a303258
      Linus Torvalds authored 
      Pull UBI/UBIFS updates from Richard Weinberger:
 "This contains mostly cleanups and minor improvements of UBI and UBIFS"

* tag 'upstream-4.8-rc1' of git://git.infradead.org/linux-ubifs:
  ubi: Use bitmaps in Fastmap self-check code
  ubi: Be more paranoid while seaching for the most recent Fastmap
  ubi: Check whether the Fastmap anchor matches the super block
  ubi: Rework Fastmap attach base code
  ubi: Fix whitespace issue in count_fastmap_pebs()
  ubi: Introduce vol_ignored()
  ubi: Fix scan_fast() comment
  ubifs: switch_gc_head: Remove redondant sync of wbuf
  ubi: Make volume resize power cut aware
  ubi: Fix early logging
  ubi: gluebi: Fix double refcounting
  ubifs: Silence early error messages if MS_SILENT is set
  ubi: Fix race condition between ubi device creation and udev
  ubifs: Update comment for ubifs_errc
  ubi: Only read necessary size when reading the VID header
  ubifs: Make xattr structures static
  ubifs: Silence error output if MS_SILENT is set
      3a303258
    • Linus Torvalds's avatar
      Merge branch 'for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml · 9e0243db
      Linus Torvalds authored 
      Pull UML updates from Richard Weinberger:
 "Beside of various fixes this also contains patches to enable features
  such was Kcov, kmemleak and TRACE_IRQFLAGS_SUPPORT on UML"

* 'for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  hostfs: Freeing an ERR_PTR in hostfs_fill_sb_common()
  um: Support kcov
  um: Enable TRACE_IRQFLAGS_SUPPORT
  um: Use asm-generic/irqflags.h
  um: Fix possible deadlock in sig_handler_common()
  um: Select HAVE_DEBUG_KMEMLEAK
  um: Setup physical memory in setup_arch()
  um: Eliminate null test after alloc_bootmem
      9e0243db
    • Linus Torvalds's avatar
      Merge branch 'parisc-4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux · b067c904
      Linus Torvalds authored 
      Pull parisc updates from Helge Deller:

 - added an optimized hash implementation for parisc (George Spelvin)

 - C99 style cleanups in iomap.c (Amitoj Kaur Chawla)

 - added breaks to switch statement in PDC function (noticed by Dan
   Carpenter)

* 'parisc-4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Change structure intialisation to C99 style in iomap.c
  parisc: Add break statements to pdc_pat_io_pci_cfg_read()
  parisc: Add <asm/hash.h>
      b067c904
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu · 8e7106a6
      Linus Torvalds authored 
      Pull m68knommu updates from Greg Ungerer:
 "This series is all about Nicolas flat format support for MMU systems.

  Traditional m68k no-MMU flat format binaries can now be run on m68k
  MMU enabled systems too.  The series includes some nice cleanups of
  the binfmt_flat code and converts it to using proper user space
  accessor functions.

  With all this in place you can boot and run a complete no-MMU flat
  format based user space on an MMU enabled system"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68k: enable binfmt_flat on systems with an MMU
  binfmt_flat: allow compressed flat binary format to work on MMU systems
  binfmt_flat: add MMU-specific support
  binfmt_flat: update libraries' data segment pointer with userspace accessors
  binfmt_flat: use clear_user() rather than memset() to clear .bss
  binfmt_flat: use proper user space accessors with old relocs code
  binfmt_flat: use proper user space accessors with relocs processing code
  binfmt_flat: clean up create_flat_tables() and stack accesses
  binfmt_flat: use generic transfer_args_to_stack()
  elf_fdpic_transfer_args_to_stack(): make it generic
  binfmt_flat: prevent kernel dammage from corrupted executable headers
  binfmt_flat: convert printk invocations to their modern form
  binfmt_flat: assorted cleanups
  m68k: use same start_thread() on MMU and no-MMU
  m68k: fix file path comment
  m68k: fix bFLT executable running on MMU enabled systems
      8e7106a6
    • Dan Carpenter's avatar
      nfsd: remove some dead code in nfsd_create_locked() · 2b118859
      Dan Carpenter authored 
      We changed this around in f135af1041f ('nfsd: reorganize nfsd_create')
so "dchild" can't be an error pointer any more.  Also, dchild can't be
NULL here (and dput would already handle this even if it was).
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
      2b118859
    • J. Bruce Fields's avatar
      nfsd: drop unnecessary MAY_EXEC check from create · fa08139d
      J. Bruce Fields authored 
      We need an fh_verify to make sure we at least have a dentry, but actual
permission checks happen later.
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
      fa08139d
    • J. Bruce Fields's avatar
      nfsd: clean up bad-type check in nfsd_create_locked · 71423274
      J. Bruce Fields authored 
      Minor cleanup, no change in behavior.
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
      71423274
    • J. Bruce Fields's avatar
      nfsd: remove unnecessary positive-dentry check · d03d9fe4
      J. Bruce Fields authored 
      vfs_{create,mkdir,mknod} each begin with a call to may_create(), which
returns EEXIST if the object already exists.

This check is therefore unnecessary.

(In the NFSv2 case, nfsd_proc_create also has such a check.  Contrary to
RFC 1094, our code seems to believe that a CREATE of an existing file
should succeed.  I'm leaving that behavior alone.)
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
      d03d9fe4
    • J. Bruce Fields's avatar
      nfsd: reorganize nfsd_create · b44061d0
      J. Bruce Fields authored 
      There's some odd logic in nfsd_create() that allows it to be called with
the parent directory either locked or unlocked.  The only already-locked
caller is NFSv2's nfsd_proc_create().  It's less confusing to split out
the unlocked case into a separate function which the NFSv2 code can call
directly.

Also fix some comments while we're here.
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
      b44061d0
    • J. Bruce Fields's avatar
      nfsd: check d_can_lookup in fh_verify of directories · e75b23f9
      J. Bruce Fields authored 
      Create and other nfsd ops generally assume we can call lookup_one_len on
inodes with S_IFDIR set.  Al says that this assumption isn't true in
general, though it should be for the filesystem objects nfsd sees.

Add a check just to make sure our assumption isn't violated.

Remove a couple checks for i_op->lookup in create code.

Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
      e75b23f9
    • J. Bruce Fields's avatar
      nfsd: remove redundant zero-length check from create · 12391d07
      J. Bruce Fields authored 
      lookup_one_len already has this check.

The only effect of this patch is to return access instead of perm in the
0-length-filename case.  I actually prefer nfserr_perm (or _inval?), but
I doubt anyone cares.

The isdotent check seems redundant too, but I worry that some client
might actually care about that strange nfserr_exist error.
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
      12391d07
    • Oleg Drokin's avatar
      nfsd: Make creates return EEXIST instead of EACCES · 7eed34f1
      Oleg Drokin authored 
      When doing a create (mkdir/mknod) on a name, it's worth
checking the name exists first before returning EACCES in case
the directory is not writeable by the user.
This makes return values on the client more consistent
regardless of whenever the entry there is cached in the local
cache or not.
Another positive side effect is certain programs only expect
EEXIST in that case even despite POSIX allowing any valid
error to be returned.
Signed-off-by: default avatarOleg Drokin <green@linuxhacker.ru>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
      7eed34f1
    • James Hogan's avatar
      metag: Fix __cmpxchg_u32 asm constraint for CMP · 6154c187
      James Hogan authored 
      The LNKGET based atomic sequence in __cmpxchg_u32 has slightly incorrect
constraints for the return value which under certain circumstances can
allow an address unit register to be used as the first operand of a CMP
instruction. This isn't a valid instruction however as the encodings
only allow a data unit to be specified. This would result in an
assembler error like the following:

  Error: failed to assemble instruction: "CMP A0.2,D0Ar6"

Fix by changing the constraint from "=&da" (assigned, early clobbered,
data or address unit register) to "=&d" (data unit register only).

The constraint for the second operand, "bd" (an op2 register where op1
is a data unit register and the instruction supports O2R) is already
correct assuming the first operand is a data unit register.

Other cases of CMP in inline asm have had their constraints checked, and
appear to all be fine.

Fixes: 6006c0d8 ("metag: Atomics, locks and bitops")
Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Cc: linux-metag@vger.kernel.org
Cc: <stable@vger.kernel.org> # 3.9.x-
      6154c187
    • Doug Ledford's avatar
      Merge branches 'misc' and 'rxe' into k.o/for-4.8-1 · 7f1d25b4
      Doug Ledford authored
      7f1d25b4
    • Moni Shoua's avatar
      Soft RoCE driver · 8700e3e7
      Moni Shoua authored 
      Soft RoCE (RXE) - The software RoCE driver

ib_rxe implements the RDMA transport and registers to the RDMA core
device as a kernel verbs provider. It also implements the packet IO
layer. On the other hand ib_rxe registers to the Linux netdev stack
as a udp encapsulating protocol, in that case RDMA, for sending and
receiving packets over any Ethernet device.  This yields a RDMA
transport over the UDP/Ethernet network layer forming a RoCEv2
compatible device.

The configuration procedure of the Soft RoCE drivers requires
binding to any existing Ethernet network device. This is done with
/sys interface.

A userspace Soft RoCE library (librxe) provides user applications
the ability to run with Soft RoCE devices.  The use of rxe verbs ins
user space requires the inclusion of librxe as a device specifics
plug-in to libibverbs. librxe is packaged separately.

Architecture:

     +-----------------------------------------------------------+
     |                          Application                      |
     +-----------------------------------------------------------+
                            +-----------------------------------+
                            |             libibverbs            |
User                        +-----------------------------------+
                            +----------------+ +----------------+
                            | librxe         | | HW RoCE lib    |
                            +----------------+ +----------------+
+---------------------------------------------------------------+
     +--------------+                           +------------+
     | Sockets      |                           | RDMA ULP   |
     +--------------+                           +------------+
     +--------------+                  +---------------------+
     | TCP/IP       |                  | ib_core             |
     +--------------+                  +---------------------+
                             +------------+ +----------------+
Kernel                       | ib_rxe     | | HW RoCE driver |
                             +------------+ +----------------+
     +------------------------------------+
     | NIC driver                         |
     +------------------------------------+

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     +-----------------------------------------------------------+
     |                          Application                      |
     +-----------------------------------------------------------+
                            +-----------------------------------+
                            |             libibverbs            |
User                        +-----------------------------------+
                            +----------------+ +----------------+
                            | librxe         | | HW RoCE lib    |
                            +----------------+ +----------------+
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     +--------------+                           +------------+
     | Sockets      |                           | RDMA ULP   |
     +--------------+                           +------------+
     +--------------+                  +---------------------+
     | TCP/IP       |                  | ib_core             |
     +--------------+                  +---------------------+
                             +------------+ +----------------+
Kernel                       | ib_rxe     | | HW RoCE driver |
                             +------------+ +----------------+
     +------------------------------------+
     | NIC driver                         |
     +------------------------------------+
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Soft RoCE resources:

[1[ https://github.com/SoftRoCE/librxe-dev librxe - source code in
Github
[2] https://github.com/SoftRoCE/rxe-dev/wiki/rxe-dev:-Home - Soft RoCE
Wiki page
[3] https://github.com/SoftRoCE/librxe-dev - Soft RoCE userspace library
Signed-off-by: default avatarKamal Heib <kamalh@mellanox.com>
Signed-off-by: default avatarAmir Vadai <amirv@mellanox.com>
Signed-off-by: default avatarMoni Shoua <monis@mellanox.com>
Reviewed-by: default avatarHaggai Eran <haggaie@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      8700e3e7
    • Linus Torvalds's avatar
      Merge tag 'media/v4.8-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · c1ece767
      Linus Torvalds authored 
      Pull media DocBook removal and some fixups from Mauro Carvalho Chehab:

  - removal of the media DocBook (since it's all in Sphinx now)

  - videobuf2: Fix an allocation regression

  - a few fixes related to the CEC drivers

* tag 'media/v4.8-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  [media] cec: fix off-by-one memset
  [media] staging: add MEDIA_SUPPORT dependency
  [media] vivid: don't handle CEC_MSG_SET_STREAM_PATH
  [media] media: adv7180: Fix broken interrupt register access
  [media] vb2: Fix allocation size of dma_parms
  [media] vim2m: copy the other colorspace-related fields as well
  [media] adv7511: fix VIC autodetect
  doc-rst: Remove the media docbook
      c1ece767
    • Linus Torvalds's avatar
      Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux · fb1b83d3
      Linus Torvalds authored 
      Pull module updates from Rusty Russell:
 "The only interesting thing here is Jessica's patch to add
  ro_after_init support to modules.  The rest are all trivia"

* tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  extable.h: add stddef.h so "NULL" definition is not implicit
  modules: add ro_after_init support
  jump_label: disable preemption around __module_text_address().
  exceptions: fork exception table content from module.h into extable.h
  modules: Add kernel parameter to blacklist modules
  module: Do a WARN_ON_ONCE() for assert module mutex not held
  Documentation/module-signing.txt: Note need for version info if reusing a key
  module: Invalidate signatures on force-loaded modules
  module: Issue warnings when tainting kernel
  module: fix redundant test.
  module: fix noreturn attribute for __module_put_and_exit()
      fb1b83d3
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · d597690e
      Linus Torvalds authored 
      Merge even more updates from Andrew Morton:

 - dma-mapping API cleanup

 - a few cleanups and misc things

 - use jump labels in dynamic-debug

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  dynamic_debug: add jump label support
  jump_label: remove bug.h, atomic.h dependencies for HAVE_JUMP_LABEL
  arm: jump label may reference text in __exit
  tile: support static_key usage in non-module __exit sections
  sparc: support static_key usage in non-module __exit sections
  powerpc: add explicit #include <asm/asm-compat.h> for jump label
  drivers/media/dvb-frontends/cxd2841er.c: avoid misleading gcc warning
  MAINTAINERS: update email and list of Samsung HW driver maintainers
  block: remove BLK_DEV_DAX config option
  samples/kretprobe: fix the wrong type
  samples/kretprobe: convert the printk to pr_info/pr_err
  samples/jprobe: convert the printk to pr_info/pr_err
  samples/kprobe: convert the printk to pr_info/pr_err
  dma-mapping: use unsigned long for dma_attrs
  media: mtk-vcodec: remove unused dma_attrs
  include/linux/bitmap.h: cleanup
  tree-wide: replace config_enabled() with IS_ENABLED()
  drivers/fpga/Kconfig: fix build failure
      d597690e
    • Jason Baron's avatar
      dynamic_debug: add jump label support · 9049fc74
      Jason Baron authored 
      Although dynamic debug is often only used for debug builds, sometimes
its enabled for production builds as well.  Minimize its impact by using
jump labels.  This reduces the text section by 7000+ bytes in the kernel
image below.  It does increase data, but this should only be referenced
when changing the direction of the branches, and hence usually not in
cache.

     text     data     bss       dec     hex  filename
  8194852  4879776  925696  14000324  d5a0c4  vmlinux.pre
  8187337  4960224  925696  14073257  d6bda9  vmlinux.post

Link: http://lkml.kernel.org/r/d165b465e8c89bc582d973758d40be44c33f018b.1467837322.git.jbaron@akamai.comSigned-off-by: default avatarJason Baron <jbaron@akamai.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Joe Perches <joe@perches.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9049fc74
    • Jason Baron's avatar
      jump_label: remove bug.h, atomic.h dependencies for HAVE_JUMP_LABEL · 1f69bf9c
      Jason Baron authored 
      The current jump_label.h includes bug.h for things such as WARN_ON().
This makes the header problematic for inclusion by kernel.h or any
headers that kernel.h includes, since bug.h includes kernel.h (circular
dependency).  The inclusion of atomic.h is similarly problematic.  Thus,
this should make jump_label.h 'includable' from most places.

Link: http://lkml.kernel.org/r/7060ce35ddd0d20b33bf170685e6b0fab816bdf2.1467837322.git.jbaron@akamai.comSigned-off-by: default avatarJason Baron <jbaron@akamai.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Joe Perches <joe@perches.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1f69bf9c
    • Jason Baron's avatar
      arm: jump label may reference text in __exit · ddb45306
      Jason Baron authored 
      The jump table can reference text found in an __exit section.  Thus,
instead of discarding it at build time, include EXIT_TEXT as part of
__init and it will be released when the system boots.

Link: http://lkml.kernel.org/r/60284113bb759121e8ae3e99af1535647e52123f.1467837322.git.jbaron@akamai.comSigned-off-by: default avatarJason Baron <jbaron@akamai.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Joe Perches <joe@perches.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      ddb45306
    • Chris Metcalf's avatar
      tile: support static_key usage in non-module __exit sections · c14b4bcf
      Chris Metcalf authored 
      Previously, all the __exit sections were just dropped by the link phase.
However, if there are static_key (jump label) constructs in __exit
sections that are not modules, the link fails with the message:

   `.exit.text' referenced in section `__jump_table' of xxx.o:
   defined in discarded section `.exit.text' of xxx.o

Support this usage by keeping the .exit.text sections in the final image
if JUMP_LABEL is defined, then discarding them once initialization is
complete.

Link: http://lkml.kernel.org/r/bfd7c107c610c30e992868ebfe2a5d796a097464.1467837322.git.jbaron@akamai.comSigned-off-by: default avatarJason Baron <jbaron@akamai.com>
Signed-off-by: default avatarChris Metcalf <cmetcalf@mellanox.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Joe Perches <joe@perches.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c14b4bcf
    • Jason Baron's avatar
      sparc: support static_key usage in non-module __exit sections · 10d7227b
      Jason Baron authored 
      The jump table can reference text found in an __exit section.  Thus,
instead of discarding it at build/link time, include EXIT_TEXT as part
of __init and release it at system boot time.

Without this patch the link fails with:

    `.exit.text' referenced in section `__jump_table' of xxx.o:
    defined in discarded section `.exit.text' of xxx.o

Link: http://lkml.kernel.org/r/d822da427ab07a02a394602eca687104ff682f83.1467837322.git.jbaron@akamai.comSigned-off-by: default avatarJason Baron <jbaron@akamai.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Joe Perches <joe@perches.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      10d7227b
    • Jason Baron's avatar
      powerpc: add explicit #include <asm/asm-compat.h> for jump label · 5411fd7f
      Jason Baron authored 
      The stringify_in_c() macro may not be included. Make the dependency
explicit.

Link: http://lkml.kernel.org/r/564720c5328edd53c9d56db325be7215440eec3e.1467837322.git.jbaron@akamai.comSigned-off-by: default avatarJason Baron <jbaron@akamai.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Joe Perches <joe@perches.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Joe Perches <joe@perches.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      5411fd7f
    • Arnd Bergmann's avatar
      drivers/media/dvb-frontends/cxd2841er.c: avoid misleading gcc warning · bb9bd878
      Arnd Bergmann authored 
      The addition of jump label support in dynamic_debug caused an unexpected
warning in exactly one file in the kernel:

  drivers/media/dvb-frontends/cxd2841er.c: In function 'cxd2841er_tune_tc':
  include/linux/dynamic_debug.h:134:3: error: 'carrier_offset' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     __dynamic_dev_dbg(&descriptor, dev, fmt, \
     ^~~~~~~~~~~~~~~~~
  drivers/media/dvb-frontends/cxd2841er.c:3177:11: note: 'carrier_offset' was declared here
    int ret, carrier_offset;
             ^~~~~~~~~~~~~~

The problem seems to be that the compiler gets confused by the extra
conditionals in static_branch_unlikely, to the point where it can no
longer keep track of which branches have already been taken, and it
doesn't realize that this variable is now always initialized when it
gets used.

I have done lots of randconfig kernel builds and could not find any
other file with this behavior, so I assume it's a rare enough glitch
that we don't need to change the jump label support but instead just
work around the warning in the driver.

To achieve that, I'm moving the check for the return value into the
switch() statement, which is an obvious transformation, but is enough to
un-confuse the compiler here.  The resulting code is not as nice to
read, but at least we retain the behavior of warning if it gets changed
to actually access an uninitialized carrier offset value in the future.

Link: http://lkml.kernel.org/r/20160713204342.1221511-1-arnd@arndb.deSigned-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarAbylay Ospan <aospan@netup.ru>
Cc: Sergey Kozlov <serjk@netup.ru>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Jason Baron <jbaron@akamai.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      bb9bd878
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7