1. 24 Sep, 2019 1 commit
  2. 30 May, 2019 1 commit
  3. 23 May, 2019 1 commit
  4. 12 Apr, 2019 1 commit
  5. 03 Feb, 2019 1 commit
  6. 21 Sep, 2018 1 commit
  7. 28 Jun, 2018 1 commit
    • Linus Torvalds's avatar
      Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL · a11e1d43
      Linus Torvalds authored
      
      
      The poll() changes were not well thought out, and completely
      unexplained.  They also caused a huge performance regression, because
      "->poll()" was no longer a trivial file operation that just called down
      to the underlying file operations, but instead did at least two indirect
      calls.
      
      Indirect calls are sadly slow now with the Spectre mitigation, but the
      performance problem could at least be largely mitigated by changing the
      "->get_poll_head()" operation to just have a per-file-descriptor pointer
      to the poll head instead.  That gets rid of one of the new indirections.
      
      But that doesn't fix the new complexity that is completely unwarranted
      for the regular case.  The (undocumented) reason for the poll() changes
      was some alleged AIO poll race fixing, but we don't make the common case
      slower and more complex for some uncommon special case, so this all
      really needs way more explanations and most likely a fundamental
      redesign.
      
      [ This revert is a revert of about 30 different commits, not reverted
        individually because that would just be unnecessarily messy  - Linus ]
      
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Christoph Hellwig <hch@lst.de>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      a11e1d43
  8. 26 May, 2018 2 commits
  9. 12 Feb, 2018 1 commit
    • Denys Vlasenko's avatar
      net: make getname() functions return length rather than use int* parameter · 9b2c45d4
      Denys Vlasenko authored
      
      
      Changes since v1:
      Added changes in these files:
          drivers/infiniband/hw/usnic/usnic_transport.c
          drivers/staging/lustre/lnet/lnet/lib-socket.c
          drivers/target/iscsi/iscsi_target_login.c
          drivers/vhost/net.c
          fs/dlm/lowcomms.c
          fs/ocfs2/cluster/tcp.c
          security/tomoyo/network.c
      
      Before:
      All these functions either return a negative error indicator,
      or store length of sockaddr into "int *socklen" parameter
      and return zero on success.
      
      "int *socklen" parameter is awkward. For example, if caller does not
      care, it still needs to provide on-stack storage for the value
      it does not need.
      
      None of the many FOO_getname() functions of various protocols
      ever used old value of *socklen. They always just overwrite it.
      
      This change drops this parameter, and makes all these functions, on success,
      return length of sockaddr. It's always >= 0 and can be differentiated
      from an error.
      
      Tests in callers are changed from "if (err)" to "if (err < 0)", where needed.
      
      rpc_sockname() lost "int buflen" parameter, since its only use was
      to be passed to kernel_getsockname() as &buflen and subsequently
      not used in any way.
      
      Userspace API is not changed.
      
          text    data     bss      dec     hex filename
      30108430 2633624  873672 33615726 200ef6e vmlinux.before.o
      30108109 2633612  873672 33615393 200ee21 vmlinux.o
      Signed-off-by: default avatarDenys Vlasenko <dvlasenk@redhat.com>
      CC: David S. Miller <davem@davemloft.net>
      CC: linux-kernel@vger.kernel.org
      CC: netdev@vger.kernel.org
      CC: linux-bluetooth@vger.kernel.org
      CC: linux-decnet-user@lists.sourceforge.net
      CC: linux-wireless@vger.kernel.org
      CC: linux-rdma@vger.kernel.org
      CC: linux-sctp@vger.kernel.org
      CC: linux-nfs@vger.kernel.org
      CC: linux-x25@vger.kernel.org
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9b2c45d4
  10. 01 Jul, 2017 1 commit
  11. 14 Apr, 2016 1 commit
  12. 11 May, 2015 1 commit
  13. 02 Mar, 2015 1 commit
  14. 24 Nov, 2014 1 commit
  15. 05 Nov, 2014 1 commit
    • David S. Miller's avatar
      net: Add and use skb_copy_datagram_msg() helper. · 51f3d02b
      David S. Miller authored
      
      
      This encapsulates all of the skb_copy_datagram_iovec() callers
      with call argument signature "skb, offset, msghdr->msg_iov, length".
      
      When we move to iov_iters in the networking, the iov_iter object will
      sit in the msghdr.
      
      Having a helper like this means there will be less places to touch
      during that transformation.
      
      Based upon descriptions and patch from Al Viro.
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      51f3d02b
  16. 19 Jan, 2014 1 commit
  17. 21 Nov, 2013 1 commit
    • Hannes Frederic Sowa's avatar
      net: rework recvmsg handler msg_name and msg_namelen logic · f3d33426
      Hannes Frederic Sowa authored
      
      
      This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
      set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
      to return msg_name to the user.
      
      This prevents numerous uninitialized memory leaks we had in the
      recvmsg handlers and makes it harder for new code to accidentally leak
      uninitialized memory.
      
      Optimize for the case recvfrom is called with NULL as address. We don't
      need to copy the address at all, so set it to NULL before invoking the
      recvmsg handler. We can do so, because all the recvmsg handlers must
      cope with the case a plain read() is called on them. read() also sets
      msg_name to NULL.
      
      Also document these changes in include/linux/net.h as suggested by David
      Miller.
      
      Changes since RFC:
      
      Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
      non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
      affect sendto as it would bail out earlier while trying to copy-in the
      address. It also more naturally reflects the logic by the callers of
      verify_iovec.
      
      With this change in place I could remove "
      if (!uaddr || msg_sys->msg_namelen == 0)
      	msg->msg_name = NULL
      ".
      
      This change does not alter the user visible error logic as we ignore
      msg_namelen as long as msg_name is NULL.
      
      Also remove two unnecessary curly brackets in ___sys_recvmsg and change
      comments to netdev style.
      
      Cc: David Miller <davem@davemloft.net>
      Suggested-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f3d33426
  18. 25 Apr, 2013 1 commit
  19. 28 Feb, 2013 1 commit
    • Sasha Levin's avatar
      hlist: drop the node parameter from iterators · b67bfe0d
      Sasha Levin authored
      
      
      I'm not sure why, but the hlist for each entry iterators were conceived
      
              list_for_each_entry(pos, head, member)
      
      The hlist ones were greedy and wanted an extra parameter:
      
              hlist_for_each_entry(tpos, pos, head, member)
      
      Why did they need an extra pos parameter? I'm not quite sure. Not only
      they don't really need it, it also prevents the iterator from looking
      exactly like the list iterator, which is unfortunate.
      
      Besides the semantic patch, there was some manual work required:
      
       - Fix up the actual hlist iterators in linux/list.h
       - Fix up the declaration of other iterators based on the hlist ones.
       - A very small amount of places were using the 'node' parameter, this
       was modified to use 'obj->member' instead.
       - Coccinelle didn't handle the hlist_for_each_entry_safe iterator
       properly, so those had to be fixed up manually.
      
      The semantic patch which is mostly the work of Peter Senna Tschudin is here:
      
      @@
      iterator name hlist_for_each_entry, hlist_for_each_entry_continue, hlist_for_each_entry_from, hlist_for_each_entry_rcu, hlist_for_each_entry_rcu_bh, hlist_for_each_entry_continue_rcu_bh, for_each_busy_worker, ax25_uid_for_each, ax25_for_each, inet_bind_bucket_for_each, sctp_for_each_hentry, sk_for_each, sk_for_each_rcu, sk_for_each_from, sk_for_each_safe, sk_for_each_bound, hlist_for_each_entry_safe, hlist_for_each_entry_continue_rcu, nr_neigh_for_each, nr_neigh_for_each_safe, nr_node_for_each, nr_node_for_each_safe, for_each_gfn_indirect_valid_sp, for_each_gfn_sp, for_each_host;
      
      type T;
      expression a,c,d,e;
      identifier b;
      statement S;
      @@
      
      -T b;
          <+... when != b
      (
      hlist_for_each_entry(a,
      - b,
      c, d) S
      |
      hlist_for_each_entry_continue(a,
      - b,
      c) S
      |
      hlist_for_each_entry_from(a,
      - b,
      c) S
      |
      hlist_for_each_entry_rcu(a,
      - b,
      c, d) S
      |
      hlist_for_each_entry_rcu_bh(a,
      - b,
      c, d) S
      |
      hlist_for_each_entry_continue_rcu_bh(a,
      - b,
      c) S
      |
      for_each_busy_worker(a, c,
      - b,
      d) S
      |
      ax25_uid_for_each(a,
      - b,
      c) S
      |
      ax25_for_each(a,
      - b,
      c) S
      |
      inet_bind_bucket_for_each(a,
      - b,
      c) S
      |
      sctp_for_each_hentry(a,
      - b,
      c) S
      |
      sk_for_each(a,
      - b,
      c) S
      |
      sk_for_each_rcu(a,
      - b,
      c) S
      |
      sk_for_each_from
      -(a, b)
      +(a)
      S
      + sk_for_each_from(a) S
      |
      sk_for_each_safe(a,
      - b,
      c, d) S
      |
      sk_for_each_bound(a,
      - b,
      c) S
      |
      hlist_for_each_entry_safe(a,
      - b,
      c, d, e) S
      |
      hlist_for_each_entry_continue_rcu(a,
      - b,
      c) S
      |
      nr_neigh_for_each(a,
      - b,
      c) S
      |
      nr_neigh_for_each_safe(a,
      - b,
      c, d) S
      |
      nr_node_for_each(a,
      - b,
      c) S
      |
      nr_node_for_each_safe(a,
      - b,
      c, d) S
      |
      - for_each_gfn_sp(a, c, d, b) S
      + for_each_gfn_sp(a, c, d) S
      |
      - for_each_gfn_indirect_valid_sp(a, c, d, b) S
      + for_each_gfn_indirect_valid_sp(a, c, d) S
      |
      for_each_host(a,
      - b,
      c) S
      |
      for_each_host_safe(a,
      - b,
      c, d) S
      |
      for_each_mesh_entry(a,
      - b,
      c, d) S
      )
          ...+>
      
      [akpm@linux-foundation.org: drop bogus change from net/ipv4/raw.c]
      [akpm@linux-foundation.org: drop bogus hunk from net/ipv6/raw.c]
      [akpm@linux-foundation.org: checkpatch fixes]
      [akpm@linux-foundation.org: fix warnings]
      [akpm@linux-foudnation.org: redo intrusive kvm changes]
      Tested-by: default avatarPeter Senna Tschudin <peter.senna@gmail.com>
      Acked-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
      Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
      Cc: Wu Fengguang <fengguang.wu@intel.com>
      Cc: Marcelo Tosatti <mtosatti@redhat.com>
      Cc: Gleb Natapov <gleb@redhat.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b67bfe0d
  20. 21 Feb, 2012 1 commit
    • Joe Perches's avatar
      isdn: whitespace coding style cleanup · 475be4d8
      Joe Perches authored
      
      
      isdn source code uses a not-current coding style.
      
      Update the coding style used on a per-line basis
      so that git diff -w shows only elided blank lines
      at EOF.
      
      Done with emacs and some scripts and some typing.
      
      Built x86 allyesconfig.
      No detected change in objdump -d or size.
      Signed-off-by: default avatarJoe Perches <joe@perches.com>
      475be4d8
  21. 31 Oct, 2011 1 commit
  22. 17 Apr, 2011 1 commit
  23. 30 Oct, 2010 1 commit
  24. 30 Mar, 2010 1 commit
    • Tejun Heo's avatar
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo authored
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
      
      percpu.h is included by sched.h and module.h and thus ends up being
      included when building most .c files.  percpu.h includes slab.h which
      in turn includes gfp.h making everything defined by the two files
      universally available and complicating inclusion dependencies.
      
      percpu.h -> slab.h dependency is about to be removed.  Prepare for
      this change by updating users of gfp and slab facilities include those
      headers directly instead of assuming availability.  As this conversion
      needs to touch large number of source files, the following script is
      used as the basis of conversion.
      
        http://userweb.kernel.org/~tj/misc/slabh-sweep.py
      
      
      
      The script does the followings.
      
      * Scan files for gfp and slab usages and update includes such that
        only the necessary includes are there.  ie. if only gfp is used,
        gfp.h, if slab is used, slab.h.
      
      * When the script inserts a new include, it looks at the include
        blocks and try to put the new include such that its order conforms
        to its surrounding.  It's put in the include block which contains
        core kernel includes, in the same order that the rest are ordered -
        alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
        doesn't seem to be any matching order.
      
      * If the script can't find a place to put a new include (mostly
        because the file doesn't have fitting include block), it prints out
        an error message indicating which .h file needs to be added to the
        file.
      
      The conversion was done in the following steps.
      
      1. The initial automatic conversion of all .c files updated slightly
         over 4000 files, deleting around 700 includes and adding ~480 gfp.h
         and ~3000 slab.h inclusions.  The script emitted errors for ~400
         files.
      
      2. Each error was manually checked.  Some didn't need the inclusion,
         some needed manual addition while adding it to implementation .h or
         embedding .c file was more appropriate for others.  This step added
         inclusions to around 150 files.
      
      3. The script was run again and the output was compared to the edits
         from #2 to make sure no file was left behind.
      
      4. Several build tests were done and a couple of problems were fixed.
         e.g. lib/decompress_*.c used malloc/free() wrappers around slab
         APIs requiring slab.h to be added manually.
      
      5. The script was run on all .h files but without automatically
         editing them as sprinkling gfp.h and slab.h inclusions around .h
         files could easily lead to inclusion dependency hell.  Most gfp.h
         inclusion directives were ignored as stuff from gfp.h was usually
         wildly available and often used in preprocessor macros.  Each
         slab.h inclusion directive was examined and added manually as
         necessary.
      
      6. percpu.h was updated not to include slab.h.
      
      7. Build test were done on the following configurations and failures
         were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
         distributed build env didn't work with gcov compiles) and a few
         more options had to be turned off depending on archs to make things
         build (like ipr on powerpc/64 which failed due to missing writeq).
      
         * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
         * powerpc and powerpc64 SMP allmodconfig
         * sparc and sparc64 SMP allmodconfig
         * ia64 SMP allmodconfig
         * s390 SMP allmodconfig
         * alpha SMP allmodconfig
         * um on x86_64 SMP allmodconfig
      
      8. percpu.h modifications were reverted so that it could be applied as
         a separate patch and serve as bisection point.
      
      Given the fact that I had only a couple of failures from tests on step
      6, I'm fairly confident about the coverage of this conversion patch.
      If there is a breakage, it's likely to be something in one of the arch
      headers which should be easily discoverable easily on most builds of
      the specific arch.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Guess-its-ok-by: default avatarChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  25. 06 Nov, 2009 1 commit
  26. 07 Oct, 2009 1 commit
  27. 30 Sep, 2009 1 commit
  28. 25 May, 2009 3 commits
  29. 09 Jan, 2009 4 commits
  30. 13 Dec, 2008 1 commit
    • Hannes Eder's avatar
      mISDN: consistently define 'debug' as '*u_int' · dfa96ec1
      Hannes Eder authored
      
      
      Impact: change data type for variable 'debug' from *int to *u_int,
      same for the argument type of mISDN_inittimer
      
      In "core.h" mISDN_inittimer is declared with the argument type "*u_int", make
      the definition in "timerdev.c" match this.
      
      This fixes also this warnings:
      
        drivers/isdn/mISDN/layer1.c:391:8: warning: incorrect type in assignment (different signedness)
        drivers/isdn/mISDN/layer1.c:391:8:    expected int *static [toplevel] debug
        drivers/isdn/mISDN/layer1.c:391:8:    got unsigned int [usertype] *deb
        drivers/isdn/mISDN/layer2.c:2200:8: warning: incorrect type in assignment (different signedness)
        drivers/isdn/mISDN/layer2.c:2200:8:    expected int *static [toplevel] debug
        drivers/isdn/mISDN/layer2.c:2200:8:    got unsigned int [usertype] *deb
        drivers/isdn/mISDN/socket.c:769:8: warning: incorrect type in assignment (different signedness)
        drivers/isdn/mISDN/socket.c:769:8:    expected int *static [toplevel] debug
        drivers/isdn/mISDN/socket.c:769:8:    got unsigned int [usertype] *deb
      Signed-off-by: default avatarHannes Eder <hannes@hanneseder.net>
      Acked-by: default avatarKarsten Keil <kkeil@suse.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      dfa96ec1
  31. 02 Aug, 2008 1 commit
  32. 26 Jul, 2008 1 commit