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  1. 13 Oct, 2006 3 commits
    • Paolo 'Blaisorblade' Giarrusso's avatar
      uml: use DEFCONFIG_LIST to avoid reading host's config · bc019aa5
      Paolo 'Blaisorblade' Giarrusso authored 
      This should make sure that, for UML, host's configuration files are not
considered, which avoids various pains to the user. Our dependency are such that
the obtained Kconfig will be valid and will lead to successful compilation -
however they cannot prevent an user from disabling any boot device, and if an
option is not set in the read .config (say /boot/config-XXX), with make
menuconfig ARCH=um, it is not set. This always disables UBD and all console I/O
channels, which leads to non-working UML kernels, so this bothers users -
especially now, since it will happen on almost every machine
(/boot/config-`uname -r` exists almost on every machine). It can be workarounded
with make defconfig ARCH=um, but it is non-obvious and can be avoided, so please
_do_ merge this patch.
Signed-off-by: default avatarPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: default avatarJeff Dike <jdike@addtoit.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      bc019aa5
    • Paolo 'Blaisorblade' Giarrusso's avatar
      uml: allow using again x86/x86_64 crypto code · 394455f8
      Paolo 'Blaisorblade' Giarrusso authored 
      Enable compilation of x86_64 crypto code;, and add the needed constant
to make the code compile again (that macro was added to i386 asm-offsets
between 2.6.17 and 2.6.18, in 6c2bb98b).
Signed-off-by: default avatarPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: default avatarJeff Dike <jdike@addtoit.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      394455f8
    • Patrick McHardy's avatar
      NET_SCHED: Fix fallout from dev->qdisc RCU change · 5f804c75
      Patrick McHardy authored 
      The move of qdisc destruction to a rcu callback broke locking in the
entire qdisc layer by invalidating previously valid assumptions about
the context in which changes to the qdisc tree occur.

The two assumptions were:

- since changes only happen in process context, read_lock doesn't need
  bottem half protection. Now invalid since destruction of inner qdiscs,
  classifiers, actions and estimators happens in the RCU callback unless
  they're manually deleted, resulting in dead-locks when read_lock in
  process context is interrupted by write_lock_bh in bottem half context.

- since changes only happen under the RTNL, no additional locking is
  necessary for data not used during packet processing (f.e. u32_list).
  Again, since destruction now happens in the RCU callback, this assumption
  is not valid anymore, causing races while using this data, which can
  result in corruption or use-after-free.

Instead of "fixing" this by disabling bottem halfs everywhere and adding
new locks/refcounting, this patch makes these assumptions valid again by
moving destruction back to process context. Since only the dev->qdisc
pointer is protected by RCU, but ->enqueue and the qdisc tree are still
protected by dev->qdisc_lock, destruction of the tree can be performed
immediately and only the final free needs to happen in the rcu callback
to make sure dev_queue_xmit doesn't access already freed memory.
Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      5f804c75
  3. 20 Sep, 2006 2 commits
  5. 19 Sep, 2006 14 commits
  7. 18 Sep, 2006 21 commits
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