linux.git/arch/powerpc, branch v2.6.39

drivercore: revert addition of of_match to struct device

2011-05-18T18:32:23+00:00

Commit b826291c, "drivercore/dt: add a match table pointer to struct
device" added an of_match pointer to struct device to cache the
of_match_table entry discovered at driver match time.  This was unsafe
because matching is not an atomic operation with probing a driver.  If
two or more drivers are attempted to be matched to a driver at the
same time, then the cached matching entry pointer could get
overwritten.

This patch reverts the of_match cache pointer and reworks all users to
call of_match_device() directly instead.

Signed-off-by: Grant Likely

hw_breakpoints, powerpc: Fix CONFIG_HAVE_HW_BREAKPOINT off-case in ptrace_set_debugreg()

2011-05-06T09:24:46+00:00

We make use of ptrace_get_breakpoints() / ptrace_put_breakpoints() to
protect ptrace_set_debugreg() even if CONFIG_HAVE_HW_BREAKPOINT if off.
However in this case, these APIs are not implemented.

To fix this, push the protection down inside the relevant ifdef.
Best would be to export the code inside
CONFIG_HAVE_HW_BREAKPOINT into a standalone function to cleanup
the ifdefury there and call the breakpoint ref API inside. But
as it is more invasive, this should be rather made in an -rc1.

Fixes this build error:

  arch/powerpc/kernel/ptrace.c:1594: error: implicit declaration of function 'ptrace_get_breakpoints' make[2]: ***

Reported-by: Ingo Molnar 
Signed-off-by: Frederic Weisbecker 
Cc: LPPC 
Cc: Prasad 
Cc: v2.6.33.. 
Link: http://lkml.kernel.org/r/1304639598-4707-1-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar

Merge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/urgent

2011-05-04T18:33:42+00:00

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

2011-05-03T01:00:43+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (47 commits)
  sysctl: net: call unregister_net_sysctl_table where needed
  Revert: veth: remove unneeded ifname code from veth_newlink()
  smsc95xx: fix reset check
  tg3: Fix failure to enable WoL by default when possible
  networking: inappropriate ioctl operation should return ENOTTY
  amd8111e: trivial typo spelling: Negotitate -> Negotiate
  ipv4: don't spam dmesg with "Using LC-trie" messages
  af_unix: Only allow recv on connected seqpacket sockets.
  mii: add support of pause frames in mii_get_an
  net: ftmac100: fix scheduling while atomic during PHY link status change
  usbnet: Transfer of maintainership
  usbnet: add support for some Huawei modems with cdc-ether ports
  bnx2: cancel timer on device removal
  iwl4965: fix "Received BA when not expected"
  iwlagn: fix "Received BA when not expected"
  dsa/mv88e6131: fix unknown multicast/broadcast forwarding on mv88e6085
  usbnet: Resubmit interrupt URB if device is open
  iwl4965: fix "TX Power requested while scanning"
  iwlegacy: led stay solid on when no traffic
  b43: trivial: update module info about ucode16_mimo firmware
  ...

Revert wrong fixes for common misspellings

2011-04-27T06:31:11+00:00

These changes were incorrectly fixed by codespell. They were now
manually corrected.

Signed-off-by: Lucas De Marchi

powerpc, hw_breakpoints: Fix racy access to ptrace breakpoints

2011-04-25T15:33:54+00:00

While the tracer accesses ptrace breakpoints, the child task may
concurrently exit due to a SIGKILL and thus release its breakpoints
at the same time. We can then dereference some freed pointers.

To fix this, hold a reference on the child breakpoints before
manipulating them.

Reported-by: Oleg Nesterov 
Signed-off-by: Frederic Weisbecker 
Acked-by: Prasad 
Cc: Ingo Molnar 
Cc: Peter Zijlstra 
Cc: Will Deacon 
Cc: Paul Mundt 
Cc: v2.6.33.. 
Link: http://lkml.kernel.org/r/1302284067-7860-4-git-send-email-fweisbec@gmail.com

powerpc: Fix multicast problem in fs_enet driver

2011-04-21T23:59:30+00:00

mac-fec.c was setting individual UDP address registers instead of multicast
group address registers when joining a multicast group.
This prevented from correctly receiving UDP multicast packets.
According to datasheet, replaced hash_table_high and hash_table_low
with grp_hash_table_high and grp_hash_table_low respectively.
Also renamed hash_table_* with grp_hash_table_* in struct fec declaration
for 8xx: these registers are used only for multicast there.

Tested on a MPC5121 based board.
Build tested also against mpc866_ads_defconfig.

Signed-off-by: Andrea Galbusera 
Signed-off-by: David S. Miller

powerpc/powermac: Build fix with SMP and CPU hotplug

2011-04-18T05:46:35+00:00

Signed-off-by: Benjamin Herrenschmidt

powerpc/perf_event: Skip updating kernel counters if register value shrinks

2011-04-18T03:08:23+00:00

Because of speculative event roll back, it is possible for some event coutners
to decrease between reads on POWER7.  This causes a problem with the way that
counters are updated.  Delta calues are calculated in a 64 bit value and the
top 32 bits are masked.  If the register value has decreased, this leaves us
with a very large positive value added to the kernel counters.  This patch
protects against this by skipping the update if the delta would be negative.
This can lead to a lack of precision in the coutner values, but from my testing
the value is typcially fewer than 10 samples at a time.

Signed-off-by: Eric B Munson 
Cc: stable@kernel.org
Signed-off-by: Benjamin Herrenschmidt

powerpc: Don't write protect kernel text with CONFIG_DYNAMIC_FTRACE enabled

2011-04-18T03:08:21+00:00

This problem was noticed on an MPC855T platform. Ftrace did oops
when trying to write to the kernel text segment.

Many thanks to Joakim for finding the root cause of this problem.

Signed-off-by: Stefan Roese 
Cc: Joakim Tjernlund 
Cc: Benjamin Herrenschmidt 
Cc: Steven Rostedt 
Signed-off-by: Benjamin Herrenschmidt