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  1. 24 Aug, 2007 27 commits
  3. 23 Aug, 2007 13 commits
    • H. Peter Anvin's avatar
      [x86 setup] Make sure AH=00h when setting a video mode · 71351b98
      H. Peter Anvin authored 
      Passing a u8 into a register doesn't mean gcc will zero-extend it.
Also, don't depend on thhe register not to change.

Per bug report from Saul Tamari.
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
      71351b98
    • H. Peter Anvin's avatar
      [x86 setup] Volatilize asm() statements · b015124e
      H. Peter Anvin authored 
      asm() statements need to be volatile when:

a. They have side effects (other than value returned).
b. When the value returned can vary over time.
c. When they have ordering constraints that cannot be expressed to gcc.

In particular, the keyboard and timer reads were violating constraint (b),
which resulted in the keyboard/timeout poll getting
loop-invariant-removed when compiling with gcc 4.2.0.

Thanks to an anonymous bug reporter for pointing this out.
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
      b015124e
    • Mauro Carvalho Chehab's avatar
      V4L/DVB (6070): Fix a warning at dvb_net · 04b35abe
      Mauro Carvalho Chehab authored 
      static function dvb_net_sec declares input arg "pkt" as u8. However, the
same argument at dvb_net_sec_callback is defined as "const u8". When
calling dvb_net_sec, this is casted as just "u8".

gcc 4.2.1 generates a warning about that:

  CC [M]  drivers/media/dvb/dvb-core/dvb_net.o
drivers/media/dvb/dvb-core/dvb_net.c: In function "dvb_net_sec_callback":
drivers/media/dvb/dvb-core/dvb_net.c:905: warning: passing argument 2 of
		"dvb_net_sec" discards qualifiers from pointer target type
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
      04b35abe
    • Trent Piepho's avatar
      V4L/DVB (6042): b2c2-flexcop: fix Airstar HD5000 tuning regression · 6175e487
      Trent Piepho authored 
      Git changeset 6bdcc6e6 dropped the
stand-alone lgh06xf module, whose functionality was absorbed into the
dvb-pll module. However, there was a minor difference between the code
in lgh06xf and dvb-pll, which caused a regression in b2c2-flexcop
devices using the LG-H06xF NIM.

dvb-pll will probe for the presence of an i2c pll chip by performing a
single byte read, the lgh06xf driver did not do this. Unfortunately, the
code in flexcop-i2c.c does not currently support 1 byte or 0 byte reads
as a probe.  Such probes with the current code will always fail.

In order to work around this problem, and restore proper functionality
of the Airstar HD5000 device, this hack was created to make the probe
appear to succeed.  The single byte read in dvb_pll_attach is the only
place where such a probe would ever occur, so this change is safe, and
will not affect any other devices.

Of course, if one knew how to actually perform the read operation, it
would be better to go that route.  In the meantime, however, we must
apply this workaround, in order to prevent the regression that causes
tuning to fail on the Airstar HD5000 ATSC device.

Thanks to Jarod Wilson, who had originally reported this regression, and
to Geoffrey Hausheer, whose original workaround patch led us to find the
actual cause of the problem.
Signed-off-by: default avatarTrent Piepho <xyzzy@speakeasy.org>
Cc: Geoffrey Hausheer <inli3epy93n@phracturedblue.com>
Acked-by: default avatarJarod Wilson <jwilson@redhat.com>
Signed-off-by: default avatarMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
      6175e487
    • Mariusz Kozlowski's avatar
      9p: fix bad error path in conversion routines · 02881d94
      Mariusz Kozlowski authored 
      When buf_check_overflow() returns != 0 we will hit kfree(ERR_PTR(err))
and it will not be happy about it.
Signed-off-by: default avatarMariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      02881d94
    • Eric Van Hensbergen's avatar
      9p: remove deprecated v9fs_fid_lookup_remove() · fbcb7599
      Eric Van Hensbergen authored 
      This patch removes the v9fs_fid_lookup_remove which is no longer used.

Based on original patch from Adrian Bunk <bunk@stusta.de> which
used #if 0 to isolate the code.
Signed-off-by: default avatarAdrian Bunk <bunk@stusta.de>
Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      fbcb7599
    • Eric Van Hensbergen's avatar
      9p: update maintainers and documentation · 27a2a5ff
      Eric Van Hensbergen authored 
      Updates to the MAINTAINERS file and documentation for 9p to point to the
swik wiki versus the outdated sf.net page.  Also updated some email addresses
and added pointers to papers which better describe the implementation and
application of the Linux 9p client.
Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      27a2a5ff
    • Eric Van Hensbergen's avatar
      9p: fix use after free · 1a3cac6c
      Eric Van Hensbergen authored 
      On 7/22/07, Adrian Bunk <bunk@stusta.de> wrote:
     The Coverity checker spotted the following use-after-free
     in net/9p/mux.c:

     <--  snip  -->

     ...
     struct p9_conn *p9_conn_create(struct p9_transport *trans, int msize,
                                         unsigned char *extended)
     {
     ...
             if (!m->tagpool) {
                     kfree(m);
                     return ERR_PTR(PTR_ERR(m->tagpool));
             }
     ...

     <--  snip  -->

Also spotted was a leak of the same structure further down in the function.
Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
      1a3cac6c
    • Ingo Molnar's avatar
      sched: tweak the sched_runtime_limit tunable · 505c0efd
      Ingo Molnar authored 
      Michael Gerdau reported reniced task CPU usage weirdnesses.
Such symptoms can be caused by limit underruns so double the
sched_runtime_limit.
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      505c0efd
    • Suresh Siddha's avatar
      sched: skip updating rq's next_balance under null SD · f549da84
      Suresh Siddha authored 
      Was playing with sched_smt_power_savings/sched_mc_power_savings and
found out that while the scheduler domains are reconstructed when sysfs
settings change, rebalance_domains() can get triggered with null domain
on other cpus, which is setting next_balance to jiffies + 60*HZ.
Resulting in no idle/busy balancing for 60 seconds.

Fix this.
Signed-off-by: default avatarSuresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      f549da84
    • Suresh Siddha's avatar
      sched: fix broken SMT/MC optimizations · f8700df7
      Suresh Siddha authored 
      On a four package system with HT - HT load balancing optimizations were
broken.  For example, if two tasks end up running on two logical threads
of one of the packages, scheduler is not able to pull one of the tasks
to a completely idle package.

In this scenario, for nice-0 tasks, imbalance calculated by scheduler
will be 512 and find_busiest_queue() will return 0 (as each cpu's load
is 1024 > imbalance and has only one task running).

Similarly MC scheduler optimizations also get fixed with this patch.

[ mingo@elte.hu: restored fair balancing by increasing the fuzz and
                 adding it back to the power decision, without the /2
                 factor. ]
Signed-off-by: default avatarSuresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      f8700df7
    • Christian Borntraeger's avatar
      sched: accounting regression since rc1 · efe567fc
      Christian Borntraeger authored 
      Fix the accounting regression for CONFIG_VIRT_CPU_ACCOUNTING.  It
reverts parts of commit b27f03d4 by
converting fs/proc/array.c back to cputime_t.  The new functions
task_utime and task_stime now return cputime_t instead of clock_t.  If
CONFIG_VIRT_CPU_ACCOUTING is set, task->utime and task->stime are
returned directly instead of using sum_exec_runtime.

Patch is tested on s390x with and without VIRT_CPU_ACCOUTING as well as
on i386.

[ mingo@elte.hu: cleanups, comments. ]
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      efe567fc
    • Eric W. Biederman's avatar
      sched: fix sysctl directory permissions · c57baf1e
      Eric W. Biederman authored 
      There are two remaining gotchas:

- The directories have impossible permissions (writeable).

- The ctl_name for the kernel directory is inconsistent with
  everything else.  It should be CTL_KERN.
Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      c57baf1e