Commit graph

97741 commits

Author SHA1 Message Date
Matthew Garrett
62d104d0de USB: Firmware loader driver for USB Apple iSight camera
Uninitialised Apple iSight drivers present with a distinctive USB ID.
Once firmware has been uploaded, they disconnect and reconnect with a
new ID. At this point they can be driven by the uvcvideo driver. As this
is unique to the Apple cameras and not functionality shared by any other
UVC devices, it makes sense to provide the firmware loading
functionality in a separate driver. This driver will read an isight.fw
file extracted from the Apple driver using the tools at
http://bersace03.free.fr/ift/ and upload it to the camera. It will also
handle the case where the device loses its firmware during hibernation
and must have it reloaded.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-29 13:59:02 -07:00
Ray Molenkamp
ebb3770c01 USB: FTDI_SIO : Add support for Matrix Orbital PID Range
This patch adds support for the range of PIDs
that have been allocated for FTDI based devices
at Matrix Orbital.

A small number of units have been shipped early 2008
with a faulty USB Descriptor.  Products that may have
this issue have been marked with the existing quirk to
work around the problem.

Signed-off-by: R. Molenkamp <rmolenkamp@matrixorbital.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-29 13:59:02 -07:00
Linus Torvalds
4bd27972e2 Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] fix double unlock of cpu_policy_rwsem in drivers/cpufreq/cpufreq.c
2008-05-29 10:04:54 -07:00
Linus Torvalds
a7f75d3bed Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: re-tune NUMA topologies
  sched: stop wake_affine from causing serious imbalance
  sched: fix sched_clock_cpu()
  revert ("sched: fair-group: SMP-nice for group scheduling")
  sched: cleanup
  show_schedstat(): fix memleak
  sched: unite unlikely pairs in rt_policy() and schedule_debug()
  revert ("sched: fair: weight calculations")
2008-05-29 09:26:17 -07:00
Lothar Waßmann
dca0261393 [CPUFREQ] fix double unlock of cpu_policy_rwsem in drivers/cpufreq/cpufreq.c
In drivers/cpufreq/cpufreq.c the function cpufreq_add_dev() takes the
error exit 'err_out_unregister' from different places once with the
'cpu_policy_rwsem' lock held, once with the lock released:
|		if (ret)
|			goto err_out_unregister;
|	}
|
|	policy->governor = NULL; /* to assure that the starting sequence is
|				  * run in cpufreq_set_policy */
|
|	/* set default policy */
|	ret = __cpufreq_set_policy(policy, &new_policy);
|	policy->user_policy.policy = policy->policy;
|	policy->user_policy.governor = policy->governor;
|
|	unlock_policy_rwsem_write(cpu);
|
|	if (ret) {
|		dprintk("setting policy failed\n");
|		goto err_out_unregister;
|	}

This leads to the following error message in case of a failing
__cpufreq_set_policy() call:
=====================================
[ BUG: bad unlock balance detected! ]
-------------------------------------
swapper/1 is trying to release lock (&per_cpu(cpu_policy_rwsem, cpu)) at:
[<c01b4564>] unlock_policy_rwsem_write+0x30/0x40
but there are no more locks to release!

other info that might help us debug this:
1 lock held by swapper/1:
 #0:  (sysdev_drivers_lock){--..}, at: [<c018fd18>] sysdev_driver_register+0x74/0x130

stack backtrace:
[<c002f588>] (dump_stack+0x0/0x14) from [<c00692fc>] (print_unlock_inbalance_bug+0xc8/0x104)
[<c0069234>] (print_unlock_inbalance_bug+0x0/0x104) from [<c006b7ac>] (lock_release_non_nested+0xc4/0x19c)
 r6:00000028 r5:c3c1ab80 r4:c01b4564
[<c006b6e8>] (lock_release_non_nested+0x0/0x19c) from [<c006b9e0>] (lock_release+0x15c/0x18c)
 r8:60000013 r7:00000001 r6:c01b4564 r5:c0541bb4 r4:c3c1ab80
[<c006b884>] (lock_release+0x0/0x18c) from [<c0061ba0>] (up_write+0x24/0x30)
 r8:c0541b80 r7:00000000 r6:ffffffea r5:c3c34828 r4:c0541b8c
[<c0061b7c>] (up_write+0x0/0x30) from [<c01b4564>] (unlock_policy_rwsem_write+0x30/0x40)
 r4:c3c34884
[<c01b4534>] (unlock_policy_rwsem_write+0x0/0x40) from [<c01b4c40>] (cpufreq_add_dev+0x324/0x398)
[<c01b491c>] (cpufreq_add_dev+0x0/0x398) from [<c018fd64>] (sysdev_driver_register+0xc0/0x130)
[<c018fca4>] (sysdev_driver_register+0x0/0x130) from [<c01b3574>] (cpufreq_register_driver+0xbc/0x174)

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Dave Jones <davej@redhat.com>
2008-05-29 12:10:12 -04:00
Ingo Molnar
6715930654 Merge commit 'linus/master' into sched-fixes-for-linus 2008-05-29 16:05:05 +02:00
Ingo Molnar
ea3f01f8af sched: re-tune NUMA topologies
improve the sysbench ramp-up phase and its peak throughput on
a 16way NUMA box, by turning on WAKE_AFFINE:

             tip/sched   tip/sched+wake-affine
-------------------------------------------------
    1:             700              830    +15.65%
    2:            1465             1391    -5.28%
    4:            3017             3105    +2.81%
    8:            5100             6021    +15.30%
   16:           10725            10745    +0.19%
   32:           10135            10150    +0.16%
   64:            9338             9240    -1.06%
  128:            8599             8252    -4.21%
  256:            8475             8144    -4.07%
-------------------------------------------------
  SUM:           57558            57882    +0.56%

this change also improves lat_ctx from 6.69 usecs to 1.11 usec:

  $ ./lat_ctx -s 0 2
  "size=0k ovr=1.19
  2 1.11

  $ ./lat_ctx -s 0 2
  "size=0k ovr=1.22
  2 6.69

in sysbench it's an overall win with some weakness at the lots-of-clients
side. That happens because we now under-balance this workload
a bit. To counter that effect, turn on NEWIDLE:

              wake-idle          wake-idle+newidle
 -------------------------------------------------
     1:             830              834    +0.43%
     2:            1391             1401    +0.65%
     4:            3105             3091    -0.43%
     8:            6021             6046    +0.42%
    16:           10745            10736    -0.08%
    32:           10150            10206    +0.55%
    64:            9240             9533    +3.08%
   128:            8252             8355    +1.24%
   256:            8144             8384    +2.87%
 -------------------------------------------------
   SUM:           57882            58591    +1.21%

as a bonus this not only improves the many-clients case but
also improves the (more important) rampup phase.

sysbench is a workload that quickly breaks down if the
scheduler over-balances, so since it showed an improvement
under NEWIDLE this change is definitely good.
2008-05-29 14:46:30 +02:00
Alexey Dobriyan
12293bf911 netfilter: nf_conntrack_expect: fix error path unwind in nf_conntrack_expect_init()
Signed-off-by: Alexey Dobriyan <adobriyan@parallels.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-05-29 03:19:37 -07:00
Mike Galbraith
b3137bc8e7 sched: stop wake_affine from causing serious imbalance
Prevent short-running wakers of short-running threads from overloading a single
cpu via wakeup affinity, and wire up disconnected debug option.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-29 11:29:20 +02:00
Peter Zijlstra
a381759d6a sched: fix sched_clock_cpu()
Make sched_clock_cpu() return 0 before it has been initialized and avoid
corrupting its state due to doing so.

This fixes the weird printk timestamp jump reported.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
2008-05-29 11:29:19 +02:00
Ingo Molnar
6363ca57c7 revert ("sched: fair-group: SMP-nice for group scheduling")
Yanmin Zhang reported:

Comparing with 2.6.25, volanoMark has big regression with kernel 2.6.26-rc1.
It's about 50% on my 8-core stoakley, 16-core tigerton, and Itanium Montecito.

With bisect, I located the following patch:

| 18d95a2832 is first bad commit
| commit 18d95a2832
| Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
| Date:   Sat Apr 19 19:45:00 2008 +0200
|
|     sched: fair-group: SMP-nice for group scheduling

Revert it so that we get v2.6.25 behavior.

Bisected-by: Yanmin Zhang <yanmin_zhang@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-29 11:28:57 +02:00
Ingo Molnar
4285f594f8 sched: cleanup
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-29 11:25:15 +02:00
Adrian Bunk
c6fba5451a show_schedstat(): fix memleak
The Coverity checker spotted a memleak introduced by commit
39106dcf85 (cpumask: use new cpus_scnprintf
function).

It seems the kfree() got lost between v2 and v3 of this patch...

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Mike Travis <travis@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-29 11:25:15 +02:00
Roel Kluin
3f33a7ce95 sched: unite unlikely pairs in rt_policy() and schedule_debug()
Removes obfuscation and may improve assembly.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-29 11:25:14 +02:00
Ingo Molnar
f9305d4a09 revert ("sched: fair: weight calculations")
Yanmin Zhang reported:

Comparing with kernel 2.6.25, sysbench+mysql(oltp, readonly) has many
regressions with 2.6.26-rc1:

 1) 8-core stoakley: 28%;
 2) 16-core tigerton: 20%;
 3) Itanium Montvale: 50%.

Bisect located this patch:

| 8f1bc385cf is first bad commit
| commit 8f1bc385cf
| Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
| Date:   Sat Apr 19 19:45:00 2008 +0200
|
|     sched: fair: weight calculations

Revert it to the 2.6.25 state.

Bisected-by: Yanmin Zhang <yanmin_zhang@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-29 11:24:01 +02:00
David S. Miller
8c3a01d0c2 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/linville/wireless-2.6 2008-05-29 01:49:04 -07:00
Arjan van de Ven
4c8411f8c1 bluetooth: fix locking bug in the rfcomm socket cleanup handling
in net/bluetooth/rfcomm/sock.c, rfcomm_sk_state_change() does the
following operation:

        if (parent && sock_flag(sk, SOCK_ZAPPED)) {
                /* We have to drop DLC lock here, otherwise
                 * rfcomm_sock_destruct() will dead lock. */
                rfcomm_dlc_unlock(d);
                rfcomm_sock_kill(sk);
                rfcomm_dlc_lock(d);
        }
}

which is fine, since rfcomm_sock_kill() will call sk_free() which will call
rfcomm_sock_destruct() which takes the rfcomm_dlc_lock()... so far so good.

HOWEVER, this assumes that the rfcomm_sk_state_change() function always gets
called with the rfcomm_dlc_lock() taken. This is the case for all but one
case, and in that case where we don't have the lock, we do a double unlock
followed by an attempt to take the lock, which due to underflow isn't
going anywhere fast.

This patch fixes this by moving the stragling case inside the lock, like
the other usages of the same call are doing in this code.

This was found with the help of the www.kerneloops.org project, where this
deadlock was observed 51 times at this point in time:
http://www.kerneloops.org/search.php?search=rfcomm_sock_destruct

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-05-29 01:32:47 -07:00
Senthil Balasubramanian
c97c23e386 mac80211: fix alignment issue with compare_ether_addr()
This addresses an alignment issue with compare_ether_addr().
The addresses passed to compare_ether_addr should be two bytes aligned.
It may function properly in x86 platform. However may not work properly
on IA-64 or ARM processor.

This also fixes a typo in mlme.c where the sk_buff struct name is incorect.
Though sizeof() works for any incorrect structure pointer name as its just
a pointer length that we want, lets just fix it.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:50 -04:00
Senthil Balasubramanian
70d251b24c mac80211: Fix for NULL pointer dereference in sta_info_get()
This addresses a NULL pointer dereference in sta_info_get().
TID and sta_info are extracted in ADDBA Timer expiry function
through the timer handler's argument.

The problem is extracging the TID (which was stored in
timer_to_tid[] array of type "u8") through "int *" typecast which
may also yield unwanted bytes for the MSB of TID that results
in incorrect sta_info and ieee80211_local pointers.

ieee80211_local pointer is NULL as illustrated below, it crashes in
sta_info_get(). The problem started when extracting ieee80211_local
pointer out of sta_info iteself and eventually crashed in
stat_info_get().

The proper way to fix is to change the data type of TID to u8
instead of u16. However changing all the occurences requires
some prototype changes as well. We should fix this in upcoming
patches.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: Luis Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:49 -04:00
Yi Zhu
f6d9710489 mac80211: fix a typo in ieee80211_handle_filtered_frame comment
fix a typo in ieee80211_handle_filtered_frame comment

Signed-off-by: Yi Zhu <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:49 -04:00
Jussi Kivilinna
a762483726 rndis_wlan: add missing range check for power_output modparam
Range check for power_output were missing.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:48 -04:00
Guy Cohen
135a5484c3 iwlwifi: fix rate scale TLC column selection bug
This patch fixes a case that a wrong maximal rate is selected when
searching for better configurations.

Signed-off-by: Guy Cohen <guy.cohen@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:48 -04:00
Guy Cohen
47cfd46396 iwlwifi: fix exit from stay_in_table state
When exiting from stay in table state (e.g. timer expiration),
all the statistics are reset and the RS flow should not continue
but only after enough statistics are collected again.

Signed-off-by: Guy Cohen <guy.cohen@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:47 -04:00
Scott Ashcroft
4364623cb7 rndis_wlan: Make connections to TKIP PSK networks work
This patch allows the rndis_wlan driver to connect to TKIP PSK
networks.  It uses the ASSOCIATION_INFORMATION RNDIS call to pull back
the IEs and sends them back to userspace using wireless events. Tested
on a few wireless networks I have access to. Based on the similar
code in ndiswrapper.

Signed-off-by: Scott Ashcroft <scott.ashcroft@talk21.com>
[edit: cleanups]
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:46 -04:00
Abhijeet Kolekar
d4231ca3e1 mac80211 : Fixes the status message for iwconfig
iwconfig was showing incorrect status messages when disassociated.
Patch fixes this by always checking for association status in
ioctl calls for getting ap address.

Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:46 -04:00
Ivo van Doorn
633257d3db rt2x00: Use atomic interface iteration in irq context
rt2x00lib_beacondone() is called from interrupt context,
this means we cannot use the mac80211 interface iterator
that uses the rtnl lock (since that uses a mutex which can sleep).
Instead we should use the atomic mac80211 interface iterator.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:45 -04:00
Ivo van Doorn
f06a0f486d rt2x00: Reset antenna RSSI after switch
When the antenna configuration has changed we should reset
the antenna RSSI value. Otherwise the value will be influenced
by the previous configuration quality which in turn will affect
the antenna diversity.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:45 -04:00
Ivo van Doorn
2088d4174e rt2x00: Don't count retries as failure
Link quality estimation became quite low for all rt2x00 drivers
because the number of retries it took to send the frame were
counted as failure.
This does not correspond to the legacy driver link quality calculation,
by not counting it we will send somewhat more optimistic values to
mac80211.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:44 -04:00
Ivo van Doorn
0f3e63a55b rt2x00: Fix memleak in tx() path
When the tx() handler runs while the device has disapeared,
we did return NETDEV_TX_OK but didn't free the skb.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:43 -04:00
Tomas Winkler
9381be059b mac80211: reorder channel and freq reporting in wext scan report
This patch switch order of channel and freq (SIOCGIWFREQ) reports
in scan results in order to overcome wpa_supplicant inability
to handle channel numbers in 5.2Ghz band.
Wext reporting channel number is ambiguous as channels 7-12 (802.11j)
exist on both bands.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:43 -04:00
Michael Buesch
3bf0a32e22 b43: Fix controller restart crash
This fixes a kernel crash on rmmod, in the case where the controller
was restarted before doing the rmmod.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:42 -04:00
Tomas Winkler
167ad6f7a2 mac80211: fix ieee80211_rx_bss_put/get imbalance
This patch fixes iee80211_rx_bss_put/get imbalance
introduced by 'mac80211: enable IBSS merging' patch.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:42 -04:00
Nicolas Kaiser
679fda1aa4 net/mac80211: always true conditionals
Correct always true conditionals.

Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:41 -04:00
Michael Buesch
6b4bec010d b43: Upload both beacon templates on initial load
This updates the beacon template code to upload both templates,
if we never uploaded one before.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:40 -04:00
Andrea Merello
bc1b1fb275 rtl8180: fix wrong parameter in grf5101_rf_set_channel
The grf5101 RF code needs to invoke grf5101_write_phy_antenna every time the
channel is being switch.

This should be done passing the channel number to that function.
Incorrectly we were passing the same value that is written on the
channel RF register.
This may cause problems when operating on ch 14.

This patch fixes it.

Thanks to Alessandro Di Marco who found this issue!

Signed-off-by: Andrea Merello <andreamrl@tiscali.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:40 -04:00
Andrea Merello
0a0ab41e83 rtl8180: fix wrong parameter in max2820_rf_set_channel
The max2820 RF code needs to invoke max2820_write_phy_antenna every time the
channel is being switch.

This should be done passing the channel number to that function.
Incorrectly we were passing the same value that is written on the
channel RF register.
This may cause problems when operating on ch 14.

This patch fixes it.

Thanks to Alessandro Di Marco who found this issue!

Signed-off-by: Andrea Merello <andreamrl@tiscali.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:39 -04:00
Andrea Merello
0823b2c3c1 rtl8180: fix wrong parameter in sa2400_rf_set_channel
The sa2400 RF code needs to invoke sa2400_write_phy_antenna every time the
channel is being switch.

This should be done passing the channel number to that function.
Incorrectly we were passing the same value that is written on the
channel RF register.
This may cause problems when operating on ch 14.

This patch fixes it.

Thanks to Alessandro Di Marco who found this issue!

Signed-off-by: Andrea Merello <andreamrl@tiscali.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:38 -04:00
John W. Linville
6f6c218f68 rtl8180: avoid NULL dereference in max2820_rf_set_channel
The static function max2820_rf_set_channel is called with conf == NULL
within its compilation unit.  Originally this defaulted to b/g channel
1, but "cfg80211 API for channels/bitrates, mac80211 and driver
conversion" (commit 8318d78a44) mistakenly
dropped this check.  This patch minimally restores the expected
behavior.

Reported-by: Colin Lai <colin_sh@163.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-28 16:43:38 -04:00
Linus Torvalds
3897b82c35 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] Workaround for RSE issue
2008-05-28 12:58:12 -07:00
Antonio Ospite
471637a575 Input: pxa27x_keypad - miscellaneous fixes
1. Set input bits for direct keys codes
2. Set input bits for rotary encoder codes only if rotary
   encoder is enabled
3. Enable EV_REL only if rotary encoder is enabled and rel_codes
   are set up

Signed-off-by: Antonio Ospite <ao2@openezx.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-05-28 14:35:52 -04:00
Jason Wessel
b33cb815b5 kgdbts: Use HW breakpoints with CONFIG_DEBUG_RODATA
Whenever CONFIG_DEBUG_RODATA is set in the kernel config many kernel
text sections become read-only, and the use of software breakpoints in
the kgdb tests will cause the kernel to fail to complete the start up.

Until such time that there is an official API for modifying read-only
text sections hardware breakpoints must be used to run the do_fork or
sys_open tests or the tests get skipped.

Also fix the duplicated include reported by:
Huang Weiyi <weiyi.huang@gmail.com>

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2008-05-28 12:49:57 -05:00
Harvey Harrison
827e609b45 kgdb: use common ascii helpers and put_unaligned_be32 helper
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2008-05-28 12:49:56 -05:00
David Howells
0a2ce2ffc3 Fix FRV minimum slab/kmalloc alignment
> +#define	ARCH_KMALLOC_MINALIGN		(sizeof(long) * 2)
> +#define	ARCH_SLAB_MINALIGN		(sizeof(long) * 2)

This doesn't work if SLAB is selected and slab debugging is enabled as
these are passed to the preprocessor, and the preprocessor doesn't
understand sizeof.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-28 09:05:28 -07:00
Linus Torvalds
b4412323cc Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  cfq-iosched: fix RCU problem in cfq_cic_lookup()
  block: make blktrace use per-cpu buffers for message notes
  Added in elevator switch message to blktrace stream
  Added in MESSAGE notes for blktraces
  block: reorder cfq_queue to save space on 64bit builds
  block: Move the second call to get_request to the end of the loop
  splice: handle try_to_release_page() failure
  splice: fix sendfile() issue with relay
2008-05-28 08:00:51 -07:00
David Howells
dc1d60a014 FRV: Specify the minimum slab/kmalloc alignment
Specify the minimum slab/kmalloc alignment to be 8 bytes.  This fixes a
crash when SLOB is selected as the memory allocator.  The FRV arch needs
this so that it can use the load- and store-double instructions without
faulting.  By default SLOB sets the minimum to be 4 bytes.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-28 07:59:06 -07:00
Vegard Nossum
5e55843bb8 MN10300: Fix typo in header guard
Fix a typo in the header guard of asm/ipc.h.

Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-28 07:59:06 -07:00
Jens Axboe
d6de8be711 cfq-iosched: fix RCU problem in cfq_cic_lookup()
cfq_cic_lookup() needs to properly protect ioc->ioc_data before
dereferencing it and also exclude updaters of ioc->ioc_data as well.

Also add a number of comments documenting why the existing RCU usage
is OK.

Thanks a lot to "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> for
review and comments!

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-05-28 14:49:28 +02:00
Jens Axboe
64565911cd block: make blktrace use per-cpu buffers for message notes
Currently it uses a single static char array, but that risks
being corrupted when multiple users issue message notes at the
same time. Make the buffers dynamically allocated when the trace
is setup and make them per-cpu instead.

The default max message size of 1k is also very large, the
interface is mainly for small text notes. So shrink it to 128 bytes.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-05-28 14:49:27 +02:00
Alan D. Brunelle
4722dc52a8 Added in elevator switch message to blktrace stream
Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-05-28 14:49:27 +02:00
Alan D. Brunelle
9d5f09a424 Added in MESSAGE notes for blktraces
Allows messages to be inserted into blktrace streams.

Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-05-28 14:49:27 +02:00