linux/Documentation, branch v3.4.55

doc, kernel-parameters: Document 'console=hvc'

2013-03-03T22:06:38Z

commit a2fd6419174470f5ae6383f5037d0ee21ed9833f upstream. Both the PowerPC hypervisor and Xen hypervisor can utilize the hvc driver. Signed-off-by: Konrad Rzeszutek Wilk Link: http://lkml.kernel.org/r/1361825650-14031-3-git-send-email-konrad.wilk@oracle.com Signed-off-by: H. Peter Anvin Signed-off-by: Greg Kroah-Hartman

doc, xen: Mention 'earlyprintk=xen' in the documentation.

2013-03-03T22:06:38Z

commit 2482a92e7d17187301d7313cfe5021b13393a0b4 upstream. The earlyprintk for Xen PV guests utilizes a simple hypercall (console_io) to provide output to Xen emergency console. Note that the Xen hypervisor should be booted with 'loglevel=all' to output said information. Reported-by: H. Peter Anvin Signed-off-by: Konrad Rzeszutek Wilk Link: http://lkml.kernel.org/r/1361825650-14031-2-git-send-email-konrad.wilk@oracle.com Signed-off-by: H. Peter Anvin Signed-off-by: Greg Kroah-Hartman

rbd: kill create_snap sysfs entry

2013-01-17T16:51:20Z

Josh proposed the following change, and I don't think I could explain it any better than he did: From: Josh Durgin Date: Tue, 24 Jul 2012 14:22:11 -0700 To: ceph-devel Message-ID: <500F1203.9050605@inktank.com> From: Josh Durgin Right now the kernel still has one piece of rbd management duplicated from the rbd command line tool: snapshot creation. There's nothing special about snapshot creation that makes it advantageous to do from the kernel, so I'd like to remove the create_snap sysfs interface. That is, /sys/bus/rbd/devices//create_snap would be removed. Does anyone rely on the sysfs interface for creating rbd snapshots? If so, how hard would it be to replace with: rbd snap create pool/image@snap Is there any benefit to the sysfs interface that I'm missing? Josh This patch implements this proposal, removing the code that implements the "snap_create" sysfs interface for rbd images. As a result, quite a lot of other supporting code goes away. [elder@inktank.com: commented out rbd_req_sync_exec() to avoid warning] Suggested-by: Josh Durgin Signed-off-by: Alex Elder Reviewed-by: Josh Durgin (based on commit 02cdb02ceab1f3dd9ac2bc899fc51f0e0e744782)

tcp: implement RFC 5961 3.2

2013-01-11T17:07:14Z

[ Upstream commit 282f23c6ee343126156dd41218b22ece96d747e3 ] Implement the RFC 5691 mitigation against Blind Reset attack using RST bit. Idea is to validate incoming RST sequence, to match RCV.NXT value, instead of previouly accepted window : (RCV.NXT <= SEG.SEQ < RCV.NXT+RCV.WND) If sequence is in window but not an exact match, send a "challenge ACK", so that the other part can resend an RST with the appropriate sequence. Add a new sysctl, tcp_challenge_ack_limit, to limit number of challenge ACK sent per second. Add a new SNMP counter to count number of challenge acks sent. (netstat -s | grep TCPChallengeACK) Signed-off-by: Eric Dumazet Cc: Kiran Kumar Kella Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

get_dvb_firmware: fix download site for tda10046 firmware

2012-12-03T19:47:11Z

commit 25ec43d3e6306978cf66060ed18c4160ce8fc302 upstream. The previous website doesn't exist anymore. Update it to one site that actually exists. Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Peter Huewe Signed-off-by: Greg Kroah-Hartman

memcg: oom: fix totalpages calculation for memory.swappiness==0

2012-11-26T19:37:45Z

commit 9a5a8f19b43430752067ecaee62fc59e11e88fa6 upstream. oom_badness() takes a totalpages argument which says how many pages are available and it uses it as a base for the score calculation. The value is calculated by mem_cgroup_get_limit which considers both limit and total_swap_pages (resp. memsw portion of it). This is usually correct but since fe35004fbf9e ("mm: avoid swapping out with swappiness==0") we do not swap when swappiness is 0 which means that we cannot really use up all the totalpages pages. This in turn confuses oom score calculation if the memcg limit is much smaller than the available swap because the used memory (capped by the limit) is negligible comparing to totalpages so the resulting score is too small if adj!=0 (typically task with CAP_SYS_ADMIN or non zero oom_score_adj). A wrong process might be selected as result. The problem can be worked around by checking mem_cgroup_swappiness==0 and not considering swap at all in such a case. Signed-off-by: Michal Hocko Acked-by: David Rientjes Acked-by: Johannes Weiner Acked-by: KOSAKI Motohiro Acked-by: KAMEZAWA Hiroyuki Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman

ARM: at91/tc: fix typo in the DT document

2012-10-31T17:03:01Z

commit 11930c530f3edf81160e4962e363d579f5cdce7e upstream. Signed-off-by: Josh Wu Signed-off-by: Nicolas Ferre Acked-by: Jean-Christophe PLAGNIOL-VILLARD Signed-off-by: Greg Kroah-Hartman

ALSA: hda - Workaround for silent output on VAIO Z with ALC889

2012-10-02T17:29:53Z

commit e427c2375646789ecd0ccaef1a1e41458559ab2d upstream. On recent kernels, Realtek codec parser tries to optimize the routing aggressively and take the headphone output as primary at first. This caused a regression on VAIO Z with ALC889, the silent output from the speaker. The problem seems that the speaker pin must be connected to the first DAC (0x02) on this machine by some reason although the codec itself advertises the flexible routing with any DACs. This patch adds a fix-up for choosing the speaker pin as the primary so that the right DAC is assigned on this device. Reported-and-tested-by: Adam Williamson Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman

i2c-i801: Add Device IDs for Intel Lynx Point-LP PCH

2012-09-14T17:00:33Z

commit 4a8f1ddde942e232387e6129ce4f4c412e43802f upstream. Add the SMBus Device IDs for the Intel Lynx Point-LP PCH. Signed-off-by: James Ralston Signed-off-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman

stable: update references to older 2.6 versions for 3.x

2012-08-09T15:31:37Z

commit 2584f5212d97b664be250ad5700a2d0fee31a10d upstream. Also add information on where the respective trees are. Signed-off-by: Paul Gortmaker Acked-by: Rob Landley Signed-off-by: Greg Kroah-Hartman