linux-toradex.git/include/linux, branch v2.6.33.2

quota: manage reserved space when quota is not active [v2]

2010-04-01T23:02:12+00:00

commit c469070aea5a0ada45a836937c776fd3083dae2b upstream.

Since we implemented generic reserved space management interface,
then it is possible to account reserved space even when quota
is not active (similar to i_blocks/i_bytes).

Without this patch following testcase result in massive comlain from
WARN_ON in dquot_claim_space()

TEST_CASE:
mount /dev/sdb /mnt -oquota
dd if=/dev/zero of=/mnt/test bs=1M count=1
quotaon /mnt
# fs_reserved_spave == 1Mb
# quota_reserved_space == 0, because quota was disabled
dd if=/dev/zero of=/mnt/test seek=1 bs=1M count=1
# fs_reserved_spave == 2Mb
# quota_reserved_space == 1Mb
sync  # ->dquot_claim_space() -> WARN_ON

Signed-off-by: Dmitry Monakhov 
Signed-off-by: Jan Kara 
Signed-off-by: Greg Kroah-Hartman

skbuff: remove unused dma_head & dma_maps fields

2010-04-01T23:02:10+00:00

[ Upstream commit 03e6d819c2cb2cc8ce5642669a0a7c72336ee7a2 ]

The dma map fields in the skb_shared_info structure no longer has any users
and can be dropped since it is making the skb_shared_info unecessarily larger.

Running slabtop show that we were using 4K slabs for the skb->head on x86_64 w/
an allocation size of 1522.  It turns out that the dma_head and dma_maps array
made skb_shared large enough that we had crossed over the 2k boundary with
standard frames and as such we were using 4k blocks of memory for all skbs.

Signed-off-by: Alexander Duyck 
Signed-off-by: Jeff Kirsher 
Acked-by: Eric Dumazet 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

net: Potential null skb->dev dereference

2010-04-01T23:02:10+00:00

[ Upstream commit 0641e4fbf2f824faee00ea74c459a088d94905fd ]

When doing "ifenslave -d bond0 eth0", there is chance to get NULL
dereference in netif_receive_skb(), because dev->master suddenly becomes
NULL after we tested it.

We should use ACCESS_ONCE() to avoid this (or rcu_dereference())

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

netfilter: ctnetlink: fix reliable event delivery if message building fails

2010-04-01T23:02:09+00:00

[ Upstream commit 37b7ef7203240b3aba577bb1ff6765fe15225976 ]

This patch fixes a bug that allows to lose events when reliable
event delivery mode is used, ie. if NETLINK_BROADCAST_SEND_ERROR
and NETLINK_RECV_NO_ENOBUFS socket options are set.

Signed-off-by: Pablo Neira Ayuso 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

netlink: fix NETLINK_RECV_NO_ENOBUFS in netlink_set_err()

2010-04-01T23:02:08+00:00

[ Upstream commit 1a50307ba1826e4da0024e64b245ce4eadf7688a ]

Currently, ENOBUFS errors are reported to the socket via
netlink_set_err() even if NETLINK_RECV_NO_ENOBUFS is set. However,
that should not happen. This fixes this problem and it changes the
prototype of netlink_set_err() to return the number of sockets that
have set the NETLINK_RECV_NO_ENOBUFS socket option. This return
value is used in the next patch in these bugfix series.

Signed-off-by: Pablo Neira Ayuso 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

if_tunnel.h: add missing ams/byteorder.h include

2010-04-01T23:01:47+00:00

commit 9bf35c8dddd56f7f247a27346f74f5adc18071f4 upstream.

When compiling userspace application which includes
if_tunnel.h and uses GRE_* defines you will get undefined
reference to __cpu_to_be16.

Fix this by adding missing #include 

Signed-off-by: Paulius Zaleckas 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

kfifo: fix KFIFO_INIT in include/linux/kfifo.h

2010-04-01T23:01:46+00:00

commit 4c87684d32e8f95715d53039dcd2d998dc63d1eb upstream.

include/linux/kfifo.h first defines and then undefines __kfifo_initializer
which is used by INIT_KFIFO (which is also a macro, so building a module
which uses INIT_KFIFO will fail).

Signed-off-by: David Härdeman 
Acked-by: Stefani Seibold 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

tty: Take a 256 byte padding into account when buffering below sub-page units

2010-04-01T23:01:35+00:00

commit 352fa6ad16b89f8ffd1a93b4419b1a8f2259feab upstream.

The TTY layer takes some care to ensure that only sub-page allocations
are made with interrupts disabled. It does this by setting a goal of
"TTY_BUFFER_PAGE" to allocate. Unfortunately, while TTY_BUFFER_PAGE takes the
size of tty_buffer into account, it fails to account that tty_buffer_find()
rounds the buffer size out to the next 256 byte boundary before adding on
the size of the tty_buffer.

This patch adjusts the TTY_BUFFER_PAGE calculation to take into account the
size of the tty_buffer and the padding. Once applied, tty_buffer_alloc()
should not require high-order allocations.

Signed-off-by: Mel Gorman 
Signed-off-by: Greg Kroah-Hartman

tty: Keep the default buffering to sub-page units

2010-04-01T23:01:35+00:00

commit d9661adfb8e53a7647360140af3b92284cbe52d4 upstream.

We allocate during interrupts so while our buffering is normally diced up
small anyway on some hardware at speed we can pressure the VM excessively
for page pairs. We don't really need big buffers to be linear so don't try
so hard.

In order to make this work well we will tidy up excess callers to request_room,
which cannot itself enforce this break up.

Signed-off-by: Alan Cox 
Signed-off-by: Greg Kroah-Hartman

perf: Provide generic perf_sample_data initialization

2010-04-01T23:01:29+00:00

This makes it easier to extend perf_sample_data and fixes a bug on arm
and sparc, which failed to set ->raw to NULL, which can cause crashes
when combined with PERF_SAMPLE_RAW.

It also optimizes PowerPC and tracepoint, because the struct
initialization is forced to zero out the whole structure.

Signed-off-by: Peter Zijlstra 
Acked-by: Jean Pihet 
Reviewed-by: Frederic Weisbecker 
Acked-by: David S. Miller 
Cc: Jamie Iles 
Cc: Paul Mackerras 
Cc: Stephane Eranian 
LKML-Reference: <20100304140100.315416040@chello.nl>
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman