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r: 298912
b: refs/heads/master
c: a9e1e53
h: refs/heads/master
v: v3
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Linus Torvalds committed Apr 10, 2012
1 parent 84a4b4c commit b3aeda8
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2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: d657784b70ef653350d7aa49da90a8484c29da7d
refs/heads/master: a9e1e53bcfb29b3b503a5e75ce498d9a64f32c1e
18 changes: 18 additions & 0 deletions trunk/Documentation/DMA-attributes.txt
Original file line number Diff line number Diff line change
Expand Up @@ -31,3 +31,21 @@ may be weakly ordered, that is that reads and writes may pass each other.
Since it is optional for platforms to implement DMA_ATTR_WEAK_ORDERING,
those that do not will simply ignore the attribute and exhibit default
behavior.

DMA_ATTR_WRITE_COMBINE
----------------------

DMA_ATTR_WRITE_COMBINE specifies that writes to the mapping may be
buffered to improve performance.

Since it is optional for platforms to implement DMA_ATTR_WRITE_COMBINE,
those that do not will simply ignore the attribute and exhibit default
behavior.

DMA_ATTR_NON_CONSISTENT
-----------------------

DMA_ATTR_NON_CONSISTENT lets the platform to choose to return either
consistent or non-consistent memory as it sees fit. By using this API,
you are guaranteeing to the platform that you have all the correct and
necessary sync points for this memory in the driver.
10 changes: 5 additions & 5 deletions trunk/Documentation/devicetree/bindings/mtd/atmel-nand.txt
Original file line number Diff line number Diff line change
Expand Up @@ -27,13 +27,13 @@ nand0: nand@40000000,0 {
reg = <0x40000000 0x10000000
0xffffe800 0x200
>;
atmel,nand-addr-offset = <21>;
atmel,nand-cmd-offset = <22>;
atmel,nand-addr-offset = <21>; /* ale */
atmel,nand-cmd-offset = <22>; /* cle */
nand-on-flash-bbt;
nand-ecc-mode = "soft";
gpios = <&pioC 13 0
&pioC 14 0
0
gpios = <&pioC 13 0 /* rdy */
&pioC 14 0 /* nce */
0 /* cd */
>;
partition@0 {
...
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31 changes: 15 additions & 16 deletions trunk/Documentation/networking/driver.txt
Original file line number Diff line number Diff line change
Expand Up @@ -2,16 +2,16 @@ Document about softnet driver issues

Transmit path guidelines:

1) The hard_start_xmit method must never return '1' under any
normal circumstances. It is considered a hard error unless
1) The ndo_start_xmit method must not return NETDEV_TX_BUSY under
any normal circumstances. It is considered a hard error unless
there is no way your device can tell ahead of time when it's
transmit function will become busy.

Instead it must maintain the queue properly. For example,
for a driver implementing scatter-gather this means:

static int drv_hard_start_xmit(struct sk_buff *skb,
struct net_device *dev)
static netdev_tx_t drv_hard_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct drv *dp = netdev_priv(dev);

Expand All @@ -23,7 +23,7 @@ Transmit path guidelines:
unlock_tx(dp);
printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
dev->name);
return 1;
return NETDEV_TX_BUSY;
}

... queue packet to card ...
Expand All @@ -35,6 +35,7 @@ Transmit path guidelines:
...
unlock_tx(dp);
...
return NETDEV_TX_OK;
}

And then at the end of your TX reclamation event handling:
Expand All @@ -58,24 +59,22 @@ Transmit path guidelines:
TX_BUFFS_AVAIL(dp) > 0)
netif_wake_queue(dp->dev);

2) Do not forget to update netdev->trans_start to jiffies after
each new tx packet is given to the hardware.

3) A hard_start_xmit method must not modify the shared parts of a
2) An ndo_start_xmit method must not modify the shared parts of a
cloned SKB.

4) Do not forget that once you return 0 from your hard_start_xmit
method, it is your driver's responsibility to free up the SKB
and in some finite amount of time.
3) Do not forget that once you return NETDEV_TX_OK from your
ndo_start_xmit method, it is your driver's responsibility to free
up the SKB and in some finite amount of time.

For example, this means that it is not allowed for your TX
mitigation scheme to let TX packets "hang out" in the TX
ring unreclaimed forever if no new TX packets are sent.
This error can deadlock sockets waiting for send buffer room
to be freed up.

If you return 1 from the hard_start_xmit method, you must not keep
any reference to that SKB and you must not attempt to free it up.
If you return NETDEV_TX_BUSY from the ndo_start_xmit method, you
must not keep any reference to that SKB and you must not attempt
to free it up.

Probing guidelines:

Expand All @@ -85,10 +84,10 @@ Probing guidelines:

Close/stop guidelines:

1) After the dev->stop routine has been called, the hardware must
1) After the ndo_stop routine has been called, the hardware must
not receive or transmit any data. All in flight packets must
be aborted. If necessary, poll or wait for completion of
any reset commands.

2) The dev->stop routine will be called by unregister_netdevice
2) The ndo_stop routine will be called by unregister_netdevice
if device is still UP.
11 changes: 2 additions & 9 deletions trunk/Documentation/networking/ip-sysctl.txt
Original file line number Diff line number Diff line change
Expand Up @@ -604,15 +604,8 @@ IP Variables:
ip_local_port_range - 2 INTEGERS
Defines the local port range that is used by TCP and UDP to
choose the local port. The first number is the first, the
second the last local port number. Default value depends on
amount of memory available on the system:
> 128Mb 32768-61000
< 128Mb 1024-4999 or even less.
This number defines number of active connections, which this
system can issue simultaneously to systems not supporting
TCP extensions (timestamps). With tcp_tw_recycle enabled
(i.e. by default) range 1024-4999 is enough to issue up to
2000 connections per second to systems supporting timestamps.
second the last local port number. The default values are
32768 and 61000 respectively.

ip_local_reserved_ports - list of comma separated ranges
Specify the ports which are reserved for known third-party
Expand Down
25 changes: 12 additions & 13 deletions trunk/Documentation/networking/netdevices.txt
Original file line number Diff line number Diff line change
Expand Up @@ -47,26 +47,25 @@ packets is preferred.

struct net_device synchronization rules
=======================================
dev->open:
ndo_open:
Synchronization: rtnl_lock() semaphore.
Context: process

dev->stop:
ndo_stop:
Synchronization: rtnl_lock() semaphore.
Context: process
Note1: netif_running() is guaranteed false
Note2: dev->poll() is guaranteed to be stopped
Note: netif_running() is guaranteed false

dev->do_ioctl:
ndo_do_ioctl:
Synchronization: rtnl_lock() semaphore.
Context: process

dev->get_stats:
ndo_get_stats:
Synchronization: dev_base_lock rwlock.
Context: nominally process, but don't sleep inside an rwlock

dev->hard_start_xmit:
Synchronization: netif_tx_lock spinlock.
ndo_start_xmit:
Synchronization: __netif_tx_lock spinlock.

When the driver sets NETIF_F_LLTX in dev->features this will be
called without holding netif_tx_lock. In this case the driver
Expand All @@ -87,20 +86,20 @@ dev->hard_start_xmit:
o NETDEV_TX_LOCKED Locking failed, please retry quickly.
Only valid when NETIF_F_LLTX is set.

dev->tx_timeout:
Synchronization: netif_tx_lock spinlock.
ndo_tx_timeout:
Synchronization: netif_tx_lock spinlock; all TX queues frozen.
Context: BHs disabled
Notes: netif_queue_stopped() is guaranteed true

dev->set_rx_mode:
Synchronization: netif_tx_lock spinlock.
ndo_set_rx_mode:
Synchronization: netif_addr_lock spinlock.
Context: BHs disabled

struct napi_struct synchronization rules
========================================
napi->poll:
Synchronization: NAPI_STATE_SCHED bit in napi->state. Device
driver's dev->close method will invoke napi_disable() on
driver's ndo_stop method will invoke napi_disable() on
all NAPI instances which will do a sleeping poll on the
NAPI_STATE_SCHED napi->state bit, waiting for all pending
NAPI activity to cease.
Expand Down
54 changes: 29 additions & 25 deletions trunk/MAINTAINERS
Original file line number Diff line number Diff line change
Expand Up @@ -228,7 +228,7 @@ M: Len Brown <lenb@kernel.org>
L: linux-acpi@vger.kernel.org
W: http://www.lesswatts.org/projects/acpi/
Q: http://patchwork.kernel.org/project/linux-acpi/list/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6.git
T: git git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
S: Supported
F: drivers/acpi/
F: drivers/pnp/pnpacpi/
Expand Down Expand Up @@ -2450,53 +2450,53 @@ F: fs/ecryptfs/

EDAC-CORE
M: Doug Thompson <dougthompson@xmission.com>
L: bluesmoke-devel@lists.sourceforge.net (moderated for non-subscribers)
L: linux-edac@vger.kernel.org
W: bluesmoke.sourceforge.net
S: Supported
F: Documentation/edac.txt
F: drivers/edac/edac_*
F: drivers/edac/
F: include/linux/edac.h

EDAC-AMD64
M: Doug Thompson <dougthompson@xmission.com>
M: Borislav Petkov <borislav.petkov@amd.com>
L: bluesmoke-devel@lists.sourceforge.net (moderated for non-subscribers)
L: linux-edac@vger.kernel.org
W: bluesmoke.sourceforge.net
S: Supported
F: drivers/edac/amd64_edac*

EDAC-E752X
M: Mark Gross <mark.gross@intel.com>
M: Doug Thompson <dougthompson@xmission.com>
L: bluesmoke-devel@lists.sourceforge.net (moderated for non-subscribers)
L: linux-edac@vger.kernel.org
W: bluesmoke.sourceforge.net
S: Maintained
F: drivers/edac/e752x_edac.c

EDAC-E7XXX
M: Doug Thompson <dougthompson@xmission.com>
L: bluesmoke-devel@lists.sourceforge.net (moderated for non-subscribers)
L: linux-edac@vger.kernel.org
W: bluesmoke.sourceforge.net
S: Maintained
F: drivers/edac/e7xxx_edac.c

EDAC-I82443BXGX
M: Tim Small <tim@buttersideup.com>
L: bluesmoke-devel@lists.sourceforge.net (moderated for non-subscribers)
L: linux-edac@vger.kernel.org
W: bluesmoke.sourceforge.net
S: Maintained
F: drivers/edac/i82443bxgx_edac.c

EDAC-I3000
M: Jason Uhlenkott <juhlenko@akamai.com>
L: bluesmoke-devel@lists.sourceforge.net (moderated for non-subscribers)
L: linux-edac@vger.kernel.org
W: bluesmoke.sourceforge.net
S: Maintained
F: drivers/edac/i3000_edac.c

EDAC-I5000
M: Doug Thompson <dougthompson@xmission.com>
L: bluesmoke-devel@lists.sourceforge.net (moderated for non-subscribers)
L: linux-edac@vger.kernel.org
W: bluesmoke.sourceforge.net
S: Maintained
F: drivers/edac/i5000_edac.c
Expand Down Expand Up @@ -2525,21 +2525,21 @@ F: drivers/edac/i7core_edac.c
EDAC-I82975X
M: Ranganathan Desikan <ravi@jetztechnologies.com>
M: "Arvind R." <arvino55@gmail.com>
L: bluesmoke-devel@lists.sourceforge.net (moderated for non-subscribers)
L: linux-edac@vger.kernel.org
W: bluesmoke.sourceforge.net
S: Maintained
F: drivers/edac/i82975x_edac.c

EDAC-PASEMI
M: Egor Martovetsky <egor@pasemi.com>
L: bluesmoke-devel@lists.sourceforge.net (moderated for non-subscribers)
L: linux-edac@vger.kernel.org
W: bluesmoke.sourceforge.net
S: Maintained
F: drivers/edac/pasemi_edac.c

EDAC-R82600
M: Tim Small <tim@buttersideup.com>
L: bluesmoke-devel@lists.sourceforge.net (moderated for non-subscribers)
L: linux-edac@vger.kernel.org
W: bluesmoke.sourceforge.net
S: Maintained
F: drivers/edac/r82600_edac.c
Expand Down Expand Up @@ -4309,6 +4309,13 @@ W: http://www.kernel.org/doc/man-pages
L: linux-man@vger.kernel.org
S: Maintained

MARVELL GIGABIT ETHERNET DRIVERS (skge/sky2)
M: Mirko Lindner <mlindner@marvell.com>
M: Stephen Hemminger <shemminger@vyatta.com>
L: netdev@vger.kernel.org
S: Maintained
F: drivers/net/ethernet/marvell/sk*

MARVELL LIBERTAS WIRELESS DRIVER
M: Dan Williams <dcbw@redhat.com>
L: libertas-dev@lists.infradead.org
Expand Down Expand Up @@ -4339,12 +4346,6 @@ M: Nicolas Pitre <nico@fluxnic.net>
S: Odd Fixes
F: drivers/mmc/host/mvsdio.*

MARVELL YUKON / SYSKONNECT DRIVER
M: Mirko Lindner <mlindner@syskonnect.de>
M: Ralph Roesler <rroesler@syskonnect.de>
W: http://www.syskonnect.com
S: Supported

MATROX FRAMEBUFFER DRIVER
L: linux-fbdev@vger.kernel.org
S: Orphan
Expand Down Expand Up @@ -5637,7 +5638,7 @@ M: Ohad Ben-Cohen <ohad@wizery.com>
S: Maintained
F: drivers/remoteproc/
F: Documentation/remoteproc.txt
F: include/linux/remoteproc.txt
F: include/linux/remoteproc.h

RFKILL
M: Johannes Berg <johannes@sipsolutions.net>
Expand Down Expand Up @@ -6116,12 +6117,6 @@ W: http://www.winischhofer.at/linuxsisusbvga.shtml
S: Maintained
F: drivers/usb/misc/sisusbvga/

SKGE, SKY2 10/100/1000 GIGABIT ETHERNET DRIVERS
M: Stephen Hemminger <shemminger@vyatta.com>
L: netdev@vger.kernel.org
S: Maintained
F: drivers/net/ethernet/marvell/sk*

SLAB ALLOCATOR
M: Christoph Lameter <cl@linux-foundation.org>
M: Pekka Enberg <penberg@kernel.org>
Expand Down Expand Up @@ -6287,6 +6282,15 @@ F: drivers/tty/serial/sunsu.c
F: drivers/tty/serial/sunzilog.c
F: drivers/tty/serial/sunzilog.h

SPARSE CHECKER
M: "Christopher Li" <sparse@chrisli.org>
L: linux-sparse@vger.kernel.org
W: https://sparse.wiki.kernel.org/
T: git git://git.kernel.org/pub/scm/devel/sparse/sparse.git
T: git git://git.kernel.org/pub/scm/devel/sparse/chrisl/sparse.git
S: Maintained
F: include/linux/compiler.h

SPEAR PLATFORM SUPPORT
M: Viresh Kumar <viresh.kumar@st.com>
L: spear-devel@list.st.com
Expand Down
2 changes: 1 addition & 1 deletion trunk/Makefile
Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
VERSION = 3
PATCHLEVEL = 4
SUBLEVEL = 0
EXTRAVERSION = -rc1
EXTRAVERSION = -rc2
NAME = Saber-toothed Squirrel

# *DOCUMENTATION*
Expand Down
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