Shirley Ma a6686f2f38 skbuff: skb supports zero-copy buffers ... This patch adds userspace buffers support in skb shared info. A new struct skb_ubuf_info is needed to maintain the userspace buffers argument and index, a callback is used to notify userspace to release the buffers once lower device has done DMA (Last reference to that skb has gone). If there is any userspace apps to reference these userspace buffers, then these userspaces buffers will be copied into kernel. This way we can prevent userspace apps from holding these userspace buffers too long. Use destructor_arg to point to the userspace buffer info; a new tx flags SKBTX_DEV_ZEROCOPY is added for zero-copy buffer check. Signed-off-by: Shirley Ma <xma@...ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2011-07-07 04:41:13 -07:00
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acpi	Merge branches 'acpica', 'aml-custom', 'bugzilla-16548', 'bugzilla-20242', 'd3-cold', 'ec-asus' and 'thermal-fix' into release	2011-05-29 04:38:48 -04:00
asm-generic	Merge branches 'gpio/merge' and 'spi/merge' of git://git.secretlab.ca/git/linux-2.6	2011-06-17 10:36:32 -07:00
crypto	net: remove mm.h inclusion from netdevice.h	2011-06-21 19:17:20 -07:00
drm	drm/radeon: workaround a hw bug on some radeon chipsets with all-0 EDIDs.	2011-06-16 16:30:54 +10:00
keys
linux	skbuff: skb supports zero-copy buffers	2011-07-07 04:41:13 -07:00
math-emu
media	[media] v4l: Fix media_entity_to_video_device macro argument name	2011-06-01 09:42:03 -03:00
mtd
net	sock.h: Add a new sock zero-copy flag	2011-07-07 04:40:21 -07:00
pcmcia
rdma
rxrpc
scsi
sound	ASoC: Remove unused and about to be broken SND_SOC_CUSTOM I/O bus	2011-06-13 19:17:55 +01:00
target
trace	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2011-07-05 23:23:37 -07:00
video
xen
Kbuild