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Roland Dreier baaad380c0 IB/mthca: Avoid changing userspace ABI to handle DMA write barrier attribute 
Commit cb9fbc5c ("IB: expand ib_umem_get() prototype") changed the
mthca userspace ABI to provide a way for userspace to indicate which
memory regions need the DMA write barrier attribute.  However, it is
possible to handle this without breaking existing userspace, by having
the mthca kernel driver recognize whether it is talking to old or new
userspace, depending on the size of the register MR structure passed in.

The only potential drawback of this is that is allows old userspace
(which has a bug with DMA ordering on large SGI Altix systems) to
continue to run on new kernels, but the advantage of allowing old
userspace to continue to work on unaffected systems seems to outweigh
this, and we can print a warning to push people to upgrade their
userspace.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-04-29 13:46:53 -07:00
..
acorn/char
acpi Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-bigbox-pci 2008-04-29 08:26:51 -07:00
amba
ata Fix bug - Implement bfin ata interrupt handler to avoid "irq 68 nobody cared" (v2) 2008-04-29 02:17:18 -04:00
atm drivers: atm, char fix integer as NULL pointer warnings 2008-04-28 17:29:18 -07:00
auxdisplay
base Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-bigbox-pci 2008-04-29 08:26:51 -07:00
block Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 2008-04-29 08:18:03 -07:00
bluetooth hci_usb: remove code obfuscation 2008-04-19 18:17:26 -07:00
cdrom Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 2008-04-29 08:18:03 -07:00
char Merge branch 'audit.b50' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current 2008-04-29 11:41:22 -07:00
clocksource
connector
cpufreq [CPUFREQ] state info wrong after resume 2008-04-28 16:27:08 -04:00
cpuidle
crypto [CRYPTO] padlock-aes: Use generic setkey function 2008-04-21 10:19:34 +08:00
dca
dio
dma DMA engine: typo fixes 2008-04-21 22:38:45 +00:00
edac edac: fix module initialization on several modules 2nd time 2008-04-29 08:06:26 -07:00
eisa
firewire Convert asm/semaphore.h users to linux/semaphore.h 2008-04-18 22:22:54 -04:00
firmware edd: add default mode CONFIG_EDD_OFF=n, override with edd={on,off} 2008-04-29 08:06:23 -07:00
gpio gpiochip_reserve() 2008-04-28 08:58:34 -07:00
hid hid-core: use get_unaligned_* helpers 2008-04-29 08:06:27 -07:00
hwmon
i2c i2c: Fix platform driver hotplug/coldplug 2008-04-22 22:16:49 +02:00
ide Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 2008-04-29 08:18:03 -07:00
ieee1394 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2008-04-25 12:24:06 -07:00
infiniband IB/mthca: Avoid changing userspace ABI to handle DMA write barrier attribute 2008-04-29 13:46:53 -07:00
input input: use get_unaligned_* helpers 2008-04-29 08:06:27 -07:00
isdn isdn: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
leds Remove duplicated unlikely() in IS_ERR() 2008-04-29 08:06:25 -07:00
lguest drivers: Remove unnecessary inclusions of asm/semaphore.h 2008-04-18 22:16:32 -04:00
macintosh [POWERPC] windfarm: Add PowerMac 12,1 support 2008-04-29 15:57:35 +10:00
mca proc: remove proc_root from drivers 2008-04-29 08:06:18 -07:00
md dm: use unlocked variants of queue flag check/set 2008-04-29 10:21:12 -07:00
media drivers: use non-racy method for proc entries creation (2) 2008-04-29 08:06:22 -07:00
memstick memstick: convert struct class_device to struct device 2008-04-19 19:10:29 -07:00
message Remove duplicated unlikely() in IS_ERR() 2008-04-29 08:06:25 -07:00
mfd mfd: use shorter set_current_state() 2008-04-28 08:58:32 -07:00
misc drivers: use non-racy method for proc entries creation (2) 2008-04-29 08:06:22 -07:00
mmc mmc: use get/put_unaligned_* helpers 2008-04-29 08:06:27 -07:00
mtd drivers: fix integer as NULL pointer warnings 2008-04-28 17:31:13 -07:00
net mlx4_core: Avoid recycling old FMR R_Keys too soon 2008-04-29 13:46:53 -07:00
nubus proc: convert /proc/bus/nubus to seq_file interface 2008-04-29 08:06:19 -07:00
of [POWERPC] drivers/of/of_i2c.c: Add MODULE_LICENSE 2008-04-24 20:58:01 +10:00
oprofile oprofile: change cpu_buffer from array to per_cpu variable 2008-04-28 08:58:31 -07:00
parisc parisc: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
parport parport_pc: wrap PNP probe code in #ifdef CONFIG_PNP 2008-04-29 08:06:26 -07:00
pci Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2008-04-29 10:17:59 -07:00
pcmcia drivers/pcmcia/pcmcia_ioctl.c: fix build 2008-04-29 11:00:39 -07:00
pnp drivers: use non-racy method for proc entries creation (2) 2008-04-29 08:06:22 -07:00
power x86: olpc: add One Laptop Per Child architecture support 2008-04-29 08:06:07 -07:00
ps3
rapidio [RAPIDIO] Auto-probe the RapidIO system size 2008-04-29 19:40:28 +10:00
rtc Remove duplicated unlikely() in IS_ERR() 2008-04-29 08:06:25 -07:00
s390 s390: use non-racy method for proc entries creation 2008-04-29 08:06:21 -07:00
sbus
scsi Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block 2008-04-29 08:18:03 -07:00
serial Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus 2008-04-28 10:51:43 -07:00
sh
sn
spi spi: spi_imx updates 2008-04-28 08:58:31 -07:00
ssb ssb: Fix all-ones boardflags 2008-04-23 21:25:35 -04:00
tc
telephony
thermal
uio UIO: hold a reference to the device's owner while the device is open 2008-04-19 19:10:18 -07:00
usb usb: use get/put_unaligned_* helpers 2008-04-29 08:06:28 -07:00
video video: use get/put_unaligned_* helpers 2008-04-29 08:06:28 -07:00
virtio
w1
watchdog Convert asm/semaphore.h users to linux/semaphore.h 2008-04-18 22:22:54 -04:00
xen xen: add balloon driver 2008-04-24 23:57:33 +02:00
zorro zorro: use non-racy method for proc entries creation 2008-04-29 08:06:21 -07:00
Kconfig xen: add balloon driver 2008-04-24 23:57:33 +02:00
Makefile