Tejun Heo c995905916 block: fix diskstats access ... There are two variants of stat functions - ones prefixed with double underbars which don't care about preemption and ones without which disable preemption before manipulating per-cpu counters. It's unclear whether the underbarred ones assume that preemtion is disabled on entry as some callers don't do that. This patch unifies diskstats access by implementing disk_stat_lock() and disk_stat_unlock() which take care of both RCU (for partition access) and preemption (for per-cpu counter access). diskstats access should always be enclosed between the two functions. As such, there's no need for the versions which disables preemption. They're removed and double underbars ones are renamed to drop the underbars. As an extra argument is added, there's no danger of using the old version unconverted. disk_stat_lock() uses get_cpu() and returns the cpu index and all diskstat functions which access per-cpu counters now has @cpu argument to help RT. This change adds RCU or preemption operations at some places but also collapses several preemption ops into one at others. Overall, the performance difference should be negligible as all involved ops are very lightweight per-cpu ones. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>		2008-10-09 08:56:06 +02:00
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accessibility	braille_console: only register notifiers when the braille console is used	2008-10-02 15:53:13 -07:00
acpi	ACPI: Make /proc/acpi/wakeup interface handle PCI devices (again)	2008-10-03 18:22:19 -07:00
amba	…
ata	sata_nv: reinstate nv_hardreset() for non generic controllers	2008-09-29 00:14:34 -04:00
atm	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -07:00
auxdisplay	…
base	driver-core: use klist for class device list and implement iterator	2008-10-09 08:56:04 +02:00
block	block: fix diskstats access	2008-10-09 08:56:06 +02:00
bluetooth	[Bluetooth] Add reset quirk for A-Link BlueUSB21 dongle	2008-10-06 12:22:52 +02:00
cdrom	cdrom: handle TOC	2008-08-18 21:40:04 +02:00
char	block: don't depend on consecutive minor space	2008-10-09 08:56:05 +02:00
clocksource	clocksource, acpi_pm.c: fix check for monotonicity	2008-09-11 11:14:29 +02:00
connector	…
cpufreq	[CPUFREQ] Fix -Wshadow warning in conservative governor.	2008-08-08 16:00:48 -04:00
cpuidle	cpuidle: Make ladder governor honor latency requirements fully	2008-08-15 21:25:35 +02:00
crypto	crypto: talitos - Avoid consecutive packets going out with same IV	2008-09-14 13:41:19 -07:00
dca	…
dio	…
dma	dw_dmac: fix copy/paste bug in tasklet	2008-10-03 18:22:18 -07:00
edac	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -07:00
eisa	…
firewire	firewire: Kconfig help update	2008-08-19 18:47:56 +02:00
firmware	ibft: fix target info parsing in ibft module	2008-09-02 19:21:40 -07:00
gpio	gpio: max732x driver	2008-07-25 10:53:30 -07:00
gpu	drm/radeon: downgrade debug message from info to debug.	2008-09-01 08:51:52 +10:00
hid	Input: bcm5974 - add driver for Macbook Air and Pro Penryn touchpads	2008-08-08 16:23:01 -04:00
hwmon	hwmon: (ad7414) Make ad7414_update_device() static	2008-09-20 10:25:20 +02:00
i2c	i2c-dev: Return correct error code on class_create() failure	2008-09-24 13:39:21 +02:00
ide	ide: workaround for bogus gcc warning in ide_sysfs_register_port()	2008-10-05 18:23:28 +02:00
ieee1394	ieee1394: sbp2: let nodemgr retry node updates during bus reset series	2008-08-19 18:47:56 +02:00
infiniband	IPoIB: Fix crash when path record fails after path flush	2008-09-25 16:37:03 -07:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2008-09-22 07:46:06 -07:00
isdn	Add DIP switch readout for HFC-4S IOB4ST	2008-08-02 16:40:37 +02:00
leds	leds-pca955x: add proper error handling and fix bogus memory handling	2008-10-03 18:22:18 -07:00
lguest	lguest: update commentry	2008-08-26 00:19:28 +10:00
macintosh	remove unnecessary <linux/hdreg.h> includes	2008-08-05 18:16:58 +02:00
mca	…
md	block: fix diskstats access	2008-10-09 08:56:06 +02:00
media	Revert "V4L/DVB (8904): cx88: add missing unlock_kernel"	2008-10-07 07:54:34 -07:00
memstick	block: don't depend on consecutive minor space	2008-10-09 08:56:05 +02:00
message	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2008-07-27 10:04:52 -07:00
mfd	mfd: Fix asic3 compilation	2008-09-30 09:57:22 +02:00
misc	ia64: fix panic during `modprobe -r xpc'	2008-09-13 14:41:52 -07:00
mmc	block: don't depend on consecutive minor space	2008-10-09 08:56:05 +02:00
mtd	Support 'discard sectors' operation.	2008-10-09 08:56:01 +02:00
net	e1000e: Fix incorrect debug warning	2008-10-03 09:18:17 -07:00
nubus	…
of	powerpc/ibmebus: Restore "name" sysfs attribute on ibmebus devices	2008-08-20 09:50:21 +10:00
oprofile	powerpc/cell/oprofile: Avoid double vfree of profile buffer	2008-08-26 10:24:46 +10:00
parisc	…
parport	make parport_cs_release() static	2008-07-26 12:00:11 -07:00
pci	Check mapped ranges on sysfs resource files	2008-10-02 18:52:51 -07:00
pcmcia	pcmcia: Fix broken abuse of dev->driver_data	2008-09-22 08:42:50 -07:00
pnp	PNPACPI: ignore the producer/consumer bit for extended IRQ descriptors	2008-08-25 12:04:44 +02:00
power	[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach	2008-08-07 09:55:48 +01:00
ps3	…
rapidio	…
regulator	regulator: TI bq24022 Li-Ion Charger driver	2008-07-30 10:10:23 +01:00
rtc	rtc: fix kernel panic on second use of SIGIO nofitication	2008-10-03 18:22:17 -07:00
s390	block: don't depend on consecutive minor space	2008-10-09 08:56:05 +02:00
sbus	sparc/drivers: use linux/of_device.h instead of asm/of_device.h	2008-08-11 14:30:53 -07:00
scsi	block: don't depend on consecutive minor space	2008-10-09 08:56:05 +02:00
serial	atmel_serial: update the powersave handler to match serial core	2008-09-23 08:09:14 -07:00
sh	sh: Fix up broken kerneldoc comments.	2008-08-04 12:51:06 +09:00
sn	…
spi	orion_spi: fix handling of default transfer speed	2008-10-03 18:22:18 -07:00
ssb	[SSB] Initialise dma_mask for SSB_BUSTYPE_SSB devices	2008-09-27 15:45:37 +01:00
tc	…
telephony	ixj: push BKL into driver and wrap ioctls	2008-07-25 10:53:43 -07:00
thermal	…
uio	UIO: generic irq handling for some uio platform devices	2008-08-21 10:15:39 -07:00
usb	USB: revert recovery from transient errors	2008-09-23 13:58:10 -07:00
video	fbdev: fix recursive notifier and locking when fbdev console is blanked	2008-10-03 18:22:17 -07:00
virtio	virtio_balloon: fix towards_target when deflating balloon	2008-08-26 00:19:25 +10:00
w1	…
watchdog	ibmasr: remove unnecessary spin_unlock()	2008-09-23 08:09:13 -07:00
xen	xen: fix 2.6.27-rc5 xen balloon driver warnings	2008-09-08 20:21:15 +02:00
zorro	…
Kconfig	…
Makefile	USB: Add MUSB and TUSB support	2008-08-13 17:33:00 -07:00