Michael S. Tsirkin 6a65d26385 asm-generic: implement virt_xxx memory barriers ... Guests running within virtual machines might be affected by SMP effects even if the guest itself is compiled without SMP support. This is an artifact of interfacing with an SMP host while running an UP kernel. Using mandatory barriers for this use-case would be possible but is often suboptimal. In particular, virtio uses a bunch of confusing ifdefs to work around this, while xen just uses the mandatory barriers. To better handle this case, low-level virt_mb() etc macros are made available. These are implemented trivially using the low-level __smp_xxx macros, the purpose of these wrappers is to annotate those specific cases. These have the same effect as smp_mb() etc when SMP is enabled, but generate identical code for SMP and non-SMP systems. For example, virtual machine guests should use virt_mb() rather than smp_mb() when synchronizing against a (possibly SMP) host. Suggested-by: David Miller <davem@davemloft.net> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>		2016-01-12 20:46:59 +02:00
..
ABI	SCSI misc on 20151113	2015-11-13 20:35:54 -08:00
DocBook	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2015-11-10 09:33:06 -08:00
EDID	…
PCI	The documentation tree update for 4.1. Numerous fixes, the overdue removal	2015-04-18 11:10:49 -04:00
RCU	Merge branches 'doc.2015.10.06a', 'percpu-rwsem.2015.10.06a' and 'torture.2015.10.06a' into HEAD	2015-10-07 16:06:25 -07:00
accounting	…
acpi	mfd: core: redo ACPI matching of the children devices	2015-10-26 15:25:53 +01:00
aoe	…
arm	ARM: dts: keystone: k2l: fix kernel crash when clk_ignore_unused is not in bootargs	2015-11-23 10:36:27 -08:00
arm64	arm64 updates for 4.4:	2015-11-04 14:47:13 -08:00
auxdisplay	…
backlight	…
blackfin	Docs: blackfin: Use new switch macro SAMPLE_IRQ_TIMER instead of IRQ_TIMER5	2015-05-07 09:35:14 -06:00
block	null_blk: register as a LightNVM device	2015-11-16 15:22:28 -07:00
blockdev	zram: update documentation	2015-09-24 15:39:42 -06:00
bus-devices	…
cdrom	…
cgroups	There is a nice new document from Neil on how pathname lookups work and	2015-11-05 15:59:24 -08:00
cma	cma: debug: document new debugfs interface	2015-04-14 16:49:00 -07:00
connector	…
console	…
cpu-freq	cpufreq: remove redundant CPUFREQ_INCOMPATIBLE notifier event	2015-09-01 15:50:38 +02:00
cpuidle	…
cris	…
crypto	KEYS: Merge the type-specific data with the payload data	2015-10-21 15:18:36 +01:00
development-process	…
device-mapper	- Revert a dm-multipath change that caused a regression for unprivledged	2015-11-04 21:19:53 -08:00
devicetree	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-12-31 14:40:43 -08:00
dmaengine	Documentation: dmaengine: Add DMA_CTRL_REUSE documentation	2015-08-17 13:46:22 +05:30
driver-model	driver-core: platform: Provide helpers for multi-driver modules	2015-10-05 05:02:40 +01:00
dvb	…
early-userspace	…
extcon	…
fault-injection	futex: Fault/error injection capabilities	2015-07-20 11:45:45 +02:00
fb	Documentation/fb: add documentation for sm712fb	2015-08-07 15:05:01 -07:00
features	arm64 updates for 4.4:	2015-11-04 14:47:13 -08:00
filesystems	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-11-13 20:04:17 -08:00
firmware_class	…
fmc	…
fpga	usage documentation for FPGA manager core	2015-10-07 18:07:20 +01:00
frv	…
gpio	There is a nice new document from Neil on how pathname lookups work and	2015-11-05 15:59:24 -08:00
hid	…
hwmon	ARM: SoC driver updates for v4.4	2015-11-10 15:00:03 -08:00
i2c	i2c: i801: add Intel Lewisburg device IDs	2015-11-20 16:22:21 +01:00
ia64	…
ide	…
infiniband	IB/hfi1: add driver files	2015-08-28 22:59:36 -04:00
input	Input: add userio module	2015-10-27 18:55:31 -07:00
ioctl	char/misc drivers for 4.4-rc1	2015-11-04 22:15:15 -08:00
isdn	…
ja_JP	Doc: ja_JP: Fix typo in HOWTO	2015-06-08 16:43:09 -06:00
kbuild	kbuild: document recursive dependency limitation / resolution	2015-10-08 15:36:16 +02:00
kdump	…
ko_KR	…
laptops	Move freefall program from Documentation/ to tools/	2015-06-08 16:42:07 -06:00
leds	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds	2015-07-01 19:09:11 -07:00
locking	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-11-03 16:10:43 -08:00
m68k	…
memory-devices	…
metag	…
mic	misc: mic: Update MIC host daemon with COSM changes	2015-10-04 12:54:54 +01:00
mips	…
misc-devices	Doc:misc-devices: Fix typo in Documentation/misc-devices	2015-09-18 10:04:24 -06:00
mmc	mmc: core: Remove MMC_CLKGATE	2015-10-26 16:00:09 +01:00
mn10300	…
mtd	…
namespaces	…
netlabel	…
networking	e100.txt: Cleanup license info in kernel doc	2015-12-03 12:58:10 -08:00
nfc	NFC: Fix typo in nfc-hci.txt	2015-06-08 23:15:45 +02:00
nios2	…
nvdimm	libnvdimm: documentation clarifications	2015-11-12 09:55:23 -08:00
nvmem	Documentation: nvmem: add nvmem api level and how-to doc	2015-08-05 13:43:45 -07:00
parisc	…
pcmcia	pcmcia: Fix typo in locking documentation	2015-08-07 14:34:58 +02:00
phy	…
platform	…
power	PCI / PM: Update runtime PM documentation for PCI devices	2015-09-25 02:48:44 +02:00
powerpc	SCSI misc on 20150901	2015-09-02 12:22:54 -07:00
pps	Doc: pps: Fix file name in pps.txt	2015-07-14 12:35:42 -06:00
prctl	Documentation/prctl: don't build tsc tests when cross compiling	2015-06-22 16:05:04 -06:00
pti	…
ptp	testptp: Silence compiler warnings on ppc64	2015-09-29 21:16:56 -07:00
rapidio	…
s390	KVM: s390: remove outdated documentation	2015-07-29 11:02:35 +02:00
scheduler	sched/dl/Documentation: Split Section 3	2015-05-19 08:39:21 +02:00
scsi	st: allow debug output to be enabled or disabled via sysfs	2015-11-09 17:17:27 -08:00
security	KEYS: Merge the type-specific data with the payload data	2015-10-21 15:18:36 +01:00
serial	Documentation: improve line discipline method descriptions	2015-10-05 04:53:26 +01:00
sh	…
sound	ALSA: hda - Remove obsoleted documentation	2015-10-17 18:34:24 +02:00
spi	ARM: pxa: Remove unused clock_enable field from struct pxa2xx_spi_master	2015-09-20 19:37:20 +02:00
sysctl	Documentation/sysctl/vm.txt: fix misleading code reference of overcommit_memory	2015-11-09 15:11:24 -08:00
target	target: use per-attribute show and store methods	2015-10-13 22:17:49 -07:00
thermal	thermal: power_allocator: relax the requirement of two passive trip points	2015-09-14 07:41:45 -07:00
timers	…
tpm	…
trace	Most of the changes are clean ups and small fixes. Some of them have	2015-11-06 13:30:20 -08:00
usb	usb: interface authorization: Documentation part	2015-09-22 12:08:40 -07:00
vDSO	Documentation/vDSO: don't build tests when cross compiling	2015-06-22 16:04:57 -06:00
video4linux	[media] media: videobuf2: Change queue_setup argument	2015-10-20 14:48:39 -02:00
virtual	s390: A bunch of fixes and optimizations for interrupt and time	2015-11-05 16:26:26 -08:00
vm	mm: make compound_head() robust	2015-11-06 17:50:42 -08:00
w1	w1: masters: omap_hdq: add support for 1-wire mode	2015-10-05 04:47:09 +01:00
watchdog	Documentation/watchdog: add timeout and ping rate control to watchdog-test.c	2015-09-09 21:33:36 +02:00
wimax	…
x86	Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-09-01 10:07:40 -07:00
xtensa	…
zh_CN	sysfs.txt: fix pre-kernfs sysfs_dirent reference	2015-09-13 14:38:50 -06:00
00-INDEX	…
BUG-HUNTING	…
Changes	There is a nice new document from Neil on how pathname lookups work and	2015-11-05 15:59:24 -08:00
CodeOfConflict	…
CodingStyle	Documentation: CodingStyle: remove broken links in the References section	2015-07-10 13:54:34 -06:00
DMA-API-HOWTO.txt	Documentation: DMA API: Be more explicit that nents is always the same	2015-09-24 15:50:06 -06:00
DMA-API.txt	dma: remove external references to dma_supported	2015-11-09 15:11:24 -08:00
DMA-ISA-LPC.txt	…
DMA-attributes.txt	…
HOWTO	docs: update HOWTO for 3.x -> 4.x versioning	2015-08-24 11:28:17 -06:00
IPMI.txt	ipmi watchdog : add panic_wdt_timeout parameter	2015-11-16 06:28:43 -06:00
IRQ-affinity.txt	…
IRQ-domain.txt	irqdomain: Documentation updates	2015-10-13 19:01:25 +02:00
IRQ.txt	…
Intel-IOMMU.txt	x86/vt-d: Fix documentation of DRHD	2015-08-25 10:44:49 +02:00
Makefile	…
ManagementStyle	…
SAK.txt	…
SM501.txt	…
SecurityBugs	…
SubmitChecklist	…
SubmittingDrivers	…
SubmittingPatches	A few more documentation patches that wandered in and have no reason to	2015-11-13 09:19:05 -08:00
VGA-softcursor.txt	…
adding-syscalls.txt	Documentation: describe how to add a system call	2015-08-13 17:54:06 -06:00
applying-patches.txt	…
assoc_array.txt	…
atomic_ops.txt	locking/atomics, cmpxchg: Privatize the inclusion of asm/cmpxchg.h	2015-09-13 10:35:46 +02:00
bad_memory.txt	…
basic_profiling.txt	…
bcache.txt	…
binfmt_misc.txt	…
braille-console.txt	…
bt8xxgpio.txt	…
btmrvl.txt	…
bus-virt-phys-mapping.txt	…
cachetlb.txt	…
circular-buffers.txt	…
clk.txt	clk: change clk_ops' ->determine_rate() prototype	2015-07-27 18:12:01 -07:00
coccinelle.txt	…
cpu-hotplug.txt	…
cpu-load.txt	…
cputopology.txt	Documentation: Update cputopology.txt	2015-05-27 15:22:15 +02:00
crc32.txt	…
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	Doc: Change wikipedia's URL from http to https	2015-06-22 10:14:05 -06:00
dell_rbu.txt	…
devices.txt	…
digsig.txt	…
dma-buf-sharing.txt	dma-buf: cleanup dma_buf_export() to make it easily extensible	2015-04-21 14:47:16 +05:30
dontdiff	Documentation: dontdiff: remove media from dontdiff	2015-11-11 10:08:07 -07:00
dynamic-debug-howto.txt	…
edac.txt	Documentation/EDAC: Add reference documents section for amd64_edac	2015-09-29 13:42:41 +02:00
efi-stub.txt	…
eisa.txt	…
email-clients.txt	A few more documentation patches that wandered in and have no reason to	2015-11-13 09:19:05 -08:00
flexible-arrays.txt	…
futex-requeue-pi.txt	…
gcov.txt	…
gdb-kernel-debugging.txt	…
highuid.txt	…
hsi.txt	…
hw_random.txt	hwrng: doc - Fix device node name reference /dev/hw_random => /dev/hwrng	2015-09-21 22:00:41 +08:00
hwspinlock.txt	hwspinlock/core: add device tree support	2015-05-02 09:54:30 +03:00
init.txt	…
initrd.txt	…
intel_txt.txt	…
io-mapping.txt	…
io_ordering.txt	…
iostats.txt	…
irqflags-tracing.txt	…
isapnp.txt	…
java.txt	…
kasan.txt	mm, slub, kasan: enable user tracking by default with KASAN=y	2015-11-05 19:34:48 -08:00
kernel-doc-nano-HOWTO.txt	Documenation: Update location of docproc.c	2015-07-14 12:36:39 -06:00
kernel-docs.txt	kernel-docs.txt: update kernelnewbies reference	2015-10-11 15:36:43 -06:00
kernel-parameters.txt	Merge branches 'pm-cpufreq' and 'acpi-cppc'	2015-11-20 01:22:10 +01:00
kernel-per-CPU-kthreads.txt	…
kmemcheck.txt	…
kmemleak.txt	Doc: Change wikipedia's URL from http to https	2015-06-22 10:14:05 -06:00
kobject.txt	…
kprobes.txt	…
kref.txt	…
kselftest.txt	Documentation: Update kselftest.txt	2015-09-24 15:51:53 -06:00
ldm.txt	…
local_ops.txt	…
lockup-watchdogs.txt	kernel/watchdog.c: add sysctl knob hardlockup_panic	2015-11-05 19:34:48 -08:00
logo.gif	…
logo.txt	…
lzo.txt	…
magic-number.txt	Documentation/magic-number: Remove SCC_MAGIC	2015-05-13 15:39:04 -04:00
mailbox.txt	Documentation: minor typo fix in mailbox.txt	2015-08-13 18:03:18 -06:00
md-cluster.txt	md-cluster: fix deadlock issue on message lock	2015-08-31 19:41:41 +02:00
md.txt	doc:md: fix typo in md.txt.	2015-06-23 06:49:44 -06:00
media-framework.txt	…
memory-barriers.txt	asm-generic: implement virt_xxx memory barriers	2016-01-12 20:46:59 +02:00
memory-hotplug.txt	…
men-chameleon-bus.txt	Documentation: Minor changes to men-chameleon-bus.txt	2015-07-24 15:15:17 +02:00
module-signing.txt	Move certificate handling to its own directory	2015-08-14 16:06:13 +01:00
mono.txt	…
nommu-mmap.txt	…
ntb.txt	NTB: Rename Intel code names to platform names	2015-07-04 14:09:25 -04:00
numastat.txt	…
oops-tracing.txt	…
padata.txt	…
parport-lowlevel.txt	…
parport.txt	…
percpu-rw-semaphore.txt	…
phy.txt	phy: core: Add devm_of_phy_get_by_index to phy-core	2015-05-11 21:42:23 +05:30
pi-futex.txt	…
pinctrl.txt	pinctrl: move strict option to pinmux_ops	2015-05-06 14:45:19 +02:00
pnp.txt	…
preempt-locking.txt	x86/fpu: Rename math_state_restore() to fpu__restore()	2015-05-19 15:47:18 +02:00
printk-formats.txt	lib/vsprintf.c: update documentation	2015-11-06 17:50:42 -08:00
pwm.txt	…
ramoops.txt	…
rbtree.txt	documentation: fix small typo in rbtree.txt	2015-09-13 14:38:50 -06:00
remoteproc.txt	remoteproc: introduce rproc_get_by_phandle API	2015-06-16 21:12:52 +03:00
rfkill.txt	…
robust-futex-ABI.txt	…
robust-futexes.txt	…
rpmsg.txt	…
rtc.txt	…
serial-console.txt	…
sgi-ioc4.txt	…
smsc_ece1099.txt	…
sparse.txt	…
stable_api_nonsense.txt	…
stable_kernel_rules.txt	stable: Update documentation to clarify preferred procedure	2015-05-22 09:38:56 -06:00
static-keys.txt	locking/static_keys: Fix up the static keys documentation	2015-09-15 07:12:06 +02:00
svga.txt	…
sysfs-rules.txt	…
sysrq.txt	mm, oom: do not panic for oom kills triggered from sysrq	2015-09-08 15:35:28 -07:00
this_cpu_ops.txt	…
unaligned-memory-access.txt	…
unicode.txt	…
unshare.txt	…
vfio.txt	vfio: powerpc/spapr: Support Dynamic DMA windows	2015-06-11 15:16:55 +10:00
vgaarbiter.txt	…
video-output.txt	…
vme_api.txt	Documentation: mention vme_master_mmap() in VME API	2015-06-12 17:26:56 -07:00
volatile-considered-harmful.txt	…
workqueue.txt	workqueue: fix trivial typo in Documentation/workqueue.txt	2015-05-05 09:50:38 -04:00
xillybus.txt	…
xz.txt	…
zorro.txt	…