Boaz Harrosh dd9061846a mm: new pfn_mkwrite same as page_mkwrite for VM_PFNMAP ... This will allow FS that uses VM_PFNMAP | VM_MIXEDMAP (no page structs) to get notified when access is a write to a read-only PFN. This can happen if we mmap() a file then first mmap-read from it to page-in a read-only PFN, than we mmap-write to the same page. We need this functionality to fix a DAX bug, where in the scenario above we fail to set ctime/mtime though we modified the file. An xfstest is attached to this patchset that shows the failure and the fix. (A DAX patch will follow) This functionality is extra important for us, because upon dirtying of a pmem page we also want to RDMA the page to a remote cluster node. We define a new pfn_mkwrite and do not reuse page_mkwrite because 1 - The name ;-) 2 - But mainly because it would take a very long and tedious audit of all page_mkwrite functions of VM_MIXEDMAP/VM_PFNMAP users. To make sure they do not now CRASH. For example current DAX code (which this is for) would crash. If we would want to reuse page_mkwrite, We will need to first patch all users, so to not-crash-on-no-page. Then enable this patch. But even if I did that I would not sleep so well at night. Adding a new vector is the safest thing to do, and is not that expensive. an extra pointer at a static function vector per driver. Also the new vector is better for performance, because else we Will call all current Kernel vectors, so to: check-ha-no-page-do-nothing and return. No need to call it from do_shared_fault because do_wp_page is called to change pte permissions anyway. Signed-off-by: Yigal Korman <yigal@plexistor.com> Signed-off-by: Boaz Harrosh <boaz@plexistor.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Matthew Wilcox <matthew.r.wilcox@intel.com> Cc: Jan Kara <jack@suse.cz> Cc: Hugh Dickins <hughd@google.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Dave Chinner <david@fromorbit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-04-15 16:35:20 -07:00
..
ABI	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2015-04-15 09:00:47 -07:00
DocBook	KGDB/KDB New:	2015-02-20 15:13:29 -08:00
EDID	…
PCI	PCI: Clarify policy for vendor IDs in pci.txt	2015-04-09 13:34:02 -05:00
RCU	Merge branches 'doc.2015.01.07a', 'fixes.2015.01.15a', 'preempt.2015.01.06a', 'srcu.2015.01.06a', 'stall.2015.01.16a' and 'torture.2015.01.11a' into HEAD	2015-01-15 23:34:34 -08:00
accounting	…
acpi	Power management and ACPI updates for v4.1-rc1	2015-04-14 20:21:54 -07:00
aoe	…
arm	ARM: SoC platform changes	2015-02-17 09:27:54 -08:00
arm64	arm64: Emulate SETEND for AArch32 tasks	2015-01-23 17:11:44 +00:00
auxdisplay	…
backlight	…
blackfin	Documentation: fix blackfin gptimers-example build errors	2015-01-28 12:07:58 -07:00
block	…
blockdev	…
bus-devices	…
cdrom	…
cgroups	Merge branch 'for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2015-04-13 16:47:11 -07:00
cma	cma: debug: document new debugfs interface	2015-04-14 16:49:00 -07:00
connector	…
console	…
cpu-freq	intel_pstate: Add num_pstates to sysfs	2015-01-30 01:52:17 +01:00
cpuidle	…
cris	…
crypto	…
development-process	…
device-mapper	dm crypt: add 'submit_from_crypt_cpus' option	2015-02-16 11:11:15 -05:00
devicetree	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2015-04-15 09:00:47 -07:00
dmaengine	Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma	2015-02-18 08:49:20 -08:00
driver-model	Staging drivers patches for 3.20-rc1	2015-02-15 11:30:39 -08:00
dvb	…
early-userspace	…
extcon	…
fault-injection	…
fb	…
filesystems	mm: new pfn_mkwrite same as page_mkwrite for VM_PFNMAP	2015-04-15 16:35:20 -07:00
firmware_class	…
fmc	…
frv	…
gpio	gpio: board.txt: Fix the gpio name example	2015-01-28 11:14:00 -07:00
hid	HID: sensor: Update document for custom sensor	2015-04-10 22:22:56 +02:00
hwmon	hwmon: (it87) Add support for IT8620E	2015-04-05 06:01:00 -07:00
i2c	i2c: slave: add documentation for i2c-slave-eeprom	2015-03-27 16:53:39 +01:00
i2o	…
ia64	virtual: Documentation: simplify and generalize paravirt_ops.txt	2015-02-13 17:15:44 +10:30
ide	…
infiniband	…
input	Input: alps - document stick behavior for protocol V2	2015-04-05 11:48:35 -07:00
ioctl	…
isdn	…
ja_JP	…
kbuild	Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2015-02-19 10:31:37 -08:00
kdump	…
ko_KR	…
laptops	…
leds	…
locking	Documentation changes for 3.20	2015-02-11 13:03:11 -08:00
m68k	…
memory-devices	…
metag	…
mic	…
mips	…
misc-devices	Documentation/misc-devices/mei: Fix indentation of embedded code.	2015-01-29 12:56:20 -07:00
mmc	…
mn10300	…
mtd	…
namespaces	…
netlabel	…
networking	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-04-14 15:44:14 -04:00
nfc	…
nios2	…
parisc	…
pcmcia	…
phy	…
platform	…
power	Power management and ACPI updates for v4.1-rc1	2015-04-14 20:21:54 -07:00
powerpc	…
pps	…
prctl	…
pti	…
ptp	…
rapidio	…
s390	s390/docs: Remove section about script debugging from Debugging390.txt	2015-01-15 11:11:14 +01:00
scheduler	doc: brief user documentation for completion	2015-01-30 11:19:25 -07:00
scsi	genirq: Remove the deprecated 'IRQF_DISABLED' request_irq() flag entirely	2015-03-05 20:53:06 +01:00
security	KEYS: Make /proc/keys unconditional if CONFIG_KEYS=y	2015-01-22 22:34:32 +00:00
serial	…
sh	…
sound	…
spi	Merge remote-tracking branches 'spi/topic/spidev' and 'spi/topic/spidev-test' into spi-next	2015-04-11 23:09:31 +01:00
sysctl	mm: allow compaction of unevictable pages	2015-04-15 16:35:17 -07:00
target	Documentation/target: Update fabric_ops to latest code	2015-01-06 13:46:49 -08:00
thermal	Documentation: thermal: document of_cpufreq_cooling_register()	2015-01-06 14:39:17 -04:00
timers	documentation: Update NO_HZ_FULL interaction with POSIX timers	2015-02-26 11:57:29 -08:00
tpm	…
trace	Char / Misc patches for 3.20-rc1	2015-02-15 10:48:44 -08:00
usb	usb: patches for v4.1 merge window	2015-03-24 22:57:49 +01:00
vDSO	…
video4linux	MODULE_DEVICE_TABLE: fix some callsites	2015-02-13 21:21:40 -08:00
virtual	Features and fixes for 4.1 (kvm/next)	2015-04-07 18:10:03 +02:00
vm	mm, doc: cleanup and clarify munmap behavior for hugetlb memory	2015-04-15 16:35:19 -07:00
w1	…
watchdog	…
wimax	…
x86	x86/mm/KASLR: Propagate KASLR status to kernel proper	2015-04-03 15:26:15 +02:00
xtensa	…
zh_CN	…
00-INDEX	Update of Documentation/dmaengine/00-INDEX	2014-12-29 15:28:24 -07:00
BUG-HUNTING	…
Changes	Documentation: GNU is frequently spelled Gnu	2014-12-29 15:33:17 -07:00
CodeOfConflict	Code of Conflict	2015-02-27 11:44:24 -08:00
CodingStyle	CodingStyle: enable emacs display of trailing whitespace	2015-01-28 12:05:46 -07:00
DMA-API-HOWTO.txt	…
DMA-API.txt	…
DMA-ISA-LPC.txt	…
DMA-attributes.txt	…
HOWTO	…
IPMI.txt	…
IRQ-affinity.txt	…
IRQ-domain.txt	…
IRQ.txt	…
Intel-IOMMU.txt	…
Makefile	…
ManagementStyle	…
SAK.txt	…
SM501.txt	…
SecurityBugs	…
SubmitChecklist	…
SubmittingDrivers	…
SubmittingPatches	Merge branch 'doc/sp-update' into docs-next	2015-01-29 13:11:58 -07:00
VGA-softcursor.txt	…
applying-patches.txt	…
assoc_array.txt	…
atomic_ops.txt	documentation: Clarify memory-barrier semantics of atomic operations	2015-02-26 11:57:31 -08:00
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	rmap: drop support of non-linear mappings	2015-02-10 14:30:31 -08:00
circular-buffers.txt	…
clk.txt	clk: Add rate constraints to clocks	2015-02-02 14:23:42 -08:00
coccinelle.txt	…
cpu-hotplug.txt	…
cpu-load.txt	…
cputopology.txt	…
crc32.txt	…
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	…
dell_rbu.txt	…
devices.txt	…
digsig.txt	…
dma-buf-sharing.txt	…
dontdiff	…
dynamic-debug-howto.txt	…
edac.txt	…
efi-stub.txt	…
eisa.txt	…
email-clients.txt	…
flexible-arrays.txt	…
futex-requeue-pi.txt	doc: Fix misnamed FUTEX_CMP_REQUEUE_PI op constants	2015-01-19 12:05:32 +01:00
gcov.txt	…
gdb-kernel-debugging.txt	scripts/gdb: add basic documentation	2015-02-17 14:34:54 -08:00
highuid.txt	…
hsi.txt	…
hw_random.txt	…
hwspinlock.txt	…
init.txt	…
initrd.txt	…
intel_txt.txt	…
io-mapping.txt	…
io_ordering.txt	…
iostats.txt	…
irqflags-tracing.txt	…
isapnp.txt	…
java.txt	…
kasan.txt	kasan: enable instrumentation of global variables	2015-02-13 21:21:42 -08:00
kernel-doc-nano-HOWTO.txt	…
kernel-docs.txt	…
kernel-parameters.txt	Power management and ACPI updates for v4.1-rc1	2015-04-14 20:21:54 -07:00
kernel-per-CPU-kthreads.txt	documentation: Update per-CPU kthreads documentation	2015-02-26 11:57:30 -08:00
kmemcheck.txt	…
kmemleak.txt	…
kobject.txt	…
kprobes.txt	Documentation: add description for FTRACE probe status	2015-02-04 16:05:44 -05:00
kref.txt	…
kselftest.txt	…
ldm.txt	…
local_ops.txt	…
lockup-watchdogs.txt	…
logo.gif	…
logo.txt	…
lzo.txt	…
magic-number.txt	…
mailbox.txt	…
md.txt	…
media-framework.txt	…
memory-barriers.txt	documentation: Clarify control-dependency pairing	2015-02-26 11:57:32 -08:00
memory-hotplug.txt	…
module-signing.txt	…
mono.txt	…
nommu-mmap.txt	fs: introduce f_op->mmap_capabilities for nommu mmap support	2015-01-20 14:02:58 -07:00
numastat.txt	…
oops-tracing.txt	livepatch: kernel: add TAINT_LIVEPATCH	2014-12-22 15:40:48 +01:00
padata.txt	…
parport-lowlevel.txt	…
parport.txt	…
percpu-rw-semaphore.txt	…
phy.txt	…
pi-futex.txt	…
pinctrl.txt	pinctrl: fix example .get_group_pins implementation signature	2015-03-18 02:02:20 +01:00
pnp.txt	…
preempt-locking.txt	…
printk-formats.txt	…
pwm.txt	…
ramoops.txt	…
rbtree.txt	…
remoteproc.txt	…
rfkill.txt	rfkill: document rfkill module parameters	2015-01-09 23:22:12 +01:00
robust-futex-ABI.txt	…
robust-futexes.txt	…
rpmsg.txt	…
rtc.txt	Documentation, split up rtc.txt into documentation and test file	2015-03-24 22:01:58 -06:00
serial-console.txt	…
sgi-ioc4.txt	…
smsc_ece1099.txt	…
sparse.txt	…
stable_api_nonsense.txt	…
stable_kernel_rules.txt	stable_kernel_rules: Add clause about specification of kernel versions to patch.	2015-03-26 23:52:24 +01:00
static-keys.txt	…
svga.txt	…
sysfs-rules.txt	…
sysrq.txt	…
this_cpu_ops.txt	…
unaligned-memory-access.txt	…
unicode.txt	…
unshare.txt	…
vfio.txt	…
vgaarbiter.txt	…
video-output.txt	…
vme_api.txt	…
volatile-considered-harmful.txt	…
workqueue.txt	…
xillybus.txt	…
xz.txt	…
zorro.txt	…