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Dan Magenheimer 835f2f5160 staging: zcache: enable zcache to be built/loaded as a module 
Allow zcache to be built/loaded as a module.  Note runtime dependency
disallows loading if cleancache/frontswap lazy initialization patches
are not present.  Zsmalloc support has not yet been merged into zcache
but, once merged, could now easily be selected via a module_param.

If built-in (not built as a module), the original mechanism of enabling
via a kernel boot parameter is retained, but this should be considered
deprecated.

Note that module unload is explicitly not yet supported.

Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
[v1: Rebased with different order of patches]
[v2: Removed [CLEANCACHE|FRONTSWAP]_HAS_LAZY_INIT ifdef]
[v3: Rebased on top of ramster->zcache move]
[v4: Redid the Makefile]
[v5: s/ZCACHE2/ZCACHE/]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Andor Daam <andor.daam@googlemail.com>
Cc: Florian Schmaus <fschmaus@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Stefan Hengelein <ilendir@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2013-04-30 17:04:01 -07:00
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accessibility
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acpi PCI changes for the v3.10 merge window: 2013-04-29 09:30:25 -07:00
amba
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ata Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
atm
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auxdisplay
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base Merge branch 'for-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq 2013-04-29 19:07:40 -07:00
bcma
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block drbd: rename random32() to prandom_u32() 2013-04-29 18:28:42 -07:00
bluetooth
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bus
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cdrom
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char Char / Misc driver update for 3.10-rc1 2013-04-29 11:18:34 -07:00
clk Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
clocksource Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-04-30 08:15:40 -07:00
connector
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cpufreq cpufreq / intel_pstate: Set timer timeout correctly 2013-04-08 22:09:23 +02:00
cpuidle
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crypto Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
dca
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devfreq
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dio
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dma dmaengine: at_hdmac: fix race condition in atc_advance_work() 2013-04-18 08:54:22 -07:00
edac Merge branch 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac 2013-04-30 10:00:49 -07:00
eisa PCI changes for the v3.10 merge window: 2013-04-29 09:30:25 -07:00
extcon This is small fixes for extcon driver. 2013-04-08 16:50:23 -07:00
firewire
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firmware firmware, memmap: fix firmware_map_entry leak 2013-04-29 15:54:38 -07:00
gpio These are the pinctrl changes for v3.10: 2013-04-29 09:40:35 -07:00
gpu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2013-04-30 09:37:55 -07:00
hsi
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hv Merge branch 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-04-30 08:41:21 -07:00
hwmon Staging driver tree update for 3.10-rc1 2013-04-29 11:34:17 -07:00
hwspinlock hwspinlock: fix __hwspin_lock_request error path 2013-04-05 17:45:11 +03:00
i2c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
ide
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idle
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iio
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infiniband drivers/infiniband/hw/mlx4: convert to using idr_alloc_cyclic() 2013-04-29 18:28:41 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2013-04-19 09:15:13 -07:00
iommu Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-04-30 08:40:35 -07:00
ipack
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irqchip Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
isdn Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
leds
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lguest lguest: rename random32() to prandom_u32() 2013-04-29 18:28:43 -07:00
macintosh
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mailbox
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md Revert "block: add missing block_bio_complete() tracepoint" 2013-04-18 09:00:26 -07:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2013-04-30 09:58:16 -07:00
memory
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memstick
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message
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mfd regulator: Updates for v3.10 2013-04-29 16:32:25 -07:00
misc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
mmc mmc: rename random32() to prandom_u32() 2013-04-29 18:28:42 -07:00
mtd mtdchar: remove no-longer-used vma helpers 2013-04-19 10:05:39 -07:00
net Main features: 2013-04-30 10:10:48 -07:00
nfc
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ntb
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nubus
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of [media] DT: export of_get_next_parent() for use by modules: fix modular V4L2 2013-04-17 12:28:57 -03:00
oprofile
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parisc
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parport
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pci PCI changes for the v3.10 merge window: 2013-04-29 09:30:25 -07:00
pcmcia
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pinctrl pinctrl: move subsystem mutex to pinctrl_dev struct 2013-04-26 17:01:35 +02:00
platform Merge branch 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86 2013-04-18 15:14:34 -07:00
pnp
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power Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
pps
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ps3
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ptp
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pwm
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rapidio
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regulator Merge remote-tracking branch 'regulator/topic/wm8994' into v3.9-rc8 2013-04-28 02:13:50 +01:00
remoteproc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
rpmsg drivers/rpmsg/virtio_rpmsg_bus.c: fix error return code in rpmsg_probe() 2013-04-29 18:28:13 -07:00
rtc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
s390 TTY/Serial driver update for 3.10-rc1 2013-04-29 12:16:17 -07:00
sbus
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scsi Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
sfi
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sh
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sn
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spi spi: Updates for v3.10 2013-04-29 16:38:41 -07:00
ssb ssb: implement spurious tone avoidance 2013-04-10 10:31:26 -04:00
ssbi
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staging staging: zcache: enable zcache to be built/loaded as a module 2013-04-30 17:04:01 -07:00
target target: Fix incorrect fallthrough of ALUA Standby/Offline/Transition CDBs 2013-04-11 01:48:49 -07:00
tc
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thermal
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tty TTY/Serial driver update for 3.10-rc1 2013-04-29 12:16:17 -07:00
uio
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usb drivers/usb/storage/realtek_cr.c: fix build 2013-04-30 17:04:00 -07:00
uwb uwb: rename random32() to prandom_u32() 2013-04-29 18:28:43 -07:00
vfio PCI changes for the v3.10 merge window: 2013-04-29 09:30:25 -07:00
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2013-04-12 15:26:42 -07:00
video Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-04-30 09:36:50 -07:00
virt
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virtio
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vlynq
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vme
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w1
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watchdog watchdog: Revert the AT91RM9200_WATCHDOG dependency 2013-04-14 09:09:10 +02:00
xen zcache/tmem: Better error checking on frontswap_register_ops return value. 2013-04-30 17:04:01 -07:00
zorro
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Kconfig
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Makefile USB patches for 3.10-rc1 2013-04-29 12:19:23 -07:00