linux.git/drivers/staging/zcache, branch v3.10-rc2

staging: zcache: enable zcache to be built/loaded as a module

2013-05-01T00:04:01+00:00

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 
[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 
Signed-off-by: Bob Liu 
Cc: Wanpeng Li 
Cc: Andor Daam 
Cc: Florian Schmaus 
Cc: Minchan Kim 
Cc: Stefan Hengelein 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

staging: zcache: enable ramster to be built/loaded as a module

2013-05-01T00:04:01+00:00

Enable module support for ramster.  Note runtime dependency disallows
loading if cleancache/frontswap lazy initialization patches are not
present.

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.

[v1: Fixed compile issues since ramster_init now has four arguments]
[v2: Fixed rebase on ramster->zcache move]
[akpm@linux-foundation.org: use_frontswap_selfshrink cannot be __initdata]
Signed-off-by: Dan Magenheimer 
Signed-off-by: Konrad Rzeszutek Wilk 
Signed-off-by: Bob Liu 
Cc: Wanpeng Li 
Cc: Andor Daam 
Cc: Florian Schmaus 
Cc: Minchan Kim 
Cc: Stefan Hengelein 
Cc: Wu Fengguang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

zcache/tmem: Better error checking on frontswap_register_ops return value.

2013-05-01T00:04:01+00:00

In the past it either used to be NULL or the "older" backend. Now we
also return -Exx error codes.

Signed-off-by: Konrad Rzeszutek Wilk 
Signed-off-by: Bob Liu 
Cc: Wanpeng Li 
Cc: Andor Daam 
Cc: Dan Magenheimer 
Cc: Florian Schmaus 
Cc: Minchan Kim 
Cc: Stefan Hengelein 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cleancache: Make cleancache_init use a pointer for the ops

2013-05-01T00:04:01+00:00

Instead of using a backend_registered to determine whether a backend is
enabled.  This allows us to remove the backend_register check and just
do 'if (cleancache_ops)'

[v1: Rebase on top of b97c4b430b0a (ramster->zcache move]
Signed-off-by: Konrad Rzeszutek Wilk 
Signed-off-by: Bob Liu 
Cc: Wanpeng Li 
Cc: Andor Daam 
Cc: Dan Magenheimer 
Cc: Florian Schmaus 
Cc: Minchan Kim 
Cc: Stefan Hengelein 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

frontswap: make frontswap_init use a pointer for the ops

2013-05-01T00:04:00+00:00

This simplifies the code in the frontswap - we can get rid of the
'backend_registered' test and instead check against frontswap_ops.

[v1: Rebase on top of 703ba7fe5e0 (ramster->zcache move]
Signed-off-by: Konrad Rzeszutek Wilk 
Signed-off-by: Bob Liu 
Cc: Wanpeng Li 
Cc: Andor Daam 
Cc: Dan Magenheimer 
Cc: Florian Schmaus 
Cc: Minchan Kim 
Cc: Stefan Hengelein 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

staging: zcache/debug: fix coding style

2013-04-13T13:29:00+00:00

Fix coding style issue: ERROR: space prohibited before that '++' (ctx:WxO)
and line beyond 8 characters.

Acked-by: Dan Magenheimer 
Signed-off-by: Wanpeng Li 
Signed-off-by: Greg Kroah-Hartman

staging: ramster/debug: Add CONFIG_RAMSTER_DEBUG Kconfig entry

2013-04-13T13:27:09+00:00

Add CONFIG_RAMSTER_DEBUG Kconfig entry.

Acked-by: Dan Magenheimer 
Signed-off-by: Wanpeng Li 
Signed-off-by: Greg Kroah-Hartman

staging: ramster: Add incremental accessory counters

2013-04-13T13:25:01+00:00

Add incremental accessory counters that are going to be used for
debug fs entries.

Acked-by: Dan Magenheimer 
Signed-off-by: Wanpeng Li 
Signed-off-by: Greg Kroah-Hartman

staging: ramster/debug: Use an array to initialize/use debugfs attributes

2013-04-13T13:24:47+00:00

Use an array to initialize/use debugfs attributes, it makes them
neater as zcache/debug.c does.

Acked-by: Dan Magenheimer 
Signed-off-by: Wanpeng Li 
Signed-off-by: Greg Kroah-Hartman

staging: ramster: Move debugfs code out of ramster.c file

2013-04-13T13:23:33+00:00

Note that at this point there is no CONFIG_RAMSTER_DEBUG
option in the Kconfig. So in effect all of the counters
are nop until that option gets introduced in patch:
ramster/debug: Add CONFIG_RAMSTER_DEBUG Kconfig entry

Acked-by: Dan Magenheimer 
Signed-off-by: Wanpeng Li 
Signed-off-by: Greg Kroah-Hartman