linux/drivers/staging/zcache, branch v3.9

staging: zcache: fix typo "64_BIT"

2013-03-18T23:04:03Z

Signed-off-by: Paul Bolle Signed-off-by: Greg Kroah-Hartman

zcache: convert to idr_alloc()

2013-03-13T22:21:46Z

idr_get_new*() and friends are about to be deprecated. Convert to the new idr_alloc() interface. Only compile tested. Signed-off-by: Tejun Heo Cc: Dan Magenheimer Acked-by: Greg Kroah-Hartman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: rename page struct field helpers

2013-02-24T01:50:18Z

The function names page_xchg_last_nid(), page_last_nid() and reset_page_last_nid() were judged to be inconsistent so rename them to a struct_field_op style pattern. As it looked jarring to have reset_page_mapcount() and page_nid_reset_last() beside each other in memmap_init_zone(), this patch also renames reset_page_mapcount() to page_mapcount_reset(). There are others like init_page_count() but as it is used throughout the arch code a rename would likely cause more conflicts than it is worth. [akpm@linux-foundation.org: fix zcache] Signed-off-by: Mel Gorman Suggested-by: Andrew Morton Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

staging/zache checkpatch ERROR: spaces prohibited around that

2013-02-18T18:43:14Z

zbud.c:106: ERROR: spaces prohibited around that ':' (ctx:VxW) zbud.c:107: ERROR: spaces prohibited around that ':' (ctx:VxW) Signed-off-by: Robert Berger Signed-off-by: Greg Kroah-Hartman

zcache/zbud: Fix __init mismatch

2013-02-15T18:16:11Z

We get: WARNING: drivers/staging/zcache/zcache.o(.text+0x13a1): Section mismatch in reference from the function zcache_init() to the function .init.text:zbud_init() The function zcache_init() references the function __init zbud_init(). This is often because zcache_init lacks a __init annotation or the annotation of zbud_init is wrong. And this fixes it. Acked-by: Dan Magenheimer Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Greg Kroah-Hartman

zbud: Fix compile warnings due to usage of debugfs_create_size_t

2013-02-15T18:16:11Z

. drivers/staging/zcache/zbud.c:336: warning: passing argument 4 of ‘debugfs_create_size_t’ from incompatible pointer type include/linux/debugfs.h:80: note: expected ‘size_t *’ but argument is of type ‘long unsigned int *’ .. which is b/c we end up using 'unsigned' or 'unsigned long' instead of 'ssize_t'. So lets fix this up and use the proper type. Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Greg Kroah-Hartman

ramster: Fix compile warnings due to usage of debugfs_create_size_t

2013-02-15T18:16:11Z

We get tons of "note: expected ‘size_t *’ but argument is of type ‘long int *’" warnings. This fixes it. Acked-by: Dan Magenheimer Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Greg Kroah-Hartman

zcache: Fix compile warnings due to usage of debugfs_create_size_t

2013-02-15T18:16:10Z

When we compile we get tons of: include/linux/debugfs.h:80:16: note: expected ‘size_t *’ but argument is of type ‘long int *’ drivers/staging/zcache/zcache-main.c:279:2: warning: passing argument 4 of ‘debugfs_create_size_t’ from incompatible pointer type [enabled by d efault] which is b/c we end up using 'unsigned' or 'unsigned long' instead of 'ssize_t'. So lets fix this up and use the proper type. [v2: Rebased directly on staging] Acked-by: Dan Magenheimer Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Greg Kroah-Hartman

staging: zcache: add TODO file

2013-02-13T18:22:12Z

Add zcache TODO file Signed-off-by: Dan Magenheimer Signed-off-by: Greg Kroah-Hartman

staging/zcache: Fix/improve zcache writeback code, tie to a config option

2013-02-11T22:58:56Z

It was observed by Andrea Arcangeli in 2011 that zcache can get "full" and there must be some way for compressed swap pages to be (uncompressed and then) sent through to the backing swap disk. A prototype of this functionality, called "unuse", was added in 2012 as part of a major update to zcache (aka "zcache2"), but was left unfinished due to the unfortunate temporary fork of zcache. This earlier version of the code had an unresolved memory leak and was anyway dependent on not-yet-upstream frontswap and mm changes. The code was meanwhile adapted by Seth Jennings for similar functionality in zswap (which he calls "flush"). Seth also made some clever simplifications which are herein ported back to zcache. As a result of those simplifications, the frontswap changes are no longer necessary, but a slightly different (and simpler) set of mm changes are still required [1]. The memory leak is also fixed. Due to feedback from akpm in a zswap thread, this functionality in zcache has now been renamed from "unuse" to "writeback". Although this zcache writeback code now works, there are open questions as how best to handle the policy that drives it. As a result, this patch also ties writeback to a new config option. And, since the code still depends on not-yet-upstreamed mm patches, to avoid build problems, the config option added by this patch temporarily depends on "BROKEN"; this config dependency can be removed in trees that contain the necessary mm patches. [1] https://lkml.org/lkml/2013/1/29/540/ https://lkml.org/lkml/2013/1/29/539/ Signed-off-by: Dan Magenheimer Signed-off-by: Greg Kroah-Hartman