linux/drivers/staging/zcache, branch v3.1

staging: zcache: fix cleancache crash

2011-09-20T21:17:13Z

After commit c5f5c4db3938 ("staging: zcache: fix crash on high memory swap") cleancache crashes on the first successful get. This was caused by a remaining virt_to_page() call in zcache_pampd_get_data_and_free() that only gets run in the cleancache path. The patch converts the virt_to_page() to struct page casting like was done for other instances in c5f5c4db3938. Signed-off-by: Seth Jennings Tested-By: Valdis Kletnieks Acked-by: Dan Magenheimer Signed-off-by: Greg Kroah-Hartman Signed-off-by: Linus Torvalds

Staging: zcache: signedness bug in tmem_get()

2011-08-23T21:52:20Z

"ret" needs to be signed for the error handling to work properly. Signed-off-by: Dan Carpenter Acked-by: Dan Magenheimer Signed-off-by: Greg Kroah-Hartman

staging: zcache: fix crash on high memory swap

2011-08-23T21:52:20Z

zcache_put_page() was modified to pass page_address(page) instead of the actual page structure. In combination with the function signature changes to tmem_put() and zcache_pampd_create(), zcache_pampd_create() tries to (re)derive the page structure from the virtual address. However, if the original page is a high memory page (or any unmapped page), this virt_to_page() fails because the page_address() in zcache_put_page() returned NULL. This patch changes zcache_put_page() and zcache_get_page() to pass the page structure instead of the page's virtual address, which may or may not exist. Signed-off-by: Seth Jennings Acked-by: Dan Magenheimer Signed-off-by: Greg Kroah-Hartman

zcache: Fix build error when sysfs is not defined

2011-08-08T19:05:35Z

Signed-off-by: Nitin Gupta Signed-off-by: Greg Kroah-Hartman

zcache: Use div_u64 for 64-bit division

2011-08-08T19:05:34Z

xv_get_total_size_bytes returns a u64 value and it's used in a division. This causes build failures in 32-bit architectures, as reported by Randy Dunlap. Reported-by: Randy Dunlap Signed-off-by: Thadeu Lima de Souza Cascardo Cc: Stephen Rothwell Cc: Dan Magenheimer Cc: Nitin Gupta Acked-by: Randy Dunlap Signed-off-by: Greg Kroah-Hartman

staging: zcache: include module.h for MODULE_LICENSE

2011-08-03T14:25:49Z

The oncoming cleanup of module.h usage requires the explicit inclusion of module.h when it was otherwise being included indirectly. Otherwise, building zcache will fail. Reported-by: Stephen Rothwell Signed-off-by: Thadeu Lima de Souza Cascardo Signed-off-by: Greg Kroah-Hartman

staging: zcache: module is GPL

2011-08-02T23:06:18Z

This avoids tainting the kernel as if a proprietary module was loaded. The kernel will still be tainted because this is a staging driver. Signed-off-by: Thadeu Lima de Souza Cascardo Signed-off-by: Greg Kroah-Hartman

staging: fix zcache building

2011-08-02T23:06:18Z

zcache is only building tmem.c and not building zcache.c. To keep the module name, zcache.c must be renamed if symbols from tmem.c are to remain unexported. Signed-off-by: Thadeu Lima de Souza Cascardo Acked-by: Dan Magenheimer Signed-off-by: Greg Kroah-Hartman

staging: zcache: support multiple clients, prep for KVM and RAMster

2011-07-08T21:18:53Z

This is version 3 of an update to zcache, incorporating feedback from the list. This patch adds support to the in-kernel transcendent memory ("tmem") code and the zcache driver for multiple clients, which will be needed for both RAMster and KVM support. It also adds additional tmem callbacks to support RAMster and corresponding no-op stubs in the zcache driver. In v2, I've also taken the liberty of adding some additional sysfs variables to both surface information and allow policy control. Those experimenting with zcache should find them useful. V3 clarifies some code walking and declaring arrays. Signed-off-by: Dan Magenheimer [v3: error27@gmail.com: fix array bounds/walking] [v2: konrad.wilk@oracle.com: fix bools, add check for NULL, fix a comment] [v2: sjenning@linux.vnet.ibm.com: add info/tunables for poor compression] [v2: marcusklemm@googlemail.com: add tunable for max persistent pages] Acked-by: Dan Carpenter Cc: Nitin Gupta Cc: linux-mm@kvack.org Cc: kvm@vger.kernel.org Signed-off-by: Greg Kroah-Hartman

vmscan: change shrinker API by passing shrink_control struct

2011-05-25T15:39:26Z

Change each shrinker's API by consolidating the existing parameters into shrink_control struct. This will simplify any further features added w/o touching each file of shrinker. [akpm@linux-foundation.org: fix build] [akpm@linux-foundation.org: fix warning] [kosaki.motohiro@jp.fujitsu.com: fix up new shrinker API] [akpm@linux-foundation.org: fix xfs warning] [akpm@linux-foundation.org: update gfs2] Signed-off-by: Ying Han Cc: KOSAKI Motohiro Cc: Minchan Kim Acked-by: Pavel Emelyanov Cc: KAMEZAWA Hiroyuki Cc: Mel Gorman Acked-by: Rik van Riel Cc: Johannes Weiner Cc: Hugh Dickins Cc: Dave Hansen Cc: Steven Whitehouse Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds