linux/drivers/staging/zcache, branch v3.4

staging: zcache: fix Kconfig crypto dependency

2012-04-24T18:57:36Z

ZCACHE is a boolean in the Kconfig. When selected, it should require that CRYPTO be builtin (=y). Currently, ZCACHE=y and CRYPTO=m is a valid configuration when it should not be. This patch changes the zcache Kconfig to enforce this dependency. Signed-off-by: Seth Jennings Acked-by: Konrad Rzeszutek Wilk Signed-off-by: Greg Kroah-Hartman

Merge tag 'stable/for-linus-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm

2012-03-23T02:52:47Z

Pull cleancache changes from Konrad Rzeszutek Wilk: "This has some patches for the cleancache API that should have been submitted a _long_ time ago. They are basically cleanups: - rename of flush to invalidate - moving reporting of statistics into debugfs - use __read_mostly as necessary. Oh, and also the MAINTAINERS file change. The files (except the MAINTAINERS file) have been in #linux-next for months now. The late addition of MAINTAINERS file is a brain-fart on my side - didn't realize I needed that just until I was typing this up - and I based that patch on v3.3 - so the tree is on top of v3.3." * tag 'stable/for-linus-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm: MAINTAINERS: Adding cleancache API to the list. mm: cleancache: Use __read_mostly as appropiate. mm: cleancache: report statistics via debugfs instead of sysfs. mm: zcache/tmem/cleancache: s/flush/invalidate/ mm: cleancache: s/flush/invalidate/

Merge branch 'kmap_atomic' of git://github.com/congwang/linux

2012-03-21T16:40:26Z

Pull kmap_atomic cleanup from Cong Wang. It's been in -next for a long time, and it gets rid of the (no longer used) second argument to k[un]map_atomic(). Fix up a few trivial conflicts in various drivers, and do an "evil merge" to catch some new uses that have come in since Cong's tree. * 'kmap_atomic' of git://github.com/congwang/linux: (59 commits) feature-removal-schedule.txt: schedule the deprecated form of kmap_atomic() for removal highmem: kill all __kmap_atomic() [swarren@nvidia.com: highmem: Fix ARM build break due to __kmap_atomic rename] drbd: remove the second argument of k[un]map_atomic() zcache: remove the second argument of k[un]map_atomic() gma500: remove the second argument of k[un]map_atomic() dm: remove the second argument of k[un]map_atomic() tomoyo: remove the second argument of k[un]map_atomic() sunrpc: remove the second argument of k[un]map_atomic() rds: remove the second argument of k[un]map_atomic() net: remove the second argument of k[un]map_atomic() mm: remove the second argument of k[un]map_atomic() lib: remove the second argument of k[un]map_atomic() power: remove the second argument of k[un]map_atomic() kdb: remove the second argument of k[un]map_atomic() udf: remove the second argument of k[un]map_atomic() ubifs: remove the second argument of k[un]map_atomic() squashfs: remove the second argument of k[un]map_atomic() reiserfs: remove the second argument of k[un]map_atomic() ocfs2: remove the second argument of k[un]map_atomic() ntfs: remove the second argument of k[un]map_atomic() ...

zcache: remove the second argument of k[un]map_atomic()

2012-03-20T13:48:29Z

Acked-by: Greg Kroah-Hartman Signed-off-by: Cong Wang

Merge branch 'stable/cleancache.v13' into linux-next

2012-03-19T16:12:19Z

* stable/cleancache.v13: mm: cleancache: Use __read_mostly as appropiate. mm: cleancache: report statistics via debugfs instead of sysfs. mm: zcache/tmem/cleancache: s/flush/invalidate/ mm: cleancache: s/flush/invalidate/

staging/zmem: Use lockdep_assert_held instead of spin_is_locked

2012-03-16T21:47:41Z

WARN_ON(!spin_is_locked()) will always trigger on UP. Use lockdep_assert_held instead. Signed-off-by: Andi Kleen Signed-off-by: Greg Kroah-Hartman

staging: zcache: make zcache builtin only

2012-03-07T21:30:17Z

zcache cannot currently be loaded as a module. However the Kconfig allows it to be built as a module; something that the user probably does not intend since the module is not loadable. This patch switches zcache from a tristate to a bool in the Kconfig Signed-off-by: Seth Jennings Acked-by: Dan Magenheimer Signed-off-by: Greg Kroah-Hartman

staging: zcache: fix memory corruption bug

2012-02-29T23:23:38Z

This patch fixes a bug where the zv code writes before the allocated buffer, resulting in system memory corruption. This was introduced during the switch from xvmalloc to zsmalloc. Signed-off-by: Seth Jennings Signed-off-by: Greg Kroah-Hartman

staging: zcache: fix length type mismatch

2012-02-29T23:23:37Z

This fixes a type mismatch in the compression code where a size_t pointer was cast to a unsigned int pointer. On little endian archs, there is no issue. However on big endian archs, the value is incorrect, taking the high order bits and truncating the lower order bits. Signed-off-by: Seth Jennings Signed-off-by: Greg Kroah-Hartman

staging: zcache: avoid AB-BA deadlock condition

2012-02-24T19:59:59Z

Commit 9256a47 fixed a deadlock condition, being sure that the buddy list spinlock is always taken before the page spinlock. However in zbud_free_and_delist() locking order is the opposite (page lock -> list lock). Possible unsafe locking scenario (reported by lockdep): CPU0 CPU1 ---- ---- lock(&(&zbpg->lock)->rlock); lock(zbud_budlists_spinlock); lock(&(&zbpg->lock)->rlock); lock(zbud_budlists_spinlock); Fix by grabbing the locks in opposite order in zbud_free_and_delist(). Signed-off-by: Andrea Righi Cc: stable Signed-off-by: Greg Kroah-Hartman