linux.git/drivers/staging/android/Kconfig, branch v5.10

staging: android: Delete the 'vsoc' driver

2020-02-10T16:51:12+00:00

The 'vsoc' driver was required for an early iteration of the Android
'cuttlefish' virtual platform, but this platform has been wholly
converted to use virtio drivers instead. Delete this old driver.

Cc: Greg Kroah-Hartman 
Cc: Joel Fernandes 
Cc: Greg Hartman 
Cc: kernel-team@android.com
Cc: devel@driverdev.osuosl.org
Signed-off-by: Alistair Delva 
Reviewed-by: Joel Fernandes (Google) 
Link: https://lore.kernel.org/r/20200203042254.80360-1-adelva@google.com
Signed-off-by: Greg Kroah-Hartman

staging: remove redundant 'default n' from Kconfig

2019-04-16T11:39:01+00:00

'default n' is the default value for any bool or tristate Kconfig
setting so there is no need to write it explicitly.

Also since commit f467c5640c29 ("kconfig: only write '# CONFIG_FOO
is not set' for visible symbols") the Kconfig behavior is the same
regardless of 'default n' being present or not:

    ...
    One side effect of (and the main motivation for) this change is making
    the following two definitions behave exactly the same:

        config FOO
                bool

        config FOO
                bool
                default n

    With this change, neither of these will generate a
    '# CONFIG_FOO is not set' line (assuming FOO isn't selected/implied).
    That might make it clearer to people that a bare 'default n' is
    redundant.
    ...

Signed-off-by: Bartlomiej Zolnierkiewicz 
Signed-off-by: Greg Kroah-Hartman

staging: add missing SPDX lines to Kconfig files

2019-04-03T09:10:15+00:00

There are a few remaining drivers/staging/*/Kconfig files that do not
have SPDX identifiers in them.  Add the correct GPL-2.0 identifier to
them to make scanning tools happy.

Signed-off-by: Greg Kroah-Hartman

staging: android: Kconfig; Remove excessive hyphens

2018-05-08T11:24:15+00:00

Fixes the following checkpatch.pl warning:
"prefer 'help' over '---help---' for new help texts"

Signed-off-by: Nathan Chancellor 
Signed-off-by: Greg Kroah-Hartman

staging: Android: Add 'vsoc' driver for cuttlefish.

2018-04-23T12:51:37+00:00

The cuttlefish system is a virtual SoC architecture based on QEMU. It
uses the QEMU ivshmem feature to share memory regions between guest and
host with a custom protocol.

Cc: Greg Kroah-Hartman 
Cc: Arve Hjønnevåg 
Cc: Todd Kjos 
Cc: Martijn Coenen 
Cc: Dan Carpenter 
Cc: devel@driverdev.osuosl.org
Cc: kernel-team@android.com
Signed-off-by: Greg Hartman 
[astrachan: rebased against 4.16, added TODO, fixed checkpatch issues]
Signed-off-by: Alistair Strachan 
Signed-off-by: Greg Kroah-Hartman

staging, android: remove lowmemory killer from the tree

2017-03-09T12:47:03+00:00

Lowmemory killer is sitting in the staging tree since 2008 without any
serious interest for fixing issues brought up by the MM folks. The main
objection is that the implementation is basically broken by design:
	- it hooks into slab shrinker API which is not suitable for this
	  purpose. lowmem_count implementation just shows this nicely.
	  There is no scaling based on the memory pressure and no
	  feedback to the generic shrinker infrastructure.
	  Moreover lowmem_scan is called way too often for the heavy
	  work it performs.
	- it is not reclaim context aware - no NUMA and/or memcg
	  awareness.

As the code stands right now it just adds a maintenance overhead when
core MM changes have to update lowmemorykiller.c as well. It also seems
that the alternative LMK implementation will be solely in the userspace
so this code has no perspective it seems. The staging tree is supposed
to be for a code which needs to be put in shape before it can be merged
which is not the case here obviously.

Signed-off-by: Michal Hocko 
Signed-off-by: Greg Kroah-Hartman

dma-buf/sw_sync: de-stage SW_SYNC

2016-08-15T14:41:46+00:00

SW_SYNC allows to run tests on the sync_file framework via debugfs on

/sync/sw_sync

Opening and closing the file triggers creation and release of a sync
timeline. To create fences on this timeline the SW_SYNC_IOC_CREATE_FENCE
ioctl should be used. To increment the timeline value use SW_SYNC_IOC_INC.

Also it exports Sync information on

/sync/info

Signed-off-by: Gustavo Padovan 
Reviewed-by: Eric Engestrom 
Signed-off-by: Greg Kroah-Hartman

staging/android: add DEBUG_FS dependence on Kconfig

2016-06-18T04:17:40+00:00

SW_SYNC only works with DEBUG_FS so state it in the Kconfig file.

Signed-off-by: Gustavo Padovan 
Reviewed-by: Daniel Vetter 
Reviewed-by: Sumit Semwal 
Signed-off-by: Greg Kroah-Hartman

staging/android: make sync_timeline internal to sw_sync

2016-06-18T04:17:40+00:00

The only use sync_timeline will have in upstream kernel is for debugging
through the SW_SYNC interface. So make it internal to SW_SYNC to avoid
people use it in the future.

Signed-off-by: Gustavo Padovan 
Reviewed-by: Daniel Vetter 
Reviewed-by: Sumit Semwal 
Signed-off-by: Greg Kroah-Hartman

dma-buf/sync_file: de-stage sync_file

2016-04-30T00:37:10+00:00

sync_file is useful to connect one or more fences to the file. The file is
used by userspace to track fences between drivers that share DMA bufs.

Signed-off-by: Gustavo Padovan 
Reviewed-by: Daniel Vetter 
Signed-off-by: Greg Kroah-Hartman