linux-stable.git/drivers/staging/android/ion, branch v3.15.2

staging: android: ion: Use ERR_CAST instead of ERR_PTR

2014-03-13T23:34:02+00:00

Fix the following coccinelle warnings in ion.c:
drivers/staging/android/ion/ion.c:511:9-16: WARNING: ERR_CAST can be used with buffer
drivers/staging/android/ion/ion.c:218:9-16: WARNING: ERR_CAST can be used with table
drivers/staging/android/ion/ion.c:1150:9-16: WARNING: ERR_CAST can be used with dmabuf

Signed-off-by: Iulia Manda 
Acked-by: Paul E. McKenney 
Signed-off-by: Peter P Waskiewicz Jr

staging: android: ion: Replace seq_printf with seq_puts

2014-03-13T23:33:54+00:00

It is preferred to use seq_puts instead of seq_printf here, as it suffices string printing.

Signed-off-by: Iulia Manda 
Acked-by: Paul E. McKenney 
Signed-off-by: Peter P Waskiewicz Jr

staging: android: ion: Fix quoted string split across lines

2014-03-13T23:33:43+00:00

Join strings from two separated lines, even if this makes line longer than 80
characters.

Signed-off-by: Iulia Manda 
Acked-by: Paul E. McKenney 
Signed-off-by: Peter P Waskiewicz Jr

staging:android: Introduce the use of the managed version of kzalloc

2014-03-07T23:36:48+00:00

This patch moves shared private data kzalloc to managed devm_kzalloc and
cleans now unneccessary kfree in probe and remove functions.

Signed-off-by: Himangi Saraogi 
Acked-by: Paul E. McKenney 
Signed-off-by: Greg Kroah-Hartman

staging: ion: ion_cma_heap: Remove '0x' when using %pa format

2014-02-18T19:13:14+00:00

%pa format already prints in hexadecimal format, so remove the '0x' annotation
to avoid a double '0x0x' pattern.

Signed-off-by: Fabio Estevam 
Signed-off-by: Greg Kroah-Hartman

staging: ion: Add private buffer flag to skip page pooling on free

2014-02-18T19:05:08+00:00

Currently, when we free a buffer it might actually just go back into a
heap-specific page pool rather than going back to the system. This poses
a problem because sometimes (like when we're running a shrinker in low
memory conditions) we need to force the memory associated with the
buffer to truly be relinquished to the system rather than just going
back into a page pool.

There isn't a use case for this flag by Ion clients, so make it a
private flag. The main use case right now is to provide a mechanism for
the deferred free code to force stale buffers to bypass page pooling.

Cc: Colin Cross 
Cc: Android Kernel Team 
Signed-off-by: Mitchel Humpherys 
[jstultz: Minor commit subject tweak]
Signed-off-by: John Stultz 
Signed-off-by: Greg Kroah-Hartman

staging: ion: Move shrinker out of heaps

2014-02-18T19:05:08+00:00

Every heap that uses deferred frees is going to need a shrinker
to shrink the freelist under memory pressure.  Rather than
requiring each heap to implement a shrinker, automatically
register a shrinker if the deferred free flag is set.
The system heap also needs to shrink its page pools, so add
a shrink function to the heap ops that will be called after
shrinking the freelists.

Cc: Colin Cross 
Cc: Android Kernel Team 
Signed-off-by: Colin Cross 
[jstultz: Resolved big conflicts with the shrinker api change.
Also minor commit subject tweak.]
Signed-off-by: John Stultz 
Signed-off-by: Greg Kroah-Hartman

staging: ion: Make sure all clients are exposed in debugfs

2014-02-18T19:05:08+00:00

Currently, if multiple Ion clients are created with the same name, only
the first one shows up in debugfs. Rectify this by adding a
monotonically-increasing serial number to the debug names of Ion
clients.

Cc: Colin Cross 
Cc: Android Kernel Team 
Signed-off-by: Mitchel Humpherys 
[jstultz: Minor commit subject tweaks]
Signed-off-by: John Stultz 
Signed-off-by: Greg Kroah-Hartman

staging: ion: Store a copy of the client name on client creation

2014-02-18T19:05:08+00:00

Currently, we copy the pointer passed in to ion_client_create without
making a copy of the string itself. This approach is problematic since
it relies on the client keeping the name string in working order.

Cc: Colin Cross 
Cc: Android Kernel Team 
Signed-off-by: Mitchel Humpherys 
[jstultz: Minor commit subject tweaks]
Signed-off-by: John Stultz 
Signed-off-by: Greg Kroah-Hartman

staging: ion: Fix debugfs handling of multiple kernel clients

2014-02-18T19:05:08+00:00

Currently, Ion registers all debugfs entries for clients
via pid. If there are multiple kernel clients, this means
the debugfs entry only gets created for the first one. Fix
this by creating debugfs entries by name always. When
creating user clients, specify the name via the pid.

Cc: Colin Cross 
Cc: Android Kernel Team 
Signed-off-by: Laura Abbott 
Signed-off-by: Mitchel Humpherys 
[jstultz: Minor commit subject tweaks]
Signed-off-by: John Stultz 
Signed-off-by: Greg Kroah-Hartman