diff options
| author | Soeren Moch <smoch@web.de> | 2016-05-11 13:49:11 -0300 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2016-11-20 01:16:48 +0000 |
| commit | c62e1d539914b0062502f783d4889108c86e9f96 (patch) | |
| tree | f6edb4584a870ca0572b2a8c6d8a092ed7d63069 /include/linux | |
| parent | 0f7cc2971026a5e3c368bfd159838c5575ddfb86 (diff) | |
media: dvb_ringbuffer: Add memory barriers
commit ca6e6126db5494f18c6c6615060d4d803b528bff upstream.
Implement memory barriers according to Documentation/circular-buffers.txt:
- use smp_store_release() to update ringbuffer read/write pointers
- use smp_load_acquire() to load write pointer on reader side
- use ACCESS_ONCE() to load read pointer on writer side
This fixes data stream corruptions observed e.g. on an ARM Cortex-A9
quad core system with different types (PCI, USB) of DVB tuners.
Signed-off-by: Soeren Moch <smoch@web.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions