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| author | Soeren Moch <smoch@web.de> | 2016-05-11 19:49:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-08-20 19:09:18 +0300 |
| commit | 9e416faea82dd9231228ba5025c9d62f041e7726 (patch) | |
| tree | f810cf48e2464ff7c2b77a730dbb4096952d97ce /drivers/media/platform | |
| parent | ddc35199f2ad8e30c3a018e5a71c56dc60a791cd (diff) | |
| download | linux-9e416faea82dd9231228ba5025c9d62f041e7726.tar.xz | |
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/media/platform')
0 files changed, 0 insertions, 0 deletions