diff options
| author | Stephen Warren <swarren@nvidia.com> | 2012-04-04 15:48:28 -0600 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-04-15 14:18:17 -0700 |
| commit | 77a38d8012fd6603e25eb3aa7a012856ab0a6ae8 (patch) | |
| tree | ab042f988b2955ce947e758b158aa060aeda0ba1 /block/genhd.c | |
| parent | d5a70b9a3304ef71b0a0ba97a9933c579b1fa6b0 (diff) | |
regmap: introduce fast_io busses, and use a spinlock for them
Some bus types have very fast IO. For these, acquiring a mutex for every
IO operation is a significant overhead. Allow busses to indicate their IO
is fast, and enhance regmap to use a spinlock for those busses.
[Currently limited to native endian registers -- broonie]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
(cherry picked from commit bacdbe077342ecc9e7b3e374cc5a41995116706a)
Change-Id: I337f27a09f2b176b46e8f6d05401957a1abc0609
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/96503
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>
Diffstat (limited to 'block/genhd.c')
0 files changed, 0 insertions, 0 deletions