diff options
| author | Stephen Warren <swarren@nvidia.com> | 2012-04-04 23:48:28 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-04-06 11:47:34 +0200 |
| commit | bacdbe077342ecc9e7b3e374cc5a41995116706a (patch) | |
| tree | b5cf9547a0ab4a7fba287a3d654d132869057afa /drivers/base/regmap/regcache-rbtree.c | |
| parent | regmap: introduce explicit bus_context for bus callbacks (diff) | |
| download | linux-bacdbe077342ecc9e7b3e374cc5a41995116706a.tar.xz linux-bacdbe077342ecc9e7b3e374cc5a41995116706a.zip | |
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>
Diffstat (limited to 'drivers/base/regmap/regcache-rbtree.c')
| -rw-r--r-- | drivers/base/regmap/regcache-rbtree.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c index 5157fa04c2f0..cca46007d969 100644 --- a/drivers/base/regmap/regcache-rbtree.c +++ b/drivers/base/regmap/regcache-rbtree.c @@ -139,7 +139,7 @@ static int rbtree_show(struct seq_file *s, void *ignored) int nodes = 0; int registers = 0; - mutex_lock(&map->lock); + map->lock(map); for (node = rb_first(&rbtree_ctx->root); node != NULL; node = rb_next(node)) { @@ -155,7 +155,7 @@ static int rbtree_show(struct seq_file *s, void *ignored) seq_printf(s, "%d nodes, %d registers, average %d registers\n", nodes, registers, registers / nodes); - mutex_unlock(&map->lock); + map->unlock(map); return 0; } |