[PATCH 1/2 v2] regmap: debugfs: Simplify calculation of `c->max_reg'

Dimitris Papastamos
2013-02-20T12:15:26Z

We don't need to use any of the file position information
to calculate the base and max register of each block. Just
use the counter directly.

Set `i = base' at the top to avoid GCC flow analysis bugs. The
value of `i' can never be undefined or 0 in the if (c) { ... }.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
---
drivers/base/regmap/regmap-debugfs.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 78d5f20..e14cb2d 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -88,16 +88,15 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map,
* If we don't have a cache build one so we don't have to do a
* linear scan each time.
*/
+ i = base;
if (list_empty(&map->debugfs_off_cache)) {
- for (i = base; i <= map->max_register; i += map->reg_stride) {
+ for (; i <= map->max_register; i += map->reg_stride) {
/* Skip unprinted registers, closing off cache entry */
if (!regmap_readable(map, i) ||
regmap_precious(map, i)) {
if (c) {
c->max = p - 1;
- fpos_offset = c->max - c->min;
- reg_offset = fpos_offset / map->debugfs_tot_len;
- c->max_reg = c->base_reg + reg_offset;
+ c->max_reg = i - map->reg_stride;
list_add_tail(&c->list,
&map->debugfs_off_cache);
c = NULL;
@@ -124,9 +123,7 @@ static unsigned int regmap_debugfs_get_dump_start(struct regmap *map,
/* Close the last entry off if we didn't scan beyond it */
if (c) {
c->max = p - 1;
- fpos_offset = c->max - c->min;
- reg_offset = fpos_offset / map->debugfs_tot_len;
- c->max_reg = c->base_reg + reg_offset;
+ c->max_reg = i - map->reg_stride;
list_add_tail(&c->list,
&map->debugfs_off_cache);
}
--
1.8.1.3