From e466de05194b666114713b753e2f4be1d4200140 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Tue, 3 Apr 2012 13:08:53 +0100 Subject: regmap: Export regcache_sync_region() regcache_sync_region() isn't going to be useful to most drivers if we don't export it since otherwise they can't use it when built modular. Signed-off-by: Mark Brown --- drivers/base/regmap/regcache.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 87f54dbf601b..74b69095def6 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -346,6 +346,7 @@ out: return ret; } +EXPORT_SYMBOL_GPL(regcache_sync_region); /** * regcache_cache_only: Put a register map into cache only mode -- cgit v1.2.3-58-ga151 From c04c1b9ee8f30c7a3a25e20e406247003f634ebe Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Wed, 4 Apr 2012 15:48:33 -0600 Subject: regmap: prevent division by zero in rbtree_show If there are no nodes in the cache, nodes will be 0, so calculating "registers / nodes" will cause division by zero. Signed-off-by: Stephen Warren Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- drivers/base/regmap/regcache-rbtree.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c index 5157fa04c2f0..ea76a90630bf 100644 --- a/drivers/base/regmap/regcache-rbtree.c +++ b/drivers/base/regmap/regcache-rbtree.c @@ -138,6 +138,7 @@ static int rbtree_show(struct seq_file *s, void *ignored) unsigned int base, top; int nodes = 0; int registers = 0; + int average; mutex_lock(&map->lock); @@ -152,8 +153,13 @@ static int rbtree_show(struct seq_file *s, void *ignored) registers += top - base + 1; } + if (nodes) + average = registers / nodes; + else + average = 0; + seq_printf(s, "%d nodes, %d registers, average %d registers\n", - nodes, registers, registers / nodes); + nodes, registers, average); mutex_unlock(&map->lock); -- cgit v1.2.3-58-ga151