[PATCH 2/3] rbd: reduce memory used for rbd_dev fields

[Alex Elder <elder@dreamhost.com>]

The length of the string containing the monitor address
specification(s) will never exceed the length of the string passed
in to rbd_add().  The same holds true for the ceph + rbd options
string.  So reduce the amount of memory allocated for these to
that length rather than the maximum (1024 bytes).

Signed-off-by: Alex Elder <elder@dreamhost.com>
---
  drivers/block/rbd.c |    4 ++--
  1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index d5b4500..1488a52 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -2233,11 +2233,11 @@ static ssize_t rbd_add(struct bus_type *bus,
  	if (!try_module_get(THIS_MODULE))
  		return -ENODEV;

-	mon_dev_name = kmalloc(RBD_MAX_OPT_LEN, GFP_KERNEL);
+	mon_dev_name = kmalloc(count, GFP_KERNEL);
  	if (!mon_dev_name)
  		goto err_out_mod;

-	options = kmalloc(RBD_MAX_OPT_LEN, GFP_KERNEL);
+	options = kmalloc(count, GFP_KERNEL);
  	if (!options)
  		goto err_mon_dev;

-- 
1.7.5.4