large frame size warning when compiling

[Jay Aurabind]

Hello list, Time for a noob discussion,

When I was building the kernel, I found a warning from drivers/mfd/abx500-core.c, that the Frame size is larger than 1024 bytes. Apparently the stack frame size can be changed from the config, but my question is, whether 1024 bytes low ? I am on an x86_64 (core i3). 

abx500-core.c had an object of struct device being allocated on stack. So
dynamically allocating it makes the warning go away. Are there any
implications on using dynamic allocation on this particular code? I
mean, could there be some reason why the original developer went with static option ?


---
 drivers/mfd/abx500-core.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/abx500-core.c b/drivers/mfd/abx500-core.c
index f3a15aa..709a84f 100644
--- a/drivers/mfd/abx500-core.c
+++ b/drivers/mfd/abx500-core.c
@@ -154,15 +154,17 @@ EXPORT_SYMBOL(abx500_startup_irq_enabled);
 void abx500_dump_all_banks(void)
 {
 	struct abx500_ops *ops;
-	struct device dummy_child = {NULL};
+	struct device *dummy_child;
 	struct abx500_device_entry *dev_entry;
 
+	dummy_child = kzalloc(sizeof(struct device),GFP_KERNEL);
+
 	list_for_each_entry(dev_entry, &abx500_list, list) {
-		dummy_child.parent = dev_entry->dev;
+		dummy_child->parent = dev_entry->dev;
 		ops = &dev_entry->ops;
 
 		if ((ops != NULL) && (ops->dump_all_banks != NULL))
-			ops->dump_all_banks(&dummy_child);
+			ops->dump_all_banks(dummy_child);
 	}
 }
 EXPORT_SYMBOL(abx500_dump_all_banks);
-- 
1.9.1


--
Thanks and Regards,
Jay Aurabind
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 213 bytes
Desc: Digital signature
Url : http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20140507/a7231430/attachment.bin