[PATCH 07/11] kobject: do not copy vargs, just pass them around

From: Greg Kroah-Hartman
Date: Wed Apr 30 2008 - 20:01:37 EST


From: Kay Sievers <kay.sievers@xxxxxxxx>

This prevents a few unneeded copies.

Signed-off-by: Kay Sievers <kay.sievers@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
lib/kobject.c | 28 ++++++++--------------------
1 files changed, 8 insertions(+), 20 deletions(-)

diff --git a/lib/kobject.c b/lib/kobject.c
index fd78740..718e510 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -216,21 +216,12 @@ static int kobject_add_internal(struct kobject *kobj)
static int kobject_set_name_vargs(struct kobject *kobj, const char *fmt,
va_list vargs)
{
- va_list aq;
- char *name;
-
- va_copy(aq, vargs);
- name = kvasprintf(GFP_KERNEL, fmt, vargs);
- va_end(aq);
-
- if (!name)
- return -ENOMEM;
-
/* Free the old name, if necessary. */
kfree(kobj->name);

- /* Now, set the new name */
- kobj->name = name;
+ kobj->name = kvasprintf(GFP_KERNEL, fmt, vargs);
+ if (!kobj->name)
+ return -ENOMEM;

return 0;
}
@@ -246,12 +237,12 @@ static int kobject_set_name_vargs(struct kobject *kobj, const char *fmt,
*/
int kobject_set_name(struct kobject *kobj, const char *fmt, ...)
{
- va_list args;
+ va_list vargs;
int retval;

- va_start(args, fmt);
- retval = kobject_set_name_vargs(kobj, fmt, args);
- va_end(args);
+ va_start(vargs, fmt);
+ retval = kobject_set_name_vargs(kobj, fmt, vargs);
+ va_end(vargs);

return retval;
}
@@ -301,12 +292,9 @@ EXPORT_SYMBOL(kobject_init);
static int kobject_add_varg(struct kobject *kobj, struct kobject *parent,
const char *fmt, va_list vargs)
{
- va_list aq;
int retval;

- va_copy(aq, vargs);
- retval = kobject_set_name_vargs(kobj, fmt, aq);
- va_end(aq);
+ retval = kobject_set_name_vargs(kobj, fmt, vargs);
if (retval) {
printk(KERN_ERR "kobject: can not set name properly!\n");
return retval;
--
1.5.5.1

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