On Wed, Nov 19, 2008 at 17:17, rae l <crquan@gmail.com> wrote:
quoted text
> On Wed, Nov 19, 2008 at 11:57 PM, Greg KH <gregkh@suse.de> wrote:
>>>       ret = kobject_add(&q->kobj, kobject_get(&disk_to_dev(disk)->kobj),
>>> -                       "%s", "queue");
>>> +                       "queue");
>>
>> Why?  What does this change buy us?
>
> Dropping one parameter makes the function call a little faster, doesn't it?
>
> The results are the same,

Not that we should be able to measure it, but it should save some
cycles parsing the format character and retrieving the string pointer
from the stack, yes.

quoted text
> so if the string is constant, why not use it directly as the fmt string?

It should be fine for strings, where you can be sure they can never
contain a '%', sure.

Thanks,
Kay
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