Hi All,
Thanks Victor
Can any one please tell me difference between kernal space & user space in
code perspective i.e in write function const char *buffer should point to
address of *hello* in RAM so how it is changing when i am accessing through
some kernel function because it is also accessing t
On Thu, Jan 1, 2015 at 2:24 AM, me storage wrote:
> I am learning char drivers.But i didn't understand write operation of char
> device driver properly. the below is my write operation
>
> static ssize_t dev_write(struct file *fil,const char __user *buff,size_t
> len,loff_t *off)
> {
> pr_info
I am learning char drivers.But i didn't understand write operation of char
device driver properly. the below is my write operation
static ssize_t dev_write(struct file *fil,const char __user
*buff,size_t len,loff_t *off)
{
pr_info("user input string %s\n",buff);
pr_info("user input string
