SYSLOG_ACTION_READ_ALL question

[Jeff Haran]

> -----Original Message-----
> From: kernelnewbies-bounces at kernelnewbies.org [mailto:kernelnewbies-
> bounces at kernelnewbies.org] On Behalf Of william douglas
> Sent: Thursday, August 11, 2011 1:23 PM
> To: kernelnewbies at kernelnewbies.org
> Subject: SYSLOG_ACTION_READ_ALL question
> 
> Hello all,
> 
> I'm trying to figure out why the do_syslog code in kernel/printk.c is
> using put_user instead of copy_to_user.
> 

I *THINK* this has something to do with copy_to_user not being
well-behaved in other than process context and since printk() gets
called in all contexts, it wouldn't be a safe operation.
But don't take my word for it.