[PATCH v4 5/6] powerpc: Add show_user_instructions()

[Joe Perches]

On Thu, 2018-08-02 at 21:42 -0300, Murilo Opsfelder Araujo wrote:
> > > diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
[]
> > > @@ -1299,6 +1299,46 @@ static void show_instructions(struct pt_regs *regs)
> > >   	pr_cont("\n");
> > >   }
> > > +void show_user_instructions(struct pt_regs *regs)
> > > +{
> > > +	int i;
> > > +	const char *prefix = KERN_INFO "%s[%d]: code: ";
> > > +	unsigned long pc = regs->nip - (instructions_to_print * 3 / 4 *
> > > +					sizeof(int));
> > > +
> > > +	printk(prefix, current->comm, current->pid);
> > 
> > Why not use pr_info() and remove KERN_INFO from *prefix ?
> 
> Because it doesn't compile:
> 
>   arch/powerpc/kernel/process.c:1317:10: error: expected ‘)’ before ‘prefix’
>     pr_info(prefix, current->comm, current->pid);
>             ^
>   ./include/linux/printk.h:288:21: note: in definition of macro ‘pr_fmt’
>    #define pr_fmt(fmt) fmt
>                      ^

What being suggested is using:

	pr_info("%s[%d]: code: ", current->comm, current->pid);