Re: [PATCH v2] printk: move dump stack related code to lib/dump_stack.c

[Sergey Senozhatsky]

On (02/13/18 15:28), Dave Young wrote:
> 
> dump_stack related stuff should belong to lib/dump_stack.c thus move them
> there. Also conditionally compile lib/dump_stack.c since dump_stack code
> does not make sense if printk is disabled.
> 
> Signed-off-by: Dave Young <dyoung@xxxxxxxxxx>
> Suggested-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
> Suggested-by: Sergey Senozhatsky <sergey.senozhatsky.work@xxxxxxxxx>

Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>


The patch also saves us some additional memory on !PRINTK configs.
For example things like this

	if (kobj->state_initialized) {
		/* do not error out as sometimes we can recover */
		printk(KERN_ERR "kobject (%p): tried to init an initialized "
		       "object, something is seriously wrong.\n", kobj);
		dump_stack();
	}

now we won't have that dump_stack() call, which does not seems to be doing
anything useful anyway when printk() is not available.

	-ss