Re: [PATCH] Kernel debugging: omap: print warning if CONFIG_DEBUG_LL is enabled

On Wed, Nov 08, 2017 at 10:36:04PM +0000, Russell King - ARM Linux wrote:

We don't need a compiler warning there, we probably need better help text against DEBUG_LL and against EARLY_PRINTK.

Actually, this is already clearly stated against DEBUG_LL:

Note that selecting this option will limit the kernel to a single UART definition, as specified below. Attempting to boot the kernel image on a different platform *will not work*, so this option should not be enabled for kernels that are intended to be portable.

and since EARLY_PRINTK depends on DEBUG_LL... I guess people don't read help texts anymore.