Around Thu 28 Jan 2016 12:46:17 -0700 or thereabout, Jeffrey Merkey wrote:
> This patch series adds an export which can be set by system debuggers to
> direct the hard lockup and soft lockup detector to trigger a breakpoint
> exception and enter a debugger if one is active. It is assumed that if
> someone sets this variable, then an breakpoint handler of some sort will
> be actively loaded or registered via the notify die handler chain.
>
> This addition is extremely useful for debugging hard and soft lockups
> real time and quickly from a console debugger.
>
> Signed-off-by: Jeffrey Merkey <jeffmer...@gmail.com>
Acked-by: Hans-Christian Egtvedt <egtv...@samfundet.no>
> ---
> arch/avr32/include/asm/kdebug.h | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/arch/avr32/include/asm/kdebug.h b/arch/avr32/include/asm/kdebug.h
> index f930ce2..f67caf0 100644
> --- a/arch/avr32/include/asm/kdebug.h
> +++ b/arch/avr32/include/asm/kdebug.h
> @@ -1,6 +1,10 @@
> #ifndef __ASM_AVR32_KDEBUG_H
> #define __ASM_AVR32_KDEBUG_H
>
> +static inline void arch_breakpoint(void)
> +{
> +}
Will not this just be optimized away? Are you expecting other developers to
add a no-op assembler instruction into this function body?
<snipp>
--
Best regards, Hans-Christian Egtvedt
