Re: [RFC PATCH] powerpc: use __builtin_trap() in BUG/WARN macros.

Hi Christophe, On Sat, Aug 17, 2019 at 06:37:50PM +, Christophe Leroy wrote: > #define BUG() do { \ > + __builtin_trap(); \ GCC will optimise away all code after this, it knows it is unreachable. But you want

[RFC PATCH] powerpc: use __builtin_trap() in BUG/WARN macros.

The below exemples of use of WARN_ON() show that the result is sub-optimal in regard of the capabilities of powerpc. void test_warn1(unsigned long long a) { WARN_ON(a); } void test_warn2(unsigned long a) { WARN_ON(a); } void test_warn3(unsigned long a, unsigned long b) {