Jakub Kicinski <kuba@xxxxxxxxxx> wrote: > On Tue, 2 Sep 2025 20:58:54 +0200 Florian Westphal wrote: > > Yi Chen reports that 'udpclash' loops forever depending on compiler > > (and optimization level used); while (x == 1) gets optimized into > > for (;;). Switch to stdatomic to prevent this. > > gcc version 15.1.1 (F42) w/ whatever flags kselftests use appear to be > unaware of this macro: > > udpclash.c:33:26: error: implicit declaration of function ‘ATOMIC_VAR_INIT’; did you mean ‘ATOMIC_FLAG_INIT’? [-Wimplicit-function-declaration] > 33 | static atomic_int wait = ATOMIC_VAR_INIT(1); > | ^~~~~~~~~~~~~~~ > | ATOMIC_FLAG_INIT > udpclash.c:33:26: error: initializer element is not constant > Could you perhaps use volatile instead? That works too. I'll send a new PR tomorrow, its late here.
