On Thu, 4 Sep 2025 00:52:20 +0200 Florian Westphal wrote: > 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. 👍️ FWIW I'll be sending the PR tomorrow so plenty time..
