HelenOS sources

tlb_shootdown_ipi  228 kernel/arch/amd64/src/interrupt.c 	    (iroutine_t) tlb_shootdown_ipi);
tlb_shootdown_ipi  251 kernel/arch/ia32/src/interrupt.c 	    (iroutine_t) tlb_shootdown_ipi);
HelenOS homepage, sources at GitHub