9 void *__vdsosym(const char *, const char *);
11 static void *volatile vdso_func;
13 typedef long (*getcpu_f)(unsigned *, unsigned *, void *);
15 static long getcpu_init(unsigned *cpu, unsigned *node, void *unused)
17 void *p = __vdsosym(VDSO_GETCPU_VER, VDSO_GETCPU_SYM);
18 getcpu_f f = (getcpu_f)p;
19 a_cas_p(&vdso_func, (void *)getcpu_init, p);
20 return f ? f(cpu, node, unused) : -ENOSYS;
23 static void *volatile vdso_func = (void *)getcpu_init;
27 int sched_getcpu(void)
32 #ifdef VDSO_GETCPU_SYM
33 getcpu_f f = (getcpu_f)vdso_func;
37 if (r != -ENOSYS) return __syscall_ret(r);
41 r = __syscall(SYS_getcpu, &cpu, 0, 0);
43 return __syscall_ret(r);