/* * Copyright 2013-2015, Michael Ellerman, IBM Corp. * Licensed under GPLv2. */ #define _GNU_SOURCE /* For CPU_ZERO etc. */ #include #include #include #include #include #include #include #include #include #include "utils.h" static char auxv[4096]; void *get_auxv_entry(int type) { ElfW(auxv_t) *p; void *result; ssize_t num; int fd; fd = open("/proc/self/auxv", O_RDONLY); if (fd == -1) { perror("open"); return NULL; } result = NULL; num = read(fd, auxv, sizeof(auxv)); if (num < 0) { perror("read"); goto out; } if (num > sizeof(auxv)) { printf("Overflowed auxv buffer\n"); goto out; } p = (ElfW(auxv_t) *)auxv; while (p->a_type != AT_NULL) { if (p->a_type == type) { result = (void *)p->a_un.a_val; break; } p++; } out: close(fd); return result; } int pick_online_cpu(void) { cpu_set_t mask; int cpu; CPU_ZERO(&mask); if (sched_getaffinity(0, sizeof(mask), &mask)) { perror("sched_getaffinity"); return -1; } /* We prefer a primary thread, but skip 0 */ for (cpu = 8; cpu < CPU_SETSIZE; cpu += 8) if (CPU_ISSET(cpu, &mask)) return cpu; /* Search for anything, but in reverse */ for (cpu = CPU_SETSIZE - 1; cpu >= 0; cpu--) if (CPU_ISSET(cpu, &mask)) return cpu; printf("No cpus in affinity mask?!\n"); return -1; } ='sub'>net-next plumbingsTobias Klauser

path: root/sound/soc/codecs/pcm1681.c

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