/* * Copyright 2013-2015, Michael Ellerman, IBM Corp. * Licensed under GPLv2. */ #define _GNU_SOURCE /* For CPU_ZERO etc. */ #include <elf.h> #include <errno.h> #include <fcntl.h> #include <link.h> #include <sched.h> #include <stdio.h> #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> #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; } ss='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table> <table class='tabs'><tr><td> <a href='/cgit.cgi/linux/net-next.git/?h=nds-private-remove'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?h=nds-private-remove&id=5f155c2563592b1908a7df2dcbd44893fde3e419'>refs</a><a class='active' href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/adau1761.c?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/codecs/adau1761.c?h=nds-private-remove&id=5f155c2563592b1908a7df2dcbd44893fde3e419'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/codecs/adau1761.c?h=nds-private-remove&id=5f155c2563592b1908a7df2dcbd44893fde3e419'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/codecs/adau1761.c?h=nds-private-remove&id=5f155c2563592b1908a7df2dcbd44893fde3e419'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/adau1761.c'> <input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='5f155c2563592b1908a7df2dcbd44893fde3e419'/><select name='qt'> <option value='grep'>log msg</option> <option value='author'>author</option> <option value='committer'>committer</option> <option value='range'>range</option> </select> <input class='txt' type='search' size='10' name='q' value=''/> <input type='submit' value='search'/> </form> </td></tr></table> <div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&id=5f155c2563592b1908a7df2dcbd44893fde3e419'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&id=5f155c2563592b1908a7df2dcbd44893fde3e419'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc?h=nds-private-remove&id=5f155c2563592b1908a7df2dcbd44893fde3e419'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs?h=nds-private-remove&id=5f155c2563592b1908a7df2dcbd44893fde3e419'>codecs</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/adau1761.c?h=nds-private-remove&id=5f155c2563592b1908a7df2dcbd44893fde3e419'>adau1761.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/adau1761.c?h=nds-private-remove&id=5f155c2563592b1908a7df2dcbd44893fde3e419&showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>