SYS_read 106 arch/xtensa/platforms/iss/include/platform/simcall.h return __simc(SYS_read, fd, (int) buf, count); SYS_read 28 tools/testing/selftests/proc/proc-self-syscall.c return syscall(SYS_read, fd, buf, len); SYS_read 47 tools/testing/selftests/proc/proc-self-syscall.c (long)SYS_read, (long)fd, (long)buf2, (long)sizeof(buf2));