bc7e5d23be
After commit f7d5bcd35d42 ("selftests: kselftest: Mark functions that
unconditionally call exit() as __noreturn"), ksft_exit_...() functions
are marked as __noreturn, which means the return type should not be
'int' but 'void' because they are not returning anything (and never were
since exit() has always been called).
To facilitate updating the return type of these functions, remove
'return' before the calls to ksft_exit_...(), as __noreturn prevents the
compiler from warning that a caller of the ksft_exit functions does not
return a value because the program will terminate upon calling these
functions.
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
/* ADJ_FREQ Skew change test
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* by: john stultz (johnstul@us.ibm.com)
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* (C) Copyright IBM 2012
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* Licensed under the GPLv2
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*
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* NOTE: This is a meta-test which cranks the ADJ_FREQ knob and
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* then uses other tests to detect problems. Thus this test requires
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* that the raw_skew, inconsistency-check and nanosleep tests be
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* present in the same directory it is run from.
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*
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* To build:
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* $ gcc change_skew.c -o change_skew -lrt
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <sys/timex.h>
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#include <time.h>
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#include "../kselftest.h"
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#define NSEC_PER_SEC 1000000000LL
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int change_skew_test(int ppm)
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{
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struct timex tx;
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int ret;
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tx.modes = ADJ_FREQUENCY;
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tx.freq = ppm << 16;
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ret = adjtimex(&tx);
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if (ret < 0) {
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printf("Error adjusting freq\n");
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return ret;
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}
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ret = system("./raw_skew");
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ret |= system("./inconsistency-check");
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ret |= system("./nanosleep");
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return ret;
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}
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int main(int argc, char **argv)
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{
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struct timex tx;
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int i, ret;
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int ppm[5] = {0, 250, 500, -250, -500};
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/* Kill ntpd */
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ret = system("killall -9 ntpd");
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/* Make sure there's no offset adjustment going on */
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tx.modes = ADJ_OFFSET;
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tx.offset = 0;
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ret = adjtimex(&tx);
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if (ret < 0) {
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printf("Maybe you're not running as root?\n");
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return -1;
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}
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for (i = 0; i < 5; i++) {
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printf("Using %i ppm adjustment\n", ppm[i]);
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ret = change_skew_test(ppm[i]);
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if (ret)
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break;
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}
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/* Set things back */
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tx.modes = ADJ_FREQUENCY;
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tx.offset = 0;
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adjtimex(&tx);
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if (ret) {
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printf("[FAIL]");
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ksft_exit_fail();
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}
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printf("[OK]");
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ksft_exit_pass();
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}
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