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s390/cpum_cf_diag: use get_tod_clock_fast()

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Use get_tod_clock_fast() instead of store_tod_clock(), since
store_tod_clock() can be very slow.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2021-02-01 21:40:22 +01:00 • committed by Vasily Gorbik
parent b29c509382
commit 683071b02c
1 changed files with 1 additions and 1 deletions
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arch/s390/kernel/perf_cpum_cf_diag.c
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@ -119,7 +119,7 @@ static void cf_diag_trailer(struct cf_trailer_entry *te)
te->speed = 1;
te->clock_base = 1; /* Save clock base */
memcpy(&te->tod_base, &tod_clock_base[1], 8);
store_tod_clock((__u64 *)&te->timestamp);
te->timestamp = get_tod_clock_fast();
}
/*