From: Heiko Carstens <hca@linux.ibm.com>
Date: Mon, 1 Feb 2021 20:40:22 +0000 (+0100)
Subject: s390/cpum_cf_diag: use get_tod_clock_fast()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=683071b02c440eb84d9133dc33bd3d3d37522a5f;p=linux.git

s390/cpum_cf_diag: use get_tod_clock_fast()

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>
---

diff --git a/arch/s390/kernel/perf_cpum_cf_diag.c b/arch/s390/kernel/perf_cpum_cf_diag.c
index e949ab832ed75..6f6b3382edb72 100644
--- a/arch/s390/kernel/perf_cpum_cf_diag.c
+++ b/arch/s390/kernel/perf_cpum_cf_diag.c
@@ -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();
 }
 
 /*