diff options
| author | Visa Hankala <visa@cvs.openbsd.org> | 2021-03-04 15:38:07 +0000 |
|---|---|---|
| committer | Visa Hankala <visa@cvs.openbsd.org> | 2021-03-04 15:38:07 +0000 |
| commit | 8c3d2e6947f37024afe49ddd4b671287f6ef41f6 (patch) | |
| tree | f466eb2b945e8a8093d4a256c93a113acb7340ca | |
| parent | e00a14477c77f626c40b099a81d4c527df158400 (diff) | |
Update clock interrupt count atomically.
This avoids errors that can arise when multiple cores update the
variable at the same time.
| -rw-r--r-- | sys/arch/mips64/mips64/clock.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sys/arch/mips64/mips64/clock.c b/sys/arch/mips64/mips64/clock.c index 5fbc090ba28..bd2e01c2d61 100644 --- a/sys/arch/mips64/mips64/clock.c +++ b/sys/arch/mips64/mips64/clock.c @@ -1,4 +1,4 @@ -/* $OpenBSD: clock.c,v 1.42 2020/06/30 14:56:10 visa Exp $ */ +/* $OpenBSD: clock.c,v 1.43 2021/03/04 15:38:06 visa Exp $ */ /* * Copyright (c) 2001-2004 Opsycon AB (www.opsycon.se / www.opsycon.com) @@ -37,6 +37,7 @@ #include <sys/param.h> #include <sys/kernel.h> #include <sys/systm.h> +#include <sys/atomic.h> #include <sys/device.h> #include <sys/evcount.h> @@ -149,7 +150,8 @@ cp0_int5(uint32_t mask, struct trapframe *tf) ENABLEIPI(); #endif while (ci->ci_pendingticks) { - cp0_clock_count.ec_count++; + atomic_inc_long( + (unsigned long *)&cp0_clock_count.ec_count); hardclock(tf); ci->ci_pendingticks--; } |