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-rw-r--r--sys/kern/subr_trap.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/sys/kern/subr_trap.c b/sys/kern/subr_trap.c
index 686f613..c6af66b 100644
--- a/sys/kern/subr_trap.c
+++ b/sys/kern/subr_trap.c
@@ -182,9 +182,11 @@ ast(struct trapframe *framep)
mtx_lock_spin(&sched_lock);
flags = td->td_flags;
sflag = p->p_sflag;
- p->p_sflag &= ~(PS_ALRMPEND | PS_PROFPEND | PS_XCPU);
+ if (p->p_sflag & (PS_ALRMPEND | PS_PROFPEND | PS_XCPU))
+ p->p_sflag &= ~(PS_ALRMPEND | PS_PROFPEND | PS_XCPU);
#ifdef MAC
- p->p_sflag &= ~PS_MACPEND;
+ if (p->p_sflag & PS_MACPEND)
+ p->p_sflag &= ~PS_MACPEND;
#endif
td->td_flags &= ~(TDF_ASTPENDING | TDF_NEEDSIGCHK |
TDF_NEEDRESCHED | TDF_INTERRUPT);
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