Author: andrew
Date: Sat Oct 15 09:54:22 2016
New Revision: 307349
URL: https://svnweb.freebsd.org/changeset/base/307349
Log:
Check we are in a critical section when calling vfp_discard. As we may call
it with a NULL thread pointer only check when it is non-NULL.
Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/arm64/arm64/vfp.c
Modified: head/sys/arm64/arm64/vfp.c
==============================================================================
--- head/sys/arm64/arm64/vfp.c Sat Oct 15 09:10:35 2016 (r307348)
+++ head/sys/arm64/arm64/vfp.c Sat Oct 15 09:54:22 2016 (r307349)
@@ -79,6 +79,10 @@ void
vfp_discard(struct thread *td)
{
+#ifdef INVARIANTS
+ if (td != NULL)
+ CRITICAL_ASSERT(td);
+#endif
if (PCPU_GET(fpcurthread) == td)
PCPU_SET(fpcurthread, NULL);
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