Author: kevans
Date: Sat Feb 22 16:20:04 2020
New Revision: 358248
URL: https://svnweb.freebsd.org/changeset/base/358248
Log:
vm_radix: prefer __builtin_unreachable() to an unreachable panic()
This provides the needed hint to GCC and offers an annotation for readers to
observe that it's in-fact impossible to hit this point. We'll get hit with a
a -Wswitch error if the enum applicable to the switch above were to get
expanded without the new value(s) being handled.
Modified:
head/sys/vm/vm_radix.c
Modified: head/sys/vm/vm_radix.c
==============================================================================
--- head/sys/vm/vm_radix.c Sat Feb 22 13:23:27 2020 (r358247)
+++ head/sys/vm/vm_radix.c Sat Feb 22 16:20:04 2020 (r358248)
@@ -208,8 +208,7 @@ vm_radix_node_load(smrnode_t *p, enum vm_radix_access
case SMR:
return (smr_entered_load(p, vm_radix_smr));
}
- /* This is unreachable, silence gcc. */
- panic("vm_radix_node_get: Unknown access type");
+ __unreachable();
}
static __inline void
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