Author: pluknet
Date: Tue Nov 12 20:13:10 2013
New Revision: 258069
URL: http://svnweb.freebsd.org/changeset/base/258069
Log:
Add VM_LAST, a special last element in enum VM_GUEST and use it in CTASSERT
to ensure that vm_guest range is covered by vm_guest_sysctl_names.
Suggested by: mjg
Modified:
head/sys/kern/subr_param.c
head/sys/sys/systm.h
Modified: head/sys/kern/subr_param.c
==============================================================================
--- head/sys/kern/subr_param.c Tue Nov 12 20:00:51 2013 (r258068)
+++ head/sys/kern/subr_param.c Tue Nov 12 20:13:10 2013 (r258069)
@@ -156,6 +156,7 @@ static const char *const vm_guest_sysctl
"hv",
NULL
};
+CTASSERT(nitems(vm_guest_sysctl_names) - 1 == VM_LAST);
#ifndef XEN
static const char *const vm_bnames[] = {
Modified: head/sys/sys/systm.h
==============================================================================
--- head/sys/sys/systm.h Tue Nov 12 20:00:51 2013 (r258068)
+++ head/sys/sys/systm.h Tue Nov 12 20:13:10 2013 (r258069)
@@ -72,7 +72,8 @@ extern int vm_guest; /* Running as virt
* ever implemented (e.g. vendor-specific paravirtualization features).
* Keep in sync with vm_guest_sysctl_names[].
*/
-enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN, VM_GUEST_HV };
+enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN, VM_GUEST_HV,
+ VM_LAST };
#if defined(WITNESS) || defined(INVARIANTS)
void kassert_panic(const char *fmt, ...) __printflike(1, 2);
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