Author: mjg
Date: Thu Nov 5 02:12:08 2020
New Revision: 367357
URL: https://svnweb.freebsd.org/changeset/base/367357
Log:
fd: hide _fdrop 0 count check behind INVARIANTS
While here use refcount_load and make sure to report the tested value.
Modified:
head/sys/kern/kern_descrip.c
Modified: head/sys/kern/kern_descrip.c
==============================================================================
--- head/sys/kern/kern_descrip.c Thu Nov 5 00:52:52 2020
(r367356)
+++ head/sys/kern/kern_descrip.c Thu Nov 5 02:12:08 2020
(r367357)
@@ -3219,9 +3219,13 @@ int __noinline
_fdrop(struct file *fp, struct thread *td)
{
int error;
+#ifdef INVARIANTS
+ int count;
- if (fp->f_count != 0)
- panic("fdrop: count %d", fp->f_count);
+ count = refcount_load(&fp->f_count);
+ if (count != 0)
+ panic("fdrop: fp %p count %d", fp, count);
+#endif
error = fo_close(fp, td);
atomic_subtract_int(&openfiles, 1);
crfree(fp->f_cred);
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