The branch main has been updated by kib:
URL:
https://cgit.FreeBSD.org/src/commit/?id=619fe095861274576a2cb45628076968051b1585
commit 619fe095861274576a2cb45628076968051b1585
Author: Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2021-04-22 19:40:08 +0000
Commit: Konstantin Belousov <k...@freebsd.org>
CommitDate: 2021-04-30 14:43:45 +0000
ioccom: define ioctl cmd value that can never be valid
Its use is for cases where some filler is needed for cmd, or we need an
indication that there were no cmd supplied, and so on.
Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29935
---
sys/sys/ioccom.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/sys/sys/ioccom.h b/sys/sys/ioccom.h
index 0329ac358491..13faba046719 100644
--- a/sys/sys/ioccom.h
+++ b/sys/sys/ioccom.h
@@ -79,6 +79,9 @@
#define IOCPARM_IVAL(x) ((int)(intptr_t)(void *)*(caddr_t *)(void *)(x))
#endif
+#define _IOC_INVALID (_IOC_VOID|_IOC_INOUT) /* Never valid cmd
value,
+ use as filler */
+
#else
#include <sys/cdefs.h>
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