git: 0ed3a19a3896 - stable/13 - LinuxKPI: Import linux/poison.h header

The branch stable/13 has been updated by wulf:

URL: https://cgit.FreeBSD.org/src/commit/?id=0ed3a19a3896806cbbb5c2eb3abd6e3c473941bb

commit 0ed3a19a3896806cbbb5c2eb3abd6e3c473941bb
Author:     Vladimir Kondratyev <wulf@FreeBSD.org>
AuthorDate: 2021-09-29 20:14:34 +0000
Commit:     Vladimir Kondratyev <wulf@FreeBSD.org>
CommitDate: 2021-10-13 09:04:11 +0000

    LinuxKPI: Import linux/poison.h header
    
    Required by drm-kmod 5.6
    
    Reviewed by:    hselasky, imp, manu
    Obtained from:  OpenBSD
    Differential revision:  https://reviews.freebsd.org/D32092
    
    (cherry picked from commit 6efabdeede7f3aac4b133116a421f5a7a721e24c)
---
 sys/compat/linuxkpi/common/include/linux/poison.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sys/compat/linuxkpi/common/include/linux/poison.h b/sys/compat/linuxkpi/common/include/linux/poison.h
new file mode 100644
index 000000000000..35ccb5b5499a
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/poison.h
@@ -0,0 +1,9 @@
+/* Public domain. */
+
+#ifndef _LINUX_POISON_H
+#define _LINUX_POISON_H
+
+#define POISON_INUSE	0xdb
+#define POISON_FREE	0xdf
+
+#endif