git: bc9432d0e701 - main - xen(4): Fix a common typo in a source code comments

The branch main has been updated by gbe (doc committer):

URL: https://cgit.FreeBSD.org/src/commit/?id=bc9432d0e701ad1fc982d7766be282df3cbe5417

commit bc9432d0e701ad1fc982d7766be282df3cbe5417
Author:     Gordon Bergling <gbe@FreeBSD.org>
AuthorDate: 2022-02-06 12:44:49 +0000
Commit:     Gordon Bergling <gbe@FreeBSD.org>
CommitDate: 2022-02-06 12:44:49 +0000

    xen(4): Fix a common typo in a source code comments
    
    - s/existance/existence/
    
    MFC after:      3 days
---
 sys/xen/xenbus/xenbusb.c       | 2 +-
 sys/xen/xenbus/xenbusb_back.c  | 2 +-
 sys/xen/xenbus/xenbusb_front.c | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/sys/xen/xenbus/xenbusb.c b/sys/xen/xenbus/xenbusb.c
index 09b59a64ab4e..e026f8203ea1 100644
--- a/sys/xen/xenbus/xenbusb.c
+++ b/sys/xen/xenbus/xenbusb.c
@@ -428,7 +428,7 @@ xenbusb_release_confighook(struct xenbusb_softc *xbs)
 }
 
 /**
- * \brief Verify the existance of attached device instances and perform
+ * \brief Verify the existence of attached device instances and perform
  *        probe/attach processing for newly arrived devices.
  *
  * \param dev  The NewBus device representing this XenBus bus.
diff --git a/sys/xen/xenbus/xenbusb_back.c b/sys/xen/xenbus/xenbusb_back.c
index e81d326e7a26..ae0c83237154 100644
--- a/sys/xen/xenbus/xenbusb_back.c
+++ b/sys/xen/xenbus/xenbusb_back.c
@@ -60,7 +60,7 @@ __FBSDID("$FreeBSD$");
 
 /*------------------ Private Device Attachment Functions  --------------------*/
 /**
- * \brief Probe for the existance of the XenBus back bus.
+ * \brief Probe for the existence of the XenBus back bus.
  *
  * \param dev  NewBus device_t for this XenBus back bus instance.
  *
diff --git a/sys/xen/xenbus/xenbusb_front.c b/sys/xen/xenbus/xenbusb_front.c
index 961539b07c30..7cb5bc33d1e7 100644
--- a/sys/xen/xenbus/xenbusb_front.c
+++ b/sys/xen/xenbus/xenbusb_front.c
@@ -60,7 +60,7 @@ __FBSDID("$FreeBSD$");
 
 /*------------------ Private Device Attachment Functions  --------------------*/
 /**
- * \brief Probe for the existance of the XenBus front bus.
+ * \brief Probe for the existence of the XenBus front bus.
  *
  * \param dev  NewBus device_t for this XenBus front bus instance.
  *