[PATCH 4/9] man/man2/statmount.2: Document STATMOUNT_SB_SOURCE

Document STATMOUNT_SB_SOURCE flag and the corresponding field introduced
by it. This text is based on this commit message [1].

Link [1]:
<https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=44010543fc8bedad172aa5b6c43480e5d2124497>

Signed-off-by: Bhavik Sachdev <[email protected]>
---
 man/man2/statmount.2 | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/man/man2/statmount.2 b/man/man2/statmount.2
index 462f6060e..8d390fc53 100644
--- a/man/man2/statmount.2
+++ b/man/man2/statmount.2
@@ -51,6 +51,7 @@ .SH SYNOPSIS
 .B "    __u32  mnt_point;"
 .B "    __u64  mnt_ns_id;"
 .B "    __u32  fs_subtype;"
+.B "    __u32  sb_source;"
 .B "    char   str[];"
 .B };
 .EE
@@ -112,6 +113,7 @@ .SS The mnt_id_req structure
 STATMOUNT_MNT_NS_ID	/* Want/got mnt_ns_id */
 STATMOUNT_MNT_OPTS	/* Want/got mnt_opts */
 STATMOUNT_FS_SUBTYPE	/* Want/got fs_subtype */
+STATMOUNT_SB_SOURCE	/* Want/got sb_source */
 .TE
 .in
 .P
@@ -269,6 +271,13 @@ .SS The returned information
 This is particularly useful for disambiguating FUSE mounts.
 It is a null-terminated string.
 .TP
+.TP
+.I smbuf.sb_source
+The offset to the location in the
+.I smbuf.str
+the source for the mount.
+It is a null-terminated string.
+.TP
 .SH RETURN VALUE
 On success, zero is returned.
 On error, \-1 is returned, and
-- 
2.52.0