[PATCH] statx.2: Update STATX_WRITE_ATOMIC filesystem support

[John Garry <john.g.garry@oracle.com>]

Linux v6.13 will include atomic write support for xfs and ext4, so update
STATX_WRITE_ATOMIC commentary to mention that.

Signed-off-by: John Garry <john.g.garry@oracle.com>

diff --git a/man/man2/statx.2 b/man/man2/statx.2
index c5b5a28ec..2d33998c5 100644
--- a/man/man2/statx.2
+++ b/man/man2/statx.2
@@ -482,6 +482,15 @@ The minimum and maximum sizes (in bytes) supported for direct I/O
 .RB ( O_DIRECT )
 on the file to be written with torn-write protection.
 These values are each guaranteed to be a power-of-2.
+.IP
+.B STATX_WRITE_ATOMIC
+.RI ( stx_atomic_write_unit_min,
+.RI stx_atomic_write_unit_max,
+and
+.IR stx_atomic_write_segments_max )
+is supported on block devices since Linux 6.11.
+The support on regular files varies by filesystem;
+it is supported by xfs and ext4 since Linux 6.13.
 .TP
 .I stx_atomic_write_segments_max
 The maximum number of elements in an array of vectors
-- 
2.31.1