[PATCH] iommufd: Fix iommu_vevent_header tables markup

From: Bagas Sanjaya
Date: Fri Mar 28 2025 - 07:47:23 EST


Stephen Rothwell reports htmldocs warnings on iommu_vevent_header
tables:

Documentation/userspace-api/iommufd:323: ./include/uapi/linux/iommufd.h:1048: CRITICAL: Unexpected section title or transition.

------------------------------------------------------------------------- [docutils]
WARNING: kernel-doc './scripts/kernel-doc -rst -enable-lineno -sphinx-version 8.1.3 ./include/uapi/linux/iommufd.h' processing failed with: Documentation/userspace-api/iommufd:323: ./include/uapi/linux/iommufd.h:1048: (SEVERE/4) Unexpected section title or transition.

-------------------------------------------------------------------------

These are because Sphinx confuses the tables for section headings. Fix
the table markup to squash away above warnings.

Fixes: e36ba5ab808e ("iommufd: Add IOMMUFD_OBJ_VEVENTQ and IOMMUFD_CMD_VEVENTQ_ALLOC")
Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Closes: https://lore.kernel.org/linux-next/20250318213359.5dc56fd1@xxxxxxxxxxxxxxxx/
Signed-off-by: Bagas Sanjaya <bagasdotme@xxxxxxxxx>
---
include/uapi/linux/iommufd.h | 25 ++++++++++++++++---------
1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h
index 81c31a36e14a97..fa479700918409 100644
--- a/include/uapi/linux/iommufd.h
+++ b/include/uapi/linux/iommufd.h
@@ -1045,21 +1045,26 @@ enum iommu_veventq_flag {
* [0, INT_MAX] where the following index of INT_MAX is 0
*
* Each iommufd_vevent_header reports a sequence index of the following vEVENT:
- * -------------------------------------------------------------------------
+ *
+ * +----------------------+-------+----------------------+-------+---+-------+
* | header0 {sequence=0} | data0 | header1 {sequence=1} | data1 |...| dataN |
- * -------------------------------------------------------------------------
+ * +----------------------+-------+----------------------+-------+---+-------+
+ *
* And this sequence index is expected to be monotonic to the sequence index of
* the previous vEVENT. If two adjacent sequence indexes has a delta larger than
* 1, it means that delta - 1 number of vEVENTs has lost, e.g. two lost vEVENTs:
- * -------------------------------------------------------------------------
+ *
+ * +-----+----------------------+-------+----------------------+-------+-----+
* | ... | header3 {sequence=3} | data3 | header6 {sequence=6} | data6 | ... |
- * -------------------------------------------------------------------------
+ * +-----+----------------------+-------+----------------------+-------+-----+
+ *
* If a vEVENT lost at the tail of the vEVENTQ and there is no following vEVENT
* providing the next sequence index, an IOMMU_VEVENTQ_FLAG_LOST_EVENTS header
* would be added to the tail, and no data would follow this header:
- * ---------------------------------------------------------------------------
+ *
+ * +--+----------------------+-------+-----------------------------------------+
* |..| header3 {sequence=3} | data3 | header4 {flags=LOST_EVENTS, sequence=4} |
- * ---------------------------------------------------------------------------
+ * +--+----------------------+-------+-----------------------------------------+
*/
struct iommufd_vevent_header {
__u32 flags;
@@ -1117,9 +1122,11 @@ struct iommu_vevent_arm_smmuv3 {
*
* Each vEVENT in a vEVENTQ encloses a struct iommufd_vevent_header followed by
* a type-specific data structure, in a normal case:
- * -------------------------------------------------------------
- * || header0 | data0 | header1 | data1 | ... | headerN | dataN ||
- * -------------------------------------------------------------
+ *
+ * +-+---------+-------+---------+-------+-----+---------+-------+-+
+ * | | header0 | data0 | header1 | data1 | ... | headerN | dataN | |
+ * +-+---------+-------+---------+-------+-----+---------+-------+-+
+ *
* unless a tailing IOMMU_VEVENTQ_FLAG_LOST_EVENTS header is logged (refer to
* struct iommufd_vevent_header).
*/

base-commit: 899ddafec3b4adeb324ebda146914980137c1553
--
An old man doll... just what I always wanted! - Clara