git: 939a62d673e6 - main - stand/zfs: Remove read-compatible features

The branch main has been updated by mav:

URL: https://cgit.FreeBSD.org/src/commit/?id=939a62d673e6c340ee2b7243074a529919e39196

commit 939a62d673e6c340ee2b7243074a529919e39196
Author:     Alexander Motin <mav@FreeBSD.org>
AuthorDate: 2023-11-04 16:26:25 +0000
Commit:     Alexander Motin <mav@FreeBSD.org>
CommitDate: 2023-11-04 16:26:25 +0000

    stand/zfs: Remove read-compatible features
    
    These features are marked as ZFEATURE_FLAG_READONLY_COMPAT and so
    irrelevant for read-only pool imports by the loader:
    
            "com.datto:resilver_defer",
            "com.delphix:obsolete_counts",
            "com.delphix:spacemap_histogram",
            "com.delphix:zpool_checkpoint",
            "com.intel:allocation_classes",
            "org.zfsonlinux:allocation_classes"
    
    This should cause no functional changes, just a code cleanup.
    
    MFC after:      2 months
---
 stand/libsa/zfs/zfsimpl.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/stand/libsa/zfs/zfsimpl.c b/stand/libsa/zfs/zfsimpl.c
index b904ead24e1d..253cfd2f16e3 100644
--- a/stand/libsa/zfs/zfsimpl.c
+++ b/stand/libsa/zfs/zfsimpl.c
@@ -113,23 +113,19 @@ typedef struct indirect_vsd {
 static vdev_list_t zfs_vdevs;
 
 /*
- * List of ZFS features supported for read
+ * List of supported read-incompatible ZFS features.  Do not add here features
+ * marked as ZFEATURE_FLAG_READONLY_COMPAT, they are irrelevant for read-only!
  */
 static const char *features_for_read[] = {
 	"com.datto:bookmark_v2",
 	"com.datto:encryption",
-	"com.datto:resilver_defer",
 	"com.delphix:bookmark_written",
 	"com.delphix:device_removal",
 	"com.delphix:embedded_data",
 	"com.delphix:extensible_dataset",
 	"com.delphix:head_errlog",
 	"com.delphix:hole_birth",
-	"com.delphix:obsolete_counts",
-	"com.delphix:spacemap_histogram",
 	"com.delphix:spacemap_v2",
-	"com.delphix:zpool_checkpoint",
-	"com.intel:allocation_classes",
 	"com.joyent:multi_vdev_crash_dump",
 	"com.klarasystems:vdev_zaps_v2",
 	"org.freebsd:zstd_compress",
@@ -138,7 +134,6 @@ static const char *features_for_read[] = {
 	"org.illumos:skein",
 	"org.open-zfs:large_blocks",
 	"org.openzfs:blake3",
-	"org.zfsonlinux:allocation_classes",
 	"org.zfsonlinux:large_dnode",
 	NULL
 };