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Index: sbin/fsck_ffs/pass5.c
===================================================================
--- sbin/fsck_ffs/pass5.c
+++ sbin/fsck_ffs/pass5.c
@@ -73,6 +73,7 @@
newcg->cg_niblk = fs->fs_ipg;
if (preen == 0 && yflag == 0 && fs->fs_magic == FS_UFS2_MAGIC &&
fswritefd != -1 && (fs->fs_metackhash & CK_CYLGRP) == 0 &&
+ getosreldate() >= P_OSREL_CK_CLYGRP &&
reply("ADD CYLINDER GROUP CHECKSUM PROTECTION") != 0) {
fs->fs_metackhash |= CK_CYLGRP;
rewritecg = 1;
Index: sbin/newfs/mkfs.c
===================================================================
--- sbin/newfs/mkfs.c
+++ sbin/newfs/mkfs.c
@@ -495,7 +495,7 @@
/*
* Set flags for metadata that is being check-hashed.
*/
- if (Oflag > 1)
+ if (Oflag > 1 && getosreldate() >= P_OSREL_CK_CLYGRP)
sblock.fs_metackhash = CK_CYLGRP;
/*
Index: sbin/newfs/newfs.c
===================================================================
--- sbin/newfs/newfs.c
+++ sbin/newfs/newfs.c
@@ -398,10 +398,6 @@
if (pp != NULL)
pp->p_size *= secperblk;
}
- if (getosreldate() < __FreeBSD_version) {
- warnx("%s is newer than the running kernel and may not be compatible",
- getprogname());
- }
mkfs(pp, special);
ufs_disk_close(&disk);
if (!jflag)
Index: sys/sys/param.h
===================================================================
--- sys/sys/param.h
+++ sys/sys/param.h
@@ -84,6 +84,7 @@
#define P_OSREL_SHUTDOWN_ENOTCONN 1100077
#define P_OSREL_MAP_GUARD 1200035
#define P_OSREL_WRFSBASE 1200041
+#define P_OSREL_CK_CLYGRP 1200046
#define P_OSREL_VMTOTAL64 1200054
#define P_OSREL_MAJOR(x) ((x) / 100000)

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