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diff --git a/sysutils/grub2-bhyve/Makefile b/sysutils/grub2-bhyve/Makefile
--- a/sysutils/grub2-bhyve/Makefile
+++ b/sysutils/grub2-bhyve/Makefile
@@ -1,7 +1,7 @@
PORTNAME= grub2-bhyve
DISTVERSIONPREFIX= v
DISTVERSION= 0.40
-PORTREVISION= 11
+PORTREVISION= 12
CATEGORIES= sysutils
PATCH_SITES+= https://github.com/grehan-freebsd/grub2-bhyve/commit/
diff --git a/sysutils/grub2-bhyve/files/patch-ext2.c b/sysutils/grub2-bhyve/files/patch-ext2.c
new file mode 100644
--- /dev/null
+++ b/sysutils/grub2-bhyve/files/patch-ext2.c
@@ -0,0 +1,42 @@
+--- grub-core/fs/ext2.c
++++ grub-core/fs/ext2.c
+@@ -100,7 +100,10 @@ GRUB_MOD_LICENSE ("GPLv3+");
+ #define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
+ #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 /* Extents used */
+ #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080
++#define EXT4_FEATURE_INCOMPAT_MMP 0x0100
+ #define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200
++#define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000
++#define EXT4_FEATURE_INCOMPAT_LARGEDIR 0x4000 /* >2GB or 3 level htree */
+
+ /* The set of back-incompatible features this driver DOES support. Add (OR)
+ * flags here as the related features are implemented into the driver. */
+@@ -114,8 +117,26 @@ GRUB_MOD_LICENSE ("GPLv3+");
+ * journal because they will ignore the journal, but the next
+ * ext3 driver to mount the volume will find the journal and
+ * replay it, potentially corrupting the metadata written by
+- * the ext2 drivers. Safe to ignore for this RO driver. */
+-#define EXT2_DRIVER_IGNORED_INCOMPAT ( EXT3_FEATURE_INCOMPAT_RECOVER )
++ * the ext2 drivers. Safe to ignore for this RO driver.
++ * mmp: Not really back-incompatible - was added as such to
++ * avoid multiple read-write mounts. Safe to ignore for this
++ * RO driver.
++ * checksum seed: Not really back-incompatible - was added to allow tools
++ * such as tune2fs to change the UUID on a mounted metadata
++ * checksummed filesystem. Safe to ignore for now since the
++ * driver doesn't support checksum verification. However, it
++ * has to be removed from this list if the support is added later.
++ * large_dir: Not back-incompatible given that the GRUB ext2 driver does
++ * not implement EXT2_FEATURE_COMPAT_DIR_INDEX. If the GRUB
++ * eventually supports the htree feature (aka dir_index)
++ * it should support 3 level htrees and then move
++ * EXT4_FEATURE_INCOMPAT_LARGEDIR to
++ * EXT2_DRIVER_SUPPORTED_INCOMPAT.
++ */
++#define EXT2_DRIVER_IGNORED_INCOMPAT ( EXT3_FEATURE_INCOMPAT_RECOVER \
++ | EXT4_FEATURE_INCOMPAT_MMP \
++ | EXT4_FEATURE_INCOMPAT_CSUM_SEED \
++ | EXT4_FEATURE_INCOMPAT_LARGEDIR)
+
+
+ #define EXT3_JOURNAL_MAGIC_NUMBER 0xc03b3998U

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