Don't run blkid on mmcblk[0-9]boot[0-9] devices because they contain
bootloaders or boot parameters, and not partitions or file systems.
(cherry picked from commit
8db704b28b4fd4d13e376cf3495005010443937e)
IMPORT{builtin}="blkid --noraid"
# probe filesystem metadata of disks
-KERNEL!="sr*", IMPORT{builtin}="blkid"
+KERNEL!="sr*|mmcblk[0-9]boot[0-9]", IMPORT{builtin}="blkid"
# by-label/by-uuid links (filesystem metadata)
ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{ID_FS_UUID_ENC}=="?*", SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_ENC}"