udev: add zram to the list of devices inappropriate for symlinks

udev seems to have a race condition with swapon to see which can open
/dev/zram0 first, causing swapon to fail. Seems to be most noticeable
on arm devices one out of every 7 times or something.

diff --git a/rules/60-persistent-storage.rules b/rules/60-persistent-storage.rules
index a4d009a..154ffd9 100644 (file)
--- a/rules/60-persistent-storage.rules
+++ b/rules/60-persistent-storage.rules
@@ -14,7 +14,7 @@ ACTION=="add", SUBSYSTEM=="module", KERNEL=="block", ATTR{parameters/events_dfl_
 SUBSYSTEM!="block", GOTO="persistent_storage_end"
 
 # skip rules for inappropriate block devices
-KERNEL=="fd*|mtd*|nbd*|gnbd*|btibm*|dm-*|md*", GOTO="persistent_storage_end"
+KERNEL=="fd*|mtd*|nbd*|gnbd*|btibm*|dm-*|md*|zram*", GOTO="persistent_storage_end"
 
 # ignore partitions that span the entire disk
 TEST=="whole_disk", GOTO="persistent_storage_end"