*Sorry for the previous incomplete mail*
In highmem.c, the function kmap_high() does the following :
BUG_ON(pkmap_count[PKMAP_NR(vaddr)] < 2);
Why would this be a " serious bug"?
Don't usable entry have pkmap_count[] value as 0. (in map_new_virtual() )
if (!pkmap_count[last_pkmap_nr])
break;
How does that work! usable entries have pkmap_count zero but any value
less than 2 is a bug!
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