Hello, Justus Winter, le Fri 02 May 2014 21:33:01 +0200, a écrit : > io_map_cached is like io_map, but reuses the old mapping if it is > applicable.
But AIUI, if it is not applicable, it does not unmap the previous mapping, so we lose virtual memory. A really transparent io_map_cached seems not really feasible, since you never know what the caller will do with the pointer. I'm wondering: why not just use phystokv() in acpi.c instead? Samuel
