arch_phys_wc_add9
Add a wc mtrr and handle errors if pat is unavailable
Usage
int arch_phys_wc_add(unsigned long base, unsigned long size);
Arguments
base
Physical base address
size
Size of region
Overview
If PAT is available, this does nothing. If PAT is unavailable, it attempts to add a WC MTRR covering size bytes starting at base and logs an error if this fails.
The called should provide a power of two size on an equivalent power of two boundary.
Drivers must store the return value to pass to mtrr_del_wc_if_needed, but drivers should not try to interpret that return value.
Releases
2 releases since Debian 8 (Jessie); the text changed 1 time.