arch_phys_wc_add
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## Name

arch_phys_wc_add — add a WC MTRR and handle errors if PAT is unavailable

## Synopsis

`int arch_phys_wc_add (` | unsigned long base,
| unsigned long size`)`;

## Arguments

`base`

  Physical base address

`size`

  Size of region

## Description

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.

Drivers must store the return value to pass to mtrr_del_wc_if_needed, but drivers should not try to interpret that return value.

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