diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/pageattr.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index 938df5e8402b..270cab2e6030 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -787,6 +787,25 @@ int set_memory_uc(unsigned long addr, int numpages) } EXPORT_SYMBOL(set_memory_uc); +int _set_memory_wc(unsigned long addr, int numpages) +{ + return change_page_attr_set(addr, numpages, + __pgprot(_PAGE_CACHE_WC)); +} + +int set_memory_wc(unsigned long addr, int numpages) +{ + if (!pat_wc_enabled) + return set_memory_uc(addr, numpages); + + if (reserve_memtype(addr, addr + numpages * PAGE_SIZE, + _PAGE_CACHE_WC, NULL)) + return -EINVAL; + + return _set_memory_wc(addr, numpages); +} +EXPORT_SYMBOL(set_memory_wc); + int _set_memory_wb(unsigned long addr, int numpages) { return change_page_attr_clear(addr, numpages, |