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-rw-r--r--arch/x86/mm/ioremap.c4
-rw-r--r--arch/x86/mm/pageattr.c21
-rw-r--r--include/asm-x86/cacheflush.h2
3 files changed, 23 insertions, 4 deletions
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 20c01f2b2e11..0cdb7f11ce49 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -95,10 +95,10 @@ int ioremap_change_attr(unsigned long vaddr, unsigned long size,
switch (prot_val) {
case _PAGE_CACHE_UC:
default:
- err = set_memory_uc(vaddr, nrpages);
+ err = _set_memory_uc(vaddr, nrpages);
break;
case _PAGE_CACHE_WB:
- err = set_memory_wb(vaddr, nrpages);
+ err = _set_memory_wb(vaddr, nrpages);
break;
}
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index f7d5ca170c22..938df5e8402b 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -19,6 +19,7 @@
#include <asm/uaccess.h>
#include <asm/pgalloc.h>
#include <asm/proto.h>
+#include <asm/pat.h>
/*
* The current flushing context - we pass it instead of 5 arguments:
@@ -770,18 +771,34 @@ static inline int change_page_attr_clear(unsigned long addr, int numpages,
return change_page_attr_set_clr(addr, numpages, __pgprot(0), mask);
}
-int set_memory_uc(unsigned long addr, int numpages)
+int _set_memory_uc(unsigned long addr, int numpages)
{
return change_page_attr_set(addr, numpages,
__pgprot(_PAGE_CACHE_UC));
}
+
+int set_memory_uc(unsigned long addr, int numpages)
+{
+ if (reserve_memtype(addr, addr + numpages * PAGE_SIZE,
+ _PAGE_CACHE_UC, NULL))
+ return -EINVAL;
+
+ return _set_memory_uc(addr, numpages);
+}
EXPORT_SYMBOL(set_memory_uc);
-int set_memory_wb(unsigned long addr, int numpages)
+int _set_memory_wb(unsigned long addr, int numpages)
{
return change_page_attr_clear(addr, numpages,
__pgprot(_PAGE_CACHE_MASK));
}
+
+int set_memory_wb(unsigned long addr, int numpages)
+{
+ free_memtype(addr, addr + numpages * PAGE_SIZE);
+
+ return _set_memory_wb(addr, numpages);
+}
EXPORT_SYMBOL(set_memory_wb);
int set_memory_x(unsigned long addr, int numpages)
diff --git a/include/asm-x86/cacheflush.h b/include/asm-x86/cacheflush.h
index 5396c212d8c0..5676fba10a09 100644
--- a/include/asm-x86/cacheflush.h
+++ b/include/asm-x86/cacheflush.h
@@ -34,6 +34,8 @@ int set_pages_nx(struct page *page, int numpages);
int set_pages_ro(struct page *page, int numpages);
int set_pages_rw(struct page *page, int numpages);
+int _set_memory_uc(unsigned long addr, int numpages);
+int _set_memory_wb(unsigned long addr, int numpages);
int set_memory_uc(unsigned long addr, int numpages);
int set_memory_wb(unsigned long addr, int numpages);
int set_memory_x(unsigned long addr, int numpages);
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