Bug #13884
The code was incorrectly reserving memtypes using the page
virtual address instead of the physical address. Furthermore,
the code was not ignoring highmem pages as it ought to.
Signed-off-by: Thomas Hellstrom <thellst...@vmware.com>
---
arch/x86/mm/pageattr.c | 30 +++++++++++++++++++++---------
1 files changed, 21 insertions(+), 9 deletions(-)
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index d4327db..96dd4f6 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -590,9 +590,12 @@ static int __change_page_attr(struct cpa_data *cpa, int
primary)
unsigned int level;
pte_t *kpte, old_pte;
- if (cpa->flags & CPA_PAGES_ARRAY)
- address = (unsigned long)page_address(cpa->pages[cpa->curpage]);
- else if (cpa->flags & CPA_ARRAY)
+ if (cpa->flags & CPA_PAGES_ARRAY) {
+ struct page *page = cpa->pages[cpa->curpage];
+ if (unlikely(PageHighMem(page)))
+ return 0;
+ address = (unsigned long)page_address(page);
+ } else if (cpa->flags & CPA_ARRAY)
address = cpa->vaddr[cpa->curpage];
else
address = *cpa->vaddr;
@@ -696,9 +699,12 @@ static int cpa_process_alias(struct cpa_data *cpa)
* No need to redo, when the primary call touched the direct
* mapping already:
*/
- if (cpa->flags & CPA_PAGES_ARRAY)
- vaddr = (unsigned long)page_address(cpa->pages[cpa->curpage]);
- else if (cpa->flags & CPA_ARRAY)
+ if (cpa->flags & CPA_PAGES_ARRAY) {
+ struct page *page = cpa->pages[cpa->curpage];
+ if (unlikely(PageHighMem(page)))
+ return 0;
+ vaddr = (unsigned long)page_address(page);
+ } else if (cpa->flags & CPA_ARRAY)
vaddr = cpa->vaddr[cpa->curpage];
else
vaddr = *cpa->vaddr;
@@ -1118,7 +1124,9 @@ int set_pages_array_uc(struct page **pages, int
addrinarray)
int free_idx;
for (i = 0; i < addrinarray; i++) {
- start = (unsigned long)page_address(pages[i]);
+ if (PageHighMem(pages[i]))
+ continue;
+ start = page_to_pfn(pages[i]) << PAGE_SHIFT;
end = start + PAGE_SIZE;
if (reserve_memtype(start, end, _PAGE_CACHE_UC_MINUS, NULL))
goto err_out;
@@ -1131,7 +1139,9 @@ int set_pages_array_uc(struct page **pages, int
addrinarray)
err_out:
free_idx = i;
for (i = 0; i < free_idx; i++) {
- start = (unsigned long)page_address(pages[i]);
+ if (PageHighMem(pages[i]))
+ continue;
+ start = page_to_pfn(pages[i]) << PAGE_SHIFT;
end = start + PAGE_SIZE;
free_memtype(start, end);
}
@@ -1160,7 +1170,9 @@ int set_pages_array_wb(struct page **pages, int
addrinarray)
return retval;
for (i = 0; i < addrinarray; i++) {
- start = (unsigned long)page_address(pages[i]);
+ if (PageHighMem(pages[i]))
+ continue;
+ start = page_to_pfn(pages[i]) << PAGE_SHIFT;
end = start + PAGE_SIZE;
free_memtype(start, end);
}
--
1.5.4.3
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