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-rw-r--r--target/linux/generic/patches-4.4/101-MIPS-fix-cache-flushing-for-highmem-pages.patch12
1 files changed, 9 insertions, 3 deletions
diff --git a/target/linux/generic/patches-4.4/101-MIPS-fix-cache-flushing-for-highmem-pages.patch b/target/linux/generic/patches-4.4/101-MIPS-fix-cache-flushing-for-highmem-pages.patch
index d7220af9af..6a6c581bc5 100644
--- a/target/linux/generic/patches-4.4/101-MIPS-fix-cache-flushing-for-highmem-pages.patch
+++ b/target/linux/generic/patches-4.4/101-MIPS-fix-cache-flushing-for-highmem-pages.patch
@@ -79,17 +79,23 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
addr = (unsigned long) page_address(page);
flush_data_cache_page(addr);
-@@ -142,7 +161,12 @@ void __update_cache(struct vm_area_struc
+@@ -142,12 +161,17 @@ void __update_cache(struct vm_area_struc
if (unlikely(!pfn_valid(pfn)))
return;
page = pfn_to_page(pfn);
- if (page_mapping(page) && Page_dcache_dirty(page)) {
-+ if (!Page_dcache_dirty(page))
++ if (!Page_dcache_dirty(page) || !page_mapping(page))
+ return;
+
+ if (PageHighMem(page)) {
+ flush_highmem_page(page);
-+ } else if (page_mapping(page)) {
++ } else {
addr = (unsigned long) page_address(page);
if (exec || pages_do_alias(addr, address & PAGE_MASK))
flush_data_cache_page(addr);
+- ClearPageDcacheDirty(page);
+ }
++ ClearPageDcacheDirty(page);
+ }
+
+ unsigned long _page_cachable_default;