kernel: add workaround to rebuild vdso-o32.so.dbg

[openwrt/openwrt.git] / target / linux / generic / patches-4.4 / 101-MIPS-fix-cache-flushing-for-highmem-pages.patch

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 d7220af9afc55b2f90214aee5d82410570b7de19..6a6c581bc557a2e58bf9506dc16b3ed3ed52c74f 100644 (file)
--- 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;