kernel: split patches folder up into backport, pending and hack folders

[openwrt/staging/dedeckeh.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
deleted file mode 100644 (file)
index e4ac2cd..0000000
--- a/target/linux/generic/patches-4.4/101-MIPS-fix-cache-flushing-for-highmem-pages.patch
+++ /dev/null
@@ -1,31 +0,0 @@
-From: Felix Fietkau <nbd@nbd.name>
-Date: Sun, 24 Jan 2016 01:03:51 +0100
-Subject: [PATCH] MIPS: fix cache flushing for highmem pages
-
-Most cache flush ops were no-op for highmem pages. This led to nasty
-segfaults and (in the case of page_address(page) == NULL) kernel
-crashes.
-
-Fix this by always flushing highmem pages using kmap/kunmap_atomic
-around the actual cache flush. This might be a bit inefficient, but at
-least it's stable.
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
-
---- a/arch/mips/mm/cache.c
-+++ b/arch/mips/mm/cache.c
-@@ -111,6 +111,13 @@ void __flush_anon_page(struct page *page
- {
-       unsigned long addr = (unsigned long) page_address(page);
- 
-+      if (PageHighMem(page)) {
-+              addr = (unsigned long)kmap_atomic(page);
-+              flush_data_cache_page(addr);
-+              __kunmap_atomic((void *)addr);
-+              return;
-+      }
-+
-       if (pages_do_alias(addr, vmaddr)) {
-               if (page_mapped(page) && !Page_dcache_dirty(page)) {
-                       void *kaddr;