arkfb: new framebuffer driver for ARK Logic cards

[powerpc.git] / include / linux / highmem.h

diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 3d8768b..98e2cce 100644 (file)
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -8,7 +8,7 @@
 #include <asm/cacheflush.h>
 
 #ifndef ARCH_HAS_FLUSH_ANON_PAGE
-static inline void flush_anon_page(struct page *page, unsigned long vmaddr)
+static inline void flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
 {
 }
 #endif
@@ -27,6 +27,8 @@ static inline void flush_kernel_dcache_page(struct page *page)
 unsigned int nr_free_highpages(void);
 extern unsigned long totalhigh_pages;
 
+void kmap_flush_unused(void);
+
 #else /* CONFIG_HIGHMEM */
 
 static inline unsigned int nr_free_highpages(void) { return 0; }
@@ -42,11 +44,20 @@ static inline void *kmap(struct page *page)
 
 #define kunmap(page) do { (void) (page); } while (0)
 
-#define kmap_atomic(page, idx) \
-       ({ pagefault_disable(); page_address(page); })
+#include <asm/kmap_types.h>
+
+static inline void *kmap_atomic(struct page *page, enum km_type idx)
+{
+       pagefault_disable();
+       return page_address(page);
+}
+#define kmap_atomic_prot(page, idx, prot)      kmap_atomic(page, idx)
+
 #define kunmap_atomic(addr, idx)       do { pagefault_enable(); } while (0)
 #define kmap_atomic_pfn(pfn, idx)      kmap_atomic(pfn_to_page(pfn), (idx))
 #define kmap_atomic_to_page(ptr)       virt_to_page(ptr)
+
+#define kmap_flush_unused()    do {} while(0)
 #endif
 
 #endif /* CONFIG_HIGHMEM */
@@ -83,20 +94,32 @@ static inline void clear_highpage(struct page *page)
 
 /*
  * Same but also flushes aliased cache contents to RAM.
+ *
+ * This must be a macro because KM_USER0 and friends aren't defined if
+ * !CONFIG_HIGHMEM
  */
-static inline void memclear_highpage_flush(struct page *page, unsigned int offset, unsigned int size)
+#define zero_user_page(page, offset, size, km_type)            \
+       do {                                                    \
+               void *kaddr;                                    \
+                                                               \
+               BUG_ON((offset) + (size) > PAGE_SIZE);          \
+                                                               \
+               kaddr = kmap_atomic(page, km_type);             \
+               memset((char *)kaddr + (offset), 0, (size));    \
+               flush_dcache_page(page);                        \
+               kunmap_atomic(kaddr, (km_type));                \
+       } while (0)
+
+static inline void __deprecated memclear_highpage_flush(struct page *page,
+                       unsigned int offset, unsigned int size)
 {
-       void *kaddr;
-
-       BUG_ON(offset + size > PAGE_SIZE);
-
-       kaddr = kmap_atomic(page, KM_USER0);
-       memset((char *)kaddr + offset, 0, size);
-       flush_dcache_page(page);
-       kunmap_atomic(kaddr, KM_USER0);
+       zero_user_page(page, offset, size, KM_USER0);
 }
 
-static inline void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr)
+#ifndef __HAVE_ARCH_COPY_USER_HIGHPAGE
+
+static inline void copy_user_highpage(struct page *to, struct page *from,
+       unsigned long vaddr, struct vm_area_struct *vma)
 {
        char *vfrom, *vto;
 
@@ -109,6 +132,8 @@ static inline void copy_user_highpage(struct page *to, struct page *from, unsign
        smp_wmb();
 }
 
+#endif
+
 static inline void copy_highpage(struct page *to, struct page *from)
 {
        char *vfrom, *vto;