fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / include / linux / highmem.h

diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 6bece92..8941f12 100644 (file)
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -1,23 +1,45 @@
 #ifndef _LINUX_HIGHMEM_H
 #define _LINUX_HIGHMEM_H
 
-#include <linux/config.h>
 #include <linux/fs.h>
 #include <linux/mm.h>
+#include <linux/uaccess.h>
 
 #include <asm/cacheflush.h>
 
+#ifndef ARCH_HAS_FLUSH_ANON_PAGE
+static inline void flush_anon_page(struct vm_area_struct *vma, struct page *page, unsigned long vmaddr)
+{
+}
+#endif
+
+#ifndef ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
+static inline void flush_kernel_dcache_page(struct page *page)
+{
+}
+#endif
+
 #ifdef CONFIG_HIGHMEM
 
 #include <asm/highmem.h>
 
 /* declarations for linux/mm/highmem.c */
 unsigned int nr_free_highpages(void);
+extern unsigned long totalhigh_pages;
+#ifdef CONFIG_XEN
+void kmap_flush_unused(void);
+#endif
 
 #else /* CONFIG_HIGHMEM */
 
 static inline unsigned int nr_free_highpages(void) { return 0; }
+#ifdef CONFIG_XEN
+static inline void kmap_flush_unused(void) { }
+#endif
 
+#define totalhigh_pages 0
+
+#ifndef ARCH_HAS_KMAP
 static inline void *kmap(struct page *page)
 {
        might_sleep();
@@ -26,10 +48,12 @@ static inline void *kmap(struct page *page)
 
 #define kunmap(page) do { (void) (page); } while (0)
 
-#define kmap_atomic(page, idx)         page_address(page)
-#define kunmap_atomic(addr, idx)       do { } while (0)
-#define kmap_atomic_pfn(pfn, idx)      page_address(pfn_to_page(pfn))
+#define kmap_atomic(page, idx) \
+       ({ pagefault_disable(); page_address(page); })
+#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)
+#endif
 
 #endif /* CONFIG_HIGHMEM */
 
@@ -78,7 +102,10 @@ static inline void memclear_highpage_flush(struct page *page, unsigned int offse
        kunmap_atomic(kaddr, 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;
 
@@ -91,6 +118,8 @@ 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;