V4L/DVB (4806): Saa7134: add support for Hauppauge WinTV-HVR1110 DVB-T/Hybrid

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

diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 85ce7ef..3d8768b 100644 (file)
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -3,6 +3,7 @@
 
 #include <linux/fs.h>
 #include <linux/mm.h>
+#include <linux/uaccess.h>
 
 #include <asm/cacheflush.h>
 
@@ -24,11 +25,15 @@ static inline void flush_kernel_dcache_page(struct page *page)
 
 /* declarations for linux/mm/highmem.c */
 unsigned int nr_free_highpages(void);
+extern unsigned long totalhigh_pages;
 
 #else /* CONFIG_HIGHMEM */
 
 static inline unsigned int nr_free_highpages(void) { return 0; }
 
+#define totalhigh_pages 0
+
+#ifndef ARCH_HAS_KMAP
 static inline void *kmap(struct page *page)
 {
        might_sleep();
@@ -37,10 +42,12 @@ 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 */