patch-2.2.18 linux/include/asm-s390/page.h

• Lines: 28
• Date: Sun Sep 3 00:06:05 2000
• Orig file: v2.2.17/include/asm-s390/page.h
• Orig date: Fri Apr 21 12:46:49 2000

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/include/asm-s390/page.h linux/include/asm-s390/page.h
@@ -26,6 +26,19 @@
 #define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
 #define copy_page(to,from)      memcpy((void *)(to), (void *)(from), PAGE_SIZE)
 
+extern __inline__ int get_order(unsigned long size)
+{
+        int order;
+
+        size = (size-1) >> (PAGE_SHIFT-1);
+        order = -1;
+        do {
+                size >>= 1;
+                order++;
+        } while (size);
+        return order;
+}
+
 #ifdef STRICT_MM_TYPECHECKS
 /*
  * These are used to make use of C type-checking..
@@ -90,6 +103,7 @@
 #define __pa(x)                 ((unsigned long)(x)-PAGE_OFFSET)
 #define __va(x)                 ((void *)((unsigned long)(x)+PAGE_OFFSET))
 #define MAP_NR(addr)            (__pa(addr) >> PAGE_SHIFT)
+
 
 #endif                                 /* __KERNEL__                       */