Merge branch 'davinci-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[pandora-kernel.git] / arch / x86 / include / asm / fixmap.h

diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h
index 14f9890..635f03b 100644 (file)
--- a/arch/x86/include/asm/fixmap.h
+++ b/arch/x86/include/asm/fixmap.h
@@ -118,14 +118,20 @@ enum fixed_addresses {
         * 256 temporary boot-time mappings, used by early_ioremap(),
         * before ioremap() is functional.
         *
-        * We round it up to the next 256 pages boundary so that we
-        * can have a single pgd entry and a single pte table:
+        * If necessary we round it up to the next 256 pages boundary so
+        * that we can have a single pgd entry and a single pte table:
         */
 #define NR_FIX_BTMAPS          64
 #define FIX_BTMAPS_SLOTS       4
-       FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -
-                       (__end_of_permanent_fixed_addresses & 255),
-       FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1,
+#define TOTAL_FIX_BTMAPS       (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)
+       FIX_BTMAP_END =
+        (__end_of_permanent_fixed_addresses ^
+         (__end_of_permanent_fixed_addresses + TOTAL_FIX_BTMAPS - 1)) &
+        -PTRS_PER_PTE
+        ? __end_of_permanent_fixed_addresses + TOTAL_FIX_BTMAPS -
+          (__end_of_permanent_fixed_addresses & (TOTAL_FIX_BTMAPS - 1))
+        : __end_of_permanent_fixed_addresses,
+       FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
        FIX_OHCI1394_BASE,
 #endif