Update to 3.4-final.

[linux-flexiantxendom0-3.2.10.git] / mm / highmem.c

diff --git a/mm/highmem.c b/mm/highmem.c
index 781e754..57d82c6 100644 (file)
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -17,7 +17,7 @@
  */
 
 #include <linux/mm.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/swap.h>
 #include <linux/bio.h>
 #include <linux/pagemap.h>
@@ -29,6 +29,11 @@
 #include <linux/kgdb.h>
 #include <asm/tlbflush.h>
 
+
+#if defined(CONFIG_HIGHMEM) || defined(CONFIG_X86_32)
+DEFINE_PER_CPU(int, __kmap_atomic_idx);
+#endif
+
 /*
  * Virtual_count is not a pure "count".
  *  0 means that it is not mapped, and has not been mapped
@@ -43,7 +48,6 @@ unsigned long totalhigh_pages __read_mostly;
 EXPORT_SYMBOL(totalhigh_pages);
 
 
-DEFINE_PER_CPU(int, __kmap_atomic_idx);
 EXPORT_PER_CPU_SYMBOL(__kmap_atomic_idx);
 
 unsigned int nr_free_highpages (void)
@@ -246,7 +250,7 @@ void *kmap_high_get(struct page *page)
 #endif
 
 /**
- * kunmap_high - map a highmem page into memory
+ * kunmap_high - unmap a highmem page into memory
  * @page: &struct page to unmap
  *
  * If ARCH_NEEDS_KMAP_HIGH_GET is not defined then this may be called
@@ -322,7 +326,7 @@ static struct page_address_slot {
        spinlock_t lock;                        /* Protect this bucket's list */
 } ____cacheline_aligned_in_smp page_address_htable[1<<PA_HASH_ORDER];
 
-static struct page_address_slot *page_slot(struct page *page)
+static struct page_address_slot *page_slot(const struct page *page)
 {
        return &page_address_htable[hash_ptr(page, PA_HASH_ORDER)];
 }
@@ -333,7 +337,7 @@ static struct page_address_slot *page_slot(struct page *page)
  *
  * Returns the page's virtual address.
  */
-void *page_address(struct page *page)
+void *page_address(const struct page *page)
 {
        unsigned long flags;
        void *ret;