X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=mm%2Fhighmem.c;h=e16e1523b688680572513b16ef0e49d5ac0314f0;hb=4611a771fc8e5ad77d27f25268846abb425101a0;hp=35d47733cde43af70c61a996c78ef54ca5e20e02;hpb=d870ec7281d8429ab17d2e0324f4d8ca3f3de62d;p=linux-2.6-omap-h63xx.git

diff --git a/mm/highmem.c b/mm/highmem.c
index 35d47733cde..e16e1523b68 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -40,6 +40,7 @@
 #ifdef CONFIG_HIGHMEM
 
 unsigned long totalhigh_pages __read_mostly;
+EXPORT_SYMBOL(totalhigh_pages);
 
 unsigned int nr_free_highpages (void)
 {
@@ -104,8 +105,9 @@ static void flush_all_zero_pkmaps(void)
 	flush_tlb_kernel_range(PKMAP_ADDR(0), PKMAP_ADDR(LAST_PKMAP));
 }
 
-/* Flush all unused kmap mappings in order to remove stray
-   mappings. */
+/**
+ * kmap_flush_unused - flush all unused kmap mappings in order to remove stray mappings
+ */
 void kmap_flush_unused(void)
 {
 	spin_lock(&kmap_lock);
@@ -163,6 +165,14 @@ start:
 	return vaddr;
 }
 
+/**
+ * kmap_high - map a highmem page into memory
+ * @page: &struct page to map
+ *
+ * Returns the page's virtual memory address.
+ *
+ * We cannot call this from interrupts, as it may block.
+ */
 void *kmap_high(struct page *page)
 {
 	unsigned long vaddr;
@@ -170,8 +180,6 @@ void *kmap_high(struct page *page)
 	/*
 	 * For highmem pages, we can't trust "virtual" until
 	 * after we have the lock.
-	 *
-	 * We cannot call this from interrupts, as it may block
 	 */
 	spin_lock(&kmap_lock);
 	vaddr = (unsigned long)page_address(page);
@@ -185,6 +193,10 @@ void *kmap_high(struct page *page)
 
 EXPORT_SYMBOL(kmap_high);
 
+/**
+ * kunmap_high - map a highmem page into memory
+ * @page: &struct page to unmap
+ */
 void kunmap_high(struct page *page)
 {
 	unsigned long vaddr;
@@ -259,6 +271,12 @@ static struct page_address_slot *page_slot(struct page *page)
 	return &page_address_htable[hash_ptr(page, PA_HASH_ORDER)];
 }
 
+/**
+ * page_address - get the mapped virtual address of a page
+ * @page: &struct page to get the virtual address of
+ *
+ * Returns the page's virtual address.
+ */
 void *page_address(struct page *page)
 {
 	unsigned long flags;
@@ -288,6 +306,11 @@ done:
 
 EXPORT_SYMBOL(page_address);
 
+/**
+ * set_page_address - set a page's virtual address
+ * @page: &struct page to set
+ * @virtual: virtual address to use
+ */
 void set_page_address(struct page *page, void *virtual)
 {
 	unsigned long flags;