Add kmap for highmem access

[yaffs2.git] / yaffs_fs.c

diff --git a/yaffs_fs.c b/yaffs_fs.c
index b8f2575e7e52a77e702969b986626e58d144ab4f..2672c454f105e3bb7f6238da68ad57e63d542def 100644 (file)
--- a/yaffs_fs.c
+++ b/yaffs_fs.c
@@ -32,7 +32,7 @@
  */
 
 const char *yaffs_fs_c_version =
-    "$Id: yaffs_fs.c,v 1.67 2008-07-03 20:06:05 charles Exp $";
+    "$Id: yaffs_fs.c,v 1.69 2008-08-28 02:42:11 charles Exp $";
 extern const char *yaffs_guts_c_version;
 
 #include <linux/version.h>
@@ -77,6 +77,12 @@ extern const char *yaffs_guts_c_version;
 
 #endif
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26))
+#define YPROC_ROOT  &proc_root
+#else
+#define YPROC_ROOT  NULL
+#endif
+
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
 #define WRITE_SIZE_STR "writesize"
 #define WRITE_SIZE(mtd) (mtd)->writesize
@@ -196,7 +202,10 @@ static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf);
 static int yaffs_statfs(struct super_block *sb, struct statfs *buf);
 #endif
 
+#ifdef YAFFS_HAS_PUT_INODE
 static void yaffs_put_inode(struct inode *inode);
+#endif
+
 static void yaffs_delete_inode(struct inode *);
 static void yaffs_clear_inode(struct inode *);
 
@@ -301,7 +310,9 @@ static struct super_operations yaffs_super_ops = {
 #ifndef YAFFS_USE_OWN_IGET
        .read_inode = yaffs_read_inode,
 #endif
+#ifdef YAFFS_HAS_PUT_INODE
        .put_inode = yaffs_put_inode,
+#endif
        .put_super = yaffs_put_super,
        .delete_inode = yaffs_delete_inode,
        .clear_inode = yaffs_clear_inode,
@@ -445,6 +456,9 @@ static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry)
 
 }
 
+
+#ifdef YAFFS_HAS_PUT_INODE
+
 /* For now put inode is just for debugging
  * Put inode is called when the inode **structure** is put.
  */
@@ -455,6 +469,7 @@ static void yaffs_put_inode(struct inode *inode)
           atomic_read(&inode->i_count)));
 
 }
+#endif
 
 /* clear is called to tell the fs to release any per-inode data it holds */
 static void yaffs_clear_inode(struct inode *inode)
@@ -699,13 +714,17 @@ static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
                              unsigned to)
 {
 
-       void *addr = page_address(pg) + offset;
+       void *addr, *kva;
+       
        loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset;
        int nBytes = to - offset;
        int nWritten;
 
        unsigned spos = pos;
        unsigned saddr = (unsigned)addr;
+       
+       kva=kmap(pg);
+       addr = kva + offset;
 
        T(YAFFS_TRACE_OS,
          (KERN_DEBUG "yaffs_commit_write addr %x pos %x nBytes %d\n", saddr,
@@ -724,6 +743,8 @@ static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
                SetPageUptodate(pg);
        }
 
+       kunmap(pg);
+
        T(YAFFS_TRACE_OS,
          (KERN_DEBUG "yaffs_commit_write returning %d\n",
           nWritten == nBytes ? 0 : nWritten));
@@ -2304,7 +2325,7 @@ static int __init init_yaffs_fs(void)
        /* Install the proc_fs entry */
        my_proc_entry = create_proc_entry("yaffs",
                                               S_IRUGO | S_IFREG,
-                                              &proc_root);
+                                              YPROC_ROOT);
 
        if (my_proc_entry) {
                my_proc_entry->write_proc = yaffs_proc_write;
@@ -2350,7 +2371,7 @@ static void __exit exit_yaffs_fs(void)
        T(YAFFS_TRACE_ALWAYS, ("yaffs " __DATE__ " " __TIME__
                               " removing. \n"));
 
-       remove_proc_entry("yaffs", &proc_root);
+       remove_proc_entry("yaffs", YPROC_ROOT);
 
        fsinst = fs_to_install;