logfs: handle powerfail on NAND flash

[sfrench/cifs-2.6.git] / fs / logfs / dev_bdev.c

diff --git a/fs/logfs/dev_bdev.c b/fs/logfs/dev_bdev.c
index a5d0c56d3ebc925b44d8d6a3a1bf0e8765d603ad..9bd2ce2a30407897557b32a2fa9f97708695593e 100644 (file)
--- a/fs/logfs/dev_bdev.c
+++ b/fs/logfs/dev_bdev.c
@@ -9,6 +9,7 @@
 #include <linux/bio.h>
 #include <linux/blkdev.h>
 #include <linux/buffer_head.h>
+#include <linux/gfp.h>
 
 #define PAGE_OFS(ofs) ((ofs) & (PAGE_SIZE-1))
 
@@ -302,6 +303,11 @@ static void bdev_put_device(struct super_block *sb)
        close_bdev_exclusive(logfs_super(sb)->s_bdev, FMODE_READ|FMODE_WRITE);
 }
 
+static int bdev_can_write_buf(struct super_block *sb, u64 ofs)
+{
+       return 0;
+}
+
 static const struct logfs_device_ops bd_devops = {
        .find_first_sb  = bdev_find_first_sb,
        .find_last_sb   = bdev_find_last_sb,
@@ -309,6 +315,7 @@ static const struct logfs_device_ops bd_devops = {
        .readpage       = bdev_readpage,
        .writeseg       = bdev_writeseg,
        .erase          = bdev_erase,
+       .can_write_buf  = bdev_can_write_buf,
        .sync           = bdev_sync,
        .put_device     = bdev_put_device,
 };