orangefs: fix do_readv_writev() handling of error halfway through

[linux-2.6-block.git] / block / Kconfig

diff --git a/block/Kconfig b/block/Kconfig
index 161491d0a879ed11ce2276a1923a60bc1d92479e..0363cd731320d8d9d93cdcd8e3fb5351682e6464 100644 (file)
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -88,6 +88,19 @@ config BLK_DEV_INTEGRITY
        T10/SCSI Data Integrity Field or the T13/ATA External Path
        Protection.  If in doubt, say N.
 
+config BLK_DEV_DAX
+       bool "Block device DAX support"
+       depends on FS_DAX
+       depends on BROKEN
+       help
+         When DAX support is available (CONFIG_FS_DAX) raw block
+         devices can also support direct userspace access to the
+         storage capacity via MMAP(2) similar to a file on a
+         DAX-enabled filesystem.  However, the DAX I/O-path disables
+         some standard I/O-statistics, and the MMAP(2) path has some
+         operational differences due to bypassing the page
+         cache.  If in doubt, say N.
+
 config BLK_DEV_THROTTLING
        bool "Block layer bio throttling support"
        depends on BLK_CGROUP=y