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-rw-r--r--linux/configfrag.ac5
1 files changed, 5 insertions, 0 deletions
diff --git a/linux/configfrag.ac b/linux/configfrag.ac
index db77fdc..f5af666 100644
--- a/linux/configfrag.ac
+++ b/linux/configfrag.ac
@@ -149,6 +149,11 @@ AC_Linux_DRIVER_qemu([ide],
[IDE disk controllers],
[CONFIG_BLK_DEV_IDE])
+AC_ARG_ENABLE([ide-forcedma],
+ AS_HELP_STRING([--enable-ide-forcedma], [enable forced use of DMA on IDE]),
+ [test x"$enableval" = xno ||
+ AC_DEFINE([CONFIG_BLK_DEV_FORCE_DMA], [1], [Force DMA on IDE block devices])])
+
dnl SCSI controllers.
AC_OPTION_Linux_group([scsi], [SCSI drivers])