Date: Wed, 7 Jul 2010 14:13:14 +0200 (CEST) From: Stefan Richter Subject: firewire: core: ensure some userspace API constants match corresponding kernel API constants The FW_ISO_ constants of the in-kernel API of firewire-core and FW_CDEV_ISO_ constants of the userspace API of firewire-core have nothing to do with each other --- except that the core-cdev.c implementation relies on them having the same values. Hence put some compile-time assertions into core-cdev.c. It's lame but I prefer it over including the userspace API header into the kernelspace API header and defining kernelspace API constants from userspace API constants. Nor do I want to expose the kernelspace constants in one of the two firewire headers that are exported to userland since this only concerns the core-cdev.c implementation. Signed-off-by: Stefan Richter --- drivers/firewire/core-cdev.c | 11 +++++++++++ 1 file changed, 11 insertions(+) Index: b/drivers/firewire/core-cdev.c =================================================================== --- a/drivers/firewire/core-cdev.c +++ b/drivers/firewire/core-cdev.c @@ -18,6 +18,7 @@ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include #include #include #include @@ -910,6 +911,9 @@ static int ioctl_create_iso_context(stru struct fw_cdev_create_iso_context *a = &arg->create_iso_context; struct fw_iso_context *context; + BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || + FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE); + if (a->channel > 63) return -EINVAL; @@ -1061,6 +1065,13 @@ static int ioctl_start_iso(struct client { struct fw_cdev_start_iso *a = &arg->start_iso; + BUILD_BUG_ON( + FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || + FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || + FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || + FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || + FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); + if (client->iso_context == NULL || a->handle != 0) return -EINVAL;