Module: xenomai-3
Branch: next
Commit: 7cc5c68c085d017183e4d6d91cfa9a59f025b0e6
URL:
http://git.xenomai.org/?p=xenomai-3.git;a=commit;h=7cc5c68c085d017183e4d6d91cfa9a59f025b0e6
Author: Philippe Gerum <r...@xenomai.org>
Date: Tue May 3 12:16:29 2016 +0200
cobalt/rtdm: zero-init the private context area
---
include/cobalt/kernel/rtdm/driver.h | 9 ++++++++-
kernel/cobalt/rtdm/core.c | 2 +-
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/include/cobalt/kernel/rtdm/driver.h
b/include/cobalt/kernel/rtdm/driver.h
index edd92ee..1354d9a 100644
--- a/include/cobalt/kernel/rtdm/driver.h
+++ b/include/cobalt/kernel/rtdm/driver.h
@@ -258,7 +258,14 @@ struct rtdm_driver {
* @anchor rtdm_driver_flags
*/
int device_flags;
- /** Size of driver defined appendix to struct rtdm_dev_context */
+ /**
+ * Size of the private memory area the core should
+ * automatically allocate for each open file descriptor, which
+ * is usable for storing the context data associated to each
+ * connection. The allocated memory is zero-initialized. The
+ * start of this area can be retrieved by a call to
+ * rtdm_fd_to_private().
+ */
size_t context_size;
/** Protocol device identification: protocol family (PF_xxx) */
int protocol_family;
diff --git a/kernel/cobalt/rtdm/core.c b/kernel/cobalt/rtdm/core.c
index 0f68e77..05f273f 100644
--- a/kernel/cobalt/rtdm/core.c
+++ b/kernel/cobalt/rtdm/core.c
@@ -86,7 +86,7 @@ static int create_instance(int ufd, struct rtdm_device *dev,
atomic_read(&dev->refcount) > 1)
return -EBUSY;
- context = kmalloc(sizeof(struct rtdm_dev_context) +
+ context = kzalloc(sizeof(struct rtdm_dev_context) +
drv->context_size, GFP_KERNEL);
if (unlikely(context == NULL))
return -ENOMEM;
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