From: Liang Zhen <liang.z...@intel.com>

Fail to compile if largest LNet user land data structures passed
to kernel are larger than LIBCFS_IOC_DATA_MAX

Signed-off-by: Liang Zhen <liang.z...@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5435
Reviewed-on: http://review.whamcloud.com/11313
Reviewed-by: Bobi Jam <bobi...@gmail.com>
Reviewed-by: Johann Lombardi <johann.lomba...@intel.com>
Reviewed-by: Oleg Drokin <oleg.dro...@intel.com>
---
 drivers/staging/lustre/lnet/lnet/api-ni.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/lustre/lnet/lnet/api-ni.c 
b/drivers/staging/lustre/lnet/lnet/api-ni.c
index 8764755..f825784 100644
--- a/drivers/staging/lustre/lnet/lnet/api-ni.c
+++ b/drivers/staging/lustre/lnet/lnet/api-ni.c
@@ -1864,6 +1864,10 @@ LNetCtl(unsigned int cmd, void *arg)
        int rc;
        unsigned long secs_passed;
 
+       BUILD_BUG_ON(LIBCFS_IOC_DATA_MAX <
+                    sizeof(struct lnet_ioctl_net_config) +
+                    sizeof(struct lnet_ioctl_config_data));
+
        switch (cmd) {
        case IOC_LIBCFS_GET_NI:
                rc = LNetGetId(data->ioc_count, &id);
-- 
1.7.1

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