@@ -44,8 +44,7 @@ timeval of SO_TIMESTAMP (ms).
Supports multiple types of timestamp requests. As a result, this
socket option takes a bitmap of flags, not a boolean. In
- err = setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING, (void *) val,
- sizeof(val));
+ err = setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING, &val, sizeof(val));
val is an integer with any of the following bits set. Setting other
bit returns EINVAL and does not change the current state.
@@ -249,8 +248,7 @@ setsockopt to receive timestamps:
__u32 val = SOF_TIMESTAMPING_SOFTWARE |
SOF_TIMESTAMPING_OPT_ID /* or any other flag */;
- err = setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING, (void *) val,
- sizeof(val));
+ err = setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING, &val, sizeof(val));
1.4 Bytestream Timestamps
Passing (void*)val instead of &val would make a pointer out of an integer and cause sock_setsockopt to -EFAULT. See tools/testing/selftests/networking/timestamping/timestamping.c for a working example. Cc: David S. Miller <davem@davemloft.net> Cc: netdev@vger.kernel.org Signed-off-by: Ahmad Fatoum <ahmad@a3f.at> --- Documentation/networking/timestamping.txt | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)