From: Chen Gang Date: Wed, 21 May 2014 00:19:34 +0000 Subject: [PATCH linux-next] net/dccp/timer.c: use 'u64' instead of 's64' to avoid compiler's warning Message-Id: <537BF116.9000900@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: quoted-printable To: dccp@vger.kernel.org 'dccp_timestamp_seed' is initialized once by ktime_get_real() in dccp_timestamping_init(). It is always less than ktime_get_real() in dccp_timestamp(). Then, ktime_us_delta() in dccp_timestamp() will always return positive number. So can use manual type cast to let compiler and do_div() know about it to avoid warning. The related warning (with allmodconfig under unicore32): CC [M] net/dccp/timer.o net/dccp/timer.c: In function =91dccp_timestamp=92: net/dccp/timer.c:285: warning: comparison of distinct pointer types lacks= a cast Signed-off-by: Chen Gang --- net/dccp/timer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/dccp/timer.c b/net/dccp/timer.c index 16f0b22..1cd46a3 100644 --- a/net/dccp/timer.c +++ b/net/dccp/timer.c @@ -280,7 +280,7 @@ static ktime_t dccp_timestamp_seed; */ u32 dccp_timestamp(void) { - s64 delta =3D ktime_us_delta(ktime_get_real(), dccp_timestamp_seed); + u64 delta =3D (u64)ktime_us_delta(ktime_get_real(), dccp_timestamp_seed); =20 do_div(delta, 10); return delta; --=20 1.9.2.459.g68773ac