AcoSail/kernel_optimize_test
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net/dccp/timer.c: use 'u64' instead of 's64' to avoid compiler's warning

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'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 ‘dccp_timestamp’:
  net/dccp/timer.c:285: warning: comparison of distinct pointer types lacks a cast

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Chen Gang 2014-05-21 08:19:34 +08:00 committed by David S. Miller
parent 53819a6ced
commit 5c4a43b024
1 changed files with 1 additions and 1 deletions
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net/dccp/timer.c
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@ -280,7 +280,7 @@ static ktime_t dccp_timestamp_seed;
*/
u32 dccp_timestamp(void)
{
s64 delta = ktime_us_delta(ktime_get_real(), dccp_timestamp_seed);
u64 delta = (u64)ktime_us_delta(ktime_get_real(), dccp_timestamp_seed);
do_div(delta, 10);
return delta;