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tools/io_uring: fix compile breakage 

It would seem none of the kernel continuous integration does this:
    $ cd tools/io_uring
    $ make

Otherwise it may have noticed:
   cc -Wall -Wextra -g -D_GNU_SOURCE   -c -o io_uring-bench.o
	 io_uring-bench.c
io_uring-bench.c:133:12: error: static declaration of ‘gettid’
	 follows non-static declaration
  133 | static int gettid(void)
      |            ^~~~~~
In file included from /usr/include/unistd.h:1170,
                 from io_uring-bench.c:27:
/usr/include/x86_64-linux-gnu/bits/unistd_ext.h:34:16: note:
	 previous declaration of ‘gettid’ was here
   34 | extern __pid_t gettid (void) __THROW;
      |                ^~~~~~
make: *** [<builtin>: io_uring-bench.o] Error 1

The problem on Ubuntu 20.04 (with lk 5.9.0-rc5) is that unistd.h
already defines gettid(). So prefix the local definition with
"lk_".

Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Douglas Gilbert 2020-09-14 17:36:09 -04:00 committed by Jens Axboe
parent f5cac8b156
commit 72f04da48a
1 changed files with 2 additions and 2 deletions
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4
tools/io_uring/io_uring-bench.c
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@ -130,7 +130,7 @@ static int io_uring_register_files(struct submitter *s)
s->nr_files);
}
static int gettid(void)
static int lk_gettid(void)
{
return syscall(__NR_gettid);
}
@ -281,7 +281,7 @@ static void *submitter_fn(void *data)
struct io_sq_ring *ring = &s->sq_ring;
int ret, prepped;
printf("submitter=%d\n", gettid());
printf("submitter=%d\n", lk_gettid());
srand48_r(pthread_self(), &s->rand);