io_uring_enter: don't expose sigset_size argument

Applications should not need to care about this, we can pass it in
ourselves. Once the libc support is there, we won't expose this
parameter either.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

src/liburing.h

@@ -47,7 +47,7 @@ struct io_uring {
  */
 extern int io_uring_setup(unsigned entries, struct io_uring_params *p);
 extern int io_uring_enter(unsigned fd, unsigned to_submit,
-	unsigned min_complete, unsigned flags, sigset_t *sig, size_t sigsz);
+	unsigned min_complete, unsigned flags, sigset_t *sig);
 extern int io_uring_register(int fd, unsigned int opcode, void *arg,
 	unsigned int nr_args);
 

src/queue.c

@@ -29,7 +29,7 @@ static int __io_uring_get_completion(struct io_uring *ring,
 		if (!wait)
 			break;
 		ret = io_uring_enter(ring->ring_fd, 0, 1,
-					IORING_ENTER_GETEVENTS, NULL, _NSIG / 8);
+					IORING_ENTER_GETEVENTS, NULL);
 		if (ret < 0)
 			return -errno;
 	} while (1);
@@ -112,7 +112,7 @@ int io_uring_submit(struct io_uring *ring)
 
 submit:
 	return io_uring_enter(ring->ring_fd, submitted, 0,
-				IORING_ENTER_GETEVENTS, NULL, _NSIG / 8);
+				IORING_ENTER_GETEVENTS, NULL);
 }
 
 /*

src/syscall.c

@@ -4,6 +4,7 @@
 #include <unistd.h>
 #include <sys/syscall.h>
 #include <sys/uio.h>
+#include <signal.h>
 #include "compat.h"
 #include "io_uring.h"
 
@@ -33,8 +34,8 @@ int io_uring_setup(unsigned int entries, struct io_uring_params *p)
 }
 
 int io_uring_enter(int fd, unsigned int to_submit, unsigned int min_complete,
-		   unsigned int flags, sigset_t *sig, size_t sigsz)
+		   unsigned int flags, sigset_t *sig)
 {
 	return syscall(__NR_sys_io_uring_enter, fd, to_submit, min_complete,
-			flags, sig, sigsz);
+			flags, sig, _NSIG / 8);
 }