Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/io_uring/syscall.c b/tools/io_uring/syscall.c
new file mode 100644
index 0000000..b22e0aa
--- /dev/null
+++ b/tools/io_uring/syscall.c
@@ -0,0 +1,52 @@
+/*
+ * Will go away once libc support is there
+ */
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <sys/uio.h>
+#include <signal.h>
+#include "liburing.h"
+
+#ifdef __alpha__
+/*
+ * alpha is the only exception, all other architectures
+ * have common numbers for new system calls.
+ */
+# ifndef __NR_io_uring_setup
+# define __NR_io_uring_setup 535
+# endif
+# ifndef __NR_io_uring_enter
+# define __NR_io_uring_enter 536
+# endif
+# ifndef __NR_io_uring_register
+# define __NR_io_uring_register 537
+# endif
+#else /* !__alpha__ */
+# ifndef __NR_io_uring_setup
+# define __NR_io_uring_setup 425
+# endif
+# ifndef __NR_io_uring_enter
+# define __NR_io_uring_enter 426
+# endif
+# ifndef __NR_io_uring_register
+# define __NR_io_uring_register 427
+# endif
+#endif
+
+int io_uring_register(int fd, unsigned int opcode, void *arg,
+ unsigned int nr_args)
+{
+ return syscall(__NR_io_uring_register, fd, opcode, arg, nr_args);
+}
+
+int io_uring_setup(unsigned int entries, struct io_uring_params *p)
+{
+ return syscall(__NR_io_uring_setup, entries, p);
+}
+
+int io_uring_enter(int fd, unsigned int to_submit, unsigned int min_complete,
+ unsigned int flags, sigset_t *sig)
+{
+ return syscall(__NR_io_uring_enter, fd, to_submit, min_complete,
+ flags, sig, _NSIG / 8);
+}