[PATCH] ipc: supress warning on cast of ipc_port_t to name

[Milos Nikic]

This patch fixes a warning when building on 64-bit architectures where
sizeof(void *) > sizeof(mach_port_name_t).

The double cast (via uintptr_t) explicitly tells the compiler that the
truncation of the pointer value into the 32-bit port name is intentional,
preserving the existing behavior while silencing the warning.
---
 ipc/ipc_port.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ipc/ipc_port.c b/ipc/ipc_port.c
index e959f67..884a4f4 100644
--- a/ipc/ipc_port.c
+++ b/ipc/ipc_port.c
@@ -35,6 +35,7 @@
  */
 
 #include <kern/printf.h>
+#include <stdint.h>
 #include <string.h>
 
 #include <mach/port.h>
@@ -1177,6 +1178,7 @@ ipc_port_t
 ipc_port_alloc_special(ipc_space_t space)
 {
        ipc_port_t port;
+       mach_port_name_t name;
 
        port = ip_alloc();
        if (port == IP_NULL)
@@ -1197,7 +1199,8 @@ ipc_port_alloc_special(ipc_space_t space)
         *      the fast rpc path).
         */
 
-       ipc_port_init(port, space, (mach_port_name_t)port);
+       name = (mach_port_name_t)(uintptr_t) port;
+       ipc_port_init(port, space, name);
 
        return port;
 }
-- 
2.52.0