[PATCH] Xenctrl.domain_setmaxmem: fix 32-bit truncation bug

[Edwin Török <edwin.torok@xxxxxxxxxx>]

Observed when attempting to boot a >4TiB VM:

After a call to domain_setmaxmem with 6370254848 (KiB),
the domain's maxmem got set to 2075287552,
which is exactly 2^32 smaller.

xc_domain_setmaxmem takes an uint64_t as a parameter,
and the OCaml value is 64-bit already, so fix the C variable
to match the type and avoid the truncation.

Signed-off-by: Edwin Török <edwin.torok@xxxxxxxxxx>
---
 tools/ocaml/libs/xc/xenctrl_stubs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/ocaml/libs/xc/xenctrl_stubs.c 
b/tools/ocaml/libs/xc/xenctrl_stubs.c
index ac2a7537d6..c55f73b265 100644
--- a/tools/ocaml/libs/xc/xenctrl_stubs.c
+++ b/tools/ocaml/libs/xc/xenctrl_stubs.c
@@ -947,7 +947,7 @@ CAMLprim value stub_xc_domain_setmaxmem(value xch_val, 
value domid,
        int retval;
 
        uint32_t c_domid = Int_val(domid);
-       unsigned int c_max_memkb = Int64_val(max_memkb);
+       uint64_t c_max_memkb = Int64_val(max_memkb);
        caml_enter_blocking_section();
        retval = xc_domain_setmaxmem(xch, c_domid, c_max_memkb);
        caml_leave_blocking_section();
-- 
2.47.3