[PATCH v2 3/4] xen/public: s/unsigned long/xen_ulong_t

[Stefano Stabellini <stefano.stabellini@xxxxxxx>]

The goal is to use only fixed-size integers in public headers, such as
uint32_t and uint64_t.

However, there are cases where the ABI changes depending on the
architecture. In those cases, adding #ifdefs might be the clearest
solution but it is also cumbersome. We already define a xen_ulong_t type
which is widely used in public headers and it is defined differently by
architecture.

Instead of unsigned long, use xen_ulong_t in public headers:
- it makes it clearer that size might change by arch
- it gets us closer to the goal of no unfixed-size integers in public
headers

Note that unsigned long and xen_ulong_t are the same thing on x86 (both
32-bit and 64-bit) but they differ on all other arches. However, all
the interfaces with xen_ulong_t or unsigned long are x86-only interfaces
today. Thus, this patch doesn't introduce any ABI or semantic changes.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxx>
---
 xen/include/public/kexec.h   | 10 +++++-----
 xen/include/public/nmi.h     |  4 ++--
 xen/include/public/physdev.h |  2 +-
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/xen/include/public/kexec.h b/xen/include/public/kexec.h
index 8d2a0ef697..89164094d9 100644
--- a/xen/include/public/kexec.h
+++ b/xen/include/public/kexec.h
@@ -78,10 +78,10 @@
 
 typedef struct xen_kexec_image {
 #if defined(__i386__) || defined(__x86_64__)
-    unsigned long page_list[KEXEC_XEN_NO_PAGES];
+    xen_ulong_t page_list[KEXEC_XEN_NO_PAGES];
 #endif
-    unsigned long indirection_page;
-    unsigned long start_address;
+    xen_ulong_t indirection_page;
+    xen_ulong_t start_address;
 } xen_kexec_image_t;
 
 /*
@@ -145,8 +145,8 @@ typedef struct xen_kexec_load_v1 {
 typedef struct xen_kexec_range {
     int32_t range;
     int32_t nr;
-    unsigned long size;
-    unsigned long start;
+    xen_ulong_t size;
+    xen_ulong_t start;
 } xen_kexec_range_t;
 
 #if __XEN_INTERFACE_VERSION__ >= 0x00040400
diff --git a/xen/include/public/nmi.h b/xen/include/public/nmi.h
index 5900703f5f..c8c0ddafc2 100644
--- a/xen/include/public/nmi.h
+++ b/xen/include/public/nmi.h
@@ -43,8 +43,8 @@
  */
 #define XENNMI_register_callback   0
 struct xennmi_callback {
-    unsigned long handler_address;
-    unsigned long pad;
+    xen_ulong_t handler_address;
+    xen_ulong_t pad;
 };
 typedef struct xennmi_callback xennmi_callback_t;
 DEFINE_XEN_GUEST_HANDLE(xennmi_callback_t);
diff --git a/xen/include/public/physdev.h b/xen/include/public/physdev.h
index 03ccf86618..5bbb809fae 100644
--- a/xen/include/public/physdev.h
+++ b/xen/include/public/physdev.h
@@ -109,7 +109,7 @@ DEFINE_XEN_GUEST_HANDLE(physdev_set_iobitmap_t);
 #define PHYSDEVOP_apic_write             9
 struct physdev_apic {
     /* IN */
-    unsigned long apic_physbase;
+    xen_ulong_t apic_physbase;
     uint32_t reg;
     /* IN or OUT */
     uint32_t value;
-- 
2.25.1