[PULL,01/14] userfaultfd: use 1ULL to build ioctl masks

Commit Message

Peter Xu Jan. 29, 2024, 3:03 a.m. UTC

From: Paolo Bonzini <[e-mail]>

There is no need to use the Linux-internal __u64 type, 1ULL is
guaranteed to be wide enough.

Signed-off-by: Paolo Bonzini <[e-mail]>
Reviewed-by: Philippe Mathieu-Daudé <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Peter Xu <[e-mail]>
---
 migration/postcopy-ram.c                  | 16 +++++++---------
 subprojects/libvhost-user/libvhost-user.c |  2 +-
 tests/qtest/migration-test.c              |  4 ++--
 3 files changed, 10 insertions(+), 12 deletions(-)

Patch

diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
index 5408e028c6..893ec8fa89 100644
--- a/migration/postcopy-ram.c
+++ b/migration/postcopy-ram.c
@@ -102,11 +102,9 @@  void postcopy_thread_create(MigrationIncomingState *mis,
  * are target OS specific.
  */
 #if defined(__linux__)
-
 #include <poll.h>
 #include <sys/ioctl.h>
 #include <sys/syscall.h>
-#include <asm/types.h> /* for __u64 */
 #endif
 
 #if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD)
@@ -272,8 +270,8 @@  static bool request_ufd_features(int ufd, uint64_t features)
         return false;
     }
 
-    ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
-                 (__u64)1 << _UFFDIO_UNREGISTER;
+    ioctl_mask = 1ULL << _UFFDIO_REGISTER |
+                 1ULL << _UFFDIO_UNREGISTER;
     if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
         error_report("Missing userfault features: %" PRIx64,
                      (uint64_t)(~api_struct.ioctls & ioctl_mask));
@@ -462,9 +460,9 @@  bool postcopy_ram_supported_by_host(MigrationIncomingState *mis, Error **errp)
         goto out;
     }
 
-    feature_mask = (__u64)1 << _UFFDIO_WAKE |
-                   (__u64)1 << _UFFDIO_COPY |
-                   (__u64)1 << _UFFDIO_ZEROPAGE;
+    feature_mask = 1ULL << _UFFDIO_WAKE |
+                   1ULL << _UFFDIO_COPY |
+                   1ULL << _UFFDIO_ZEROPAGE;
     if ((reg_struct.ioctls & feature_mask) != feature_mask) {
         error_setg(errp, "Missing userfault map features: %" PRIx64,
                    (uint64_t)(~reg_struct.ioctls & feature_mask));
@@ -733,11 +731,11 @@  static int ram_block_enable_notify(RAMBlock *rb, void *opaque)
         error_report("%s userfault register: %s", __func__, strerror(errno));
         return -1;
     }
-    if (!(reg_struct.ioctls & ((__u64)1 << _UFFDIO_COPY))) {
+    if (!(reg_struct.ioctls & (1ULL << _UFFDIO_COPY))) {
         error_report("%s userfault: Region doesn't support COPY", __func__);
         return -1;
     }
-    if (reg_struct.ioctls & ((__u64)1 << _UFFDIO_ZEROPAGE)) {
+    if (reg_struct.ioctls & (1ULL << _UFFDIO_ZEROPAGE)) {
         qemu_ram_set_uf_zeroable(rb);
     }
 
diff --git a/subprojects/libvhost-user/libvhost-user.c b/subprojects/libvhost-user/libvhost-user.c
index 6684057370..a3b158c671 100644
--- a/subprojects/libvhost-user/libvhost-user.c
+++ b/subprojects/libvhost-user/libvhost-user.c
@@ -684,7 +684,7 @@  generate_faults(VuDev *dev) {
                      dev->postcopy_ufd, strerror(errno));
             return false;
         }
-        if (!(reg_struct.ioctls & ((__u64)1 << _UFFDIO_COPY))) {
+        if (!(reg_struct.ioctls & (1ULL << _UFFDIO_COPY))) {
             vu_panic(dev, "%s Region (%d) doesn't support COPY",
                      __func__, i);
             return false;
diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c
index d3066e119f..7675519cfa 100644
--- a/tests/qtest/migration-test.c
+++ b/tests/qtest/migration-test.c
@@ -104,8 +104,8 @@  static bool ufd_version_check(void)
     }
     uffd_feature_thread_id = api_struct.features & UFFD_FEATURE_THREAD_ID;
 
-    ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
-                 (__u64)1 << _UFFDIO_UNREGISTER;
+    ioctl_mask = 1ULL << _UFFDIO_REGISTER |
+                 1ULL << _UFFDIO_UNREGISTER;
     if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
         g_test_message("Skipping test: Missing userfault feature");
         return false;