Replace qemu_real_host_page variables with inlined functions

Replace the global variables with inlined helper functions. getpagesize() is very
likely annotated with a "const" function attribute (at least with glibc), and thus
optimization should apply even better.

This avoids the need for a constructor initialization too.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220323155743.1585078-12-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/util/mmap-alloc.c b/util/mmap-alloc.c
index 893d864354..5b90cb68ea 100644
--- a/util/mmap-alloc.c
+++ b/util/mmap-alloc.c
@@ -50,7 +50,7 @@ size_t qemu_fd_getpagesize(int fd)
 #endif
 #endif
 
-    return qemu_real_host_page_size;
+    return qemu_real_host_page_size();
 }
 
 size_t qemu_mempath_getpagesize(const char *mem_path)
@@ -81,7 +81,7 @@ size_t qemu_mempath_getpagesize(const char *mem_path)
 #endif
 #endif
 
-    return qemu_real_host_page_size;
+    return qemu_real_host_page_size();
 }
 
 #define OVERCOMMIT_MEMORY_PATH "/proc/sys/vm/overcommit_memory"
@@ -101,7 +101,7 @@ static bool map_noreserve_effective(int fd, uint32_t qemu_map_flags)
      *    MAP_NORESERVE.
      * b) MAP_NORESERVE is not affected by /proc/sys/vm/overcommit_memory.
      */
-    if (qemu_fd_getpagesize(fd) != qemu_real_host_page_size) {
+    if (qemu_fd_getpagesize(fd) != qemu_real_host_page_size()) {
         return true;
     }
 
@@ -166,7 +166,7 @@ static void *mmap_reserve(size_t size, int fd)
      * We do this unless we are using the system page size, in which case
      * anonymous memory is OK.
      */
-    if (fd == -1 || qemu_fd_getpagesize(fd) == qemu_real_host_page_size) {
+    if (fd == -1 || qemu_fd_getpagesize(fd) == qemu_real_host_page_size()) {
         fd = -1;
         flags |= MAP_ANONYMOUS;
     } else {
@@ -243,7 +243,7 @@ static inline size_t mmap_guard_pagesize(int fd)
     /* Mappings in the same segment must share the same page size */
     return qemu_fd_getpagesize(fd);
 #else
-    return qemu_real_host_page_size;
+    return qemu_real_host_page_size();
 #endif
 }