util: Put qemu_vfree() in memalign.c

qemu_vfree() is the companion free function to qemu_memalign(); put
it in memalign.c so the allocation and free functions are together.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220226180723.1706285-9-peter.maydell@linaro.org
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

util/memalign.c

@@ -78,3 +78,14 @@ void *qemu_memalign(size_t alignment, size_t size)
             size, alignment, strerror(errno));
     abort();
 }
+
+void qemu_vfree(void *ptr)
+{
+    trace_qemu_vfree(ptr);
+#if !defined(CONFIG_POSIX_MEMALIGN) && defined(CONFIG_ALIGNED_MALLOC)
+    /* Only Windows _aligned_malloc needs a special free function */
+    _aligned_free(ptr);
+#else
+    free(ptr);
+#endif
+}

util/oslib-posix.c

@@ -220,12 +220,6 @@ void *qemu_anon_ram_alloc(size_t size, uint64_t *alignment, bool shared,
     return ptr;
 }
 
-void qemu_vfree(void *ptr)
-{
-    trace_qemu_vfree(ptr);
-    free(ptr);
-}
-
 void qemu_anon_ram_free(void *ptr, size_t size)
 {
     trace_qemu_anon_ram_free(ptr, size);

util/oslib-win32.c

@@ -75,12 +75,6 @@ void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared,
     return ptr;
 }
 
-void qemu_vfree(void *ptr)
-{
-    trace_qemu_vfree(ptr);
-    _aligned_free(ptr);
-}
-
 void qemu_anon_ram_free(void *ptr, size_t size)
 {
     trace_qemu_anon_ram_free(ptr, size);