osdep: introduce qemu_anon_ram_free to free qemu_anon_ram_alloc-ed memory

We switched from qemu_memalign to mmap() but then we don't modify
qemu_vfree() to do a munmap() over free().  Which we cannot do
because qemu_vfree() frees memory allocated by qemu_{mem,block}align.

Introduce a new function that does the munmap(), luckily the size is
available in the RAMBlock.

Reported-by: Amos Kong <akong@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Amos Kong <akong@redhat.com>
Message-id: 1368454796-14989-3-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 2 insertions, 6 deletions

diff --git a/exec.c b/exec.c
index 49344577ea..aec65c5063 100644
--- a/exec.c
+++ b/exec.c
@@ -1156,21 +1156,17 @@ void qemu_ram_free(ram_addr_t addr)
                     munmap(block->host, block->length);
                     close(block->fd);
                 } else {
-                    qemu_vfree(block->host);
+                    qemu_anon_ram_free(block->host, block->length);
                 }
 #else
                 abort();
 #endif
             } else {
-#if defined(TARGET_S390X) && defined(CONFIG_KVM)
-                munmap(block->host, block->length);
-#else
                 if (xen_enabled()) {
                     xen_invalidate_map_cache_entry(block->host);
                 } else {
-                    qemu_vfree(block->host);
+                    qemu_anon_ram_free(block->host, block->length);
                 }
-#endif
             }
             g_free(block);
             break;