diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h
index 21cc6023ee..735cb4042a 100644
--- a/bsd-user/qemu.h
+++ b/bsd-user/qemu.h
@@ -211,8 +211,6 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
                        abi_ulong new_addr);
 int target_msync(abi_ulong start, abi_ulong len, int flags);
 extern unsigned long last_brk;
-void mmap_lock(void);
-void mmap_unlock(void);
 void cpu_list_lock(void);
 void cpu_list_unlock(void);
 #if defined(CONFIG_USE_NPTL)
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index 59544d4d89..05a5d5c53b 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -374,11 +374,17 @@ void tlb_fill(CPUState *cpu, target_ulong addr, int is_write, int mmu_idx,
 #endif
 
 #if defined(CONFIG_USER_ONLY)
+void mmap_lock(void);
+void mmap_unlock(void);
+
 static inline tb_page_addr_t get_page_addr_code(CPUArchState *env1, target_ulong addr)
 {
     return addr;
 }
 #else
+static inline void mmap_lock(void) {}
+static inline void mmap_unlock(void) {}
+
 /* cputlb.c */
 tb_page_addr_t get_page_addr_code(CPUArchState *env1, target_ulong addr);
 #endif
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 8012cc2f5b..e8606b290c 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -261,8 +261,6 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
 int target_msync(abi_ulong start, abi_ulong len, int flags);
 extern unsigned long last_brk;
 extern abi_ulong mmap_next_start;
-void mmap_lock(void);
-void mmap_unlock(void);
 abi_ulong mmap_find_vma(abi_ulong, abi_ulong);
 void cpu_list_lock(void);
 void cpu_list_unlock(void);
diff --git a/translate-all.c b/translate-all.c
index a12139ba01..e3c5c5e20a 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -466,11 +466,6 @@ static inline PageDesc *page_find(tb_page_addr_t index)
     return page_find_alloc(index, 0);
 }
 
-#if !defined(CONFIG_USER_ONLY)
-#define mmap_lock() do { } while (0)
-#define mmap_unlock() do { } while (0)
-#endif
-
 #if defined(CONFIG_USER_ONLY)
 /* Currently it is not recommended to allocate big chunks of data in
    user mode. It will change when a dedicated libc will be used.  */