diff --git a/Misc/NEWS.d/next/Core and Builtins/2022-05-24-14-35-48.gh-issue-93040.9X6Ofu.rst b/Misc/NEWS.d/next/Core and Builtins/2022-05-24-14-35-48.gh-issue-93040.9X6Ofu.rst
new file mode 100644
index 00000000000..b2e527446ea
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2022-05-24-14-35-48.gh-issue-93040.9X6Ofu.rst	
@@ -0,0 +1 @@
+Wraps unused parameters in ``Objects/obmalloc.c`` with ``Py_UNUSED``.
diff --git a/Objects/obmalloc.c b/Objects/obmalloc.c
index 823855ca6d8..78a6f01a096 100644
--- a/Objects/obmalloc.c
+++ b/Objects/obmalloc.c
@@ -90,7 +90,7 @@ struct _PyTraceMalloc_Config _Py_tracemalloc_config = _PyTraceMalloc_Config_INIT
 
 
 static void *
-_PyMem_RawMalloc(void *ctx, size_t size)
+_PyMem_RawMalloc(void *Py_UNUSED(ctx), size_t size)
 {
     /* PyMem_RawMalloc(0) means malloc(1). Some systems would return NULL
        for malloc(0), which would be treated as an error. Some platforms would
@@ -102,7 +102,7 @@ _PyMem_RawMalloc(void *ctx, size_t size)
 }
 
 static void *
-_PyMem_RawCalloc(void *ctx, size_t nelem, size_t elsize)
+_PyMem_RawCalloc(void *Py_UNUSED(ctx), size_t nelem, size_t elsize)
 {
     /* PyMem_RawCalloc(0, 0) means calloc(1, 1). Some systems would return NULL
        for calloc(0, 0), which would be treated as an error. Some platforms
@@ -116,7 +116,7 @@ _PyMem_RawCalloc(void *ctx, size_t nelem, size_t elsize)
 }
 
 static void *
-_PyMem_RawRealloc(void *ctx, void *ptr, size_t size)
+_PyMem_RawRealloc(void *Py_UNUSED(ctx), void *ptr, size_t size)
 {
     if (size == 0)
         size = 1;
@@ -124,7 +124,7 @@ _PyMem_RawRealloc(void *ctx, void *ptr, size_t size)
 }
 
 static void
-_PyMem_RawFree(void *ctx, void *ptr)
+_PyMem_RawFree(void *Py_UNUSED(ctx), void *ptr)
 {
     free(ptr);
 }
@@ -132,21 +132,22 @@ _PyMem_RawFree(void *ctx, void *ptr)
 
 #ifdef MS_WINDOWS
 static void *
-_PyObject_ArenaVirtualAlloc(void *ctx, size_t size)
+_PyObject_ArenaVirtualAlloc(void *Py_UNUSED(ctx), size_t size)
 {
     return VirtualAlloc(NULL, size,
                         MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
 }
 
 static void
-_PyObject_ArenaVirtualFree(void *ctx, void *ptr, size_t size)
+_PyObject_ArenaVirtualFree(void *Py_UNUSED(ctx), void *ptr,
+    size_t Py_UNUSED(size))
 {
     VirtualFree(ptr, 0, MEM_RELEASE);
 }
 
 #elif defined(ARENAS_USE_MMAP)
 static void *
-_PyObject_ArenaMmap(void *ctx, size_t size)
+_PyObject_ArenaMmap(void *Py_UNUSED(ctx), size_t size)
 {
     void *ptr;
     ptr = mmap(NULL, size, PROT_READ|PROT_WRITE,
@@ -158,20 +159,20 @@ _PyObject_ArenaMmap(void *ctx, size_t size)
 }
 
 static void
-_PyObject_ArenaMunmap(void *ctx, void *ptr, size_t size)
+_PyObject_ArenaMunmap(void *Py_UNUSED(ctx), void *ptr, size_t size)
 {
     munmap(ptr, size);
 }
 
 #else
 static void *
-_PyObject_ArenaMalloc(void *ctx, size_t size)
+_PyObject_ArenaMalloc(void *Py_UNUSED(ctx), size_t size)
 {
     return malloc(size);
 }
 
 static void
-_PyObject_ArenaFree(void *ctx, void *ptr, size_t size)
+_PyObject_ArenaFree(void *Py_UNUSED(ctx), void *ptr, size_t Py_UNUSED(size))
 {
     free(ptr);
 }
@@ -1684,7 +1685,7 @@ new_arena(void)
    pymalloc.  When the radix tree is used, 'poolp' is unused.
  */
 static bool
-address_in_range(void *p, poolp pool)
+address_in_range(void *p, poolp Py_UNUSED(pool))
 {
     return arena_map_is_used(p);
 }
@@ -1945,7 +1946,7 @@ allocate_from_new_pool(uint size)
    or when the max memory limit has been reached.
 */
 static inline void*
-pymalloc_alloc(void *ctx, size_t nbytes)
+pymalloc_alloc(void *Py_UNUSED(ctx), size_t nbytes)
 {
 #ifdef WITH_VALGRIND
     if (UNLIKELY(running_on_valgrind == -1)) {
@@ -2215,7 +2216,7 @@ insert_to_freepool(poolp pool)
    Return 1 if it was freed.
    Return 0 if the block was not allocated by pymalloc_alloc(). */
 static inline int
-pymalloc_free(void *ctx, void *p)
+pymalloc_free(void *Py_UNUSED(ctx), void *p)
 {
     assert(p != NULL);