memblock, treewide: make memblock_free() handle late freeing

It shouldn't be responsibility of memblock users to detect if they free
memory allocated from memblock late and should use memblock_free_late().

Make memblock_free() and memblock_phys_free() take care of late memory
freeing and drop memblock_free_late().

Link: https://patch.msgid.link/20260323074836.3653702-9-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>

arch/sparc/kernel/mdesc.c

@@ -183,14 +183,12 @@ static struct mdesc_handle * __init mdesc_memblock_alloc(unsigned int mdesc_size
 static void __init mdesc_memblock_free(struct mdesc_handle *hp)
 {
 	unsigned int alloc_size;
-	unsigned long start;
 
 	BUG_ON(refcount_read(&hp->refcnt) != 0);
 	BUG_ON(!list_empty(&hp->list));
 
 	alloc_size = PAGE_ALIGN(hp->handle_size);
-	start = __pa(hp);
+	memblock_free(hp, alloc_size);
-	memblock_free_late(start, alloc_size);
 }
 
 static struct mdesc_mem_ops memblock_mdesc_ops = {

arch/x86/kernel/setup.c

@@ -426,7 +426,7 @@ int __init ima_free_kexec_buffer(void)
 	if (!ima_kexec_buffer_size)
 		return -ENOENT;
 
-	memblock_free_late(ima_kexec_buffer_phys,
+	memblock_phys_free(ima_kexec_buffer_phys,
 			   ima_kexec_buffer_size);
 
 	ima_kexec_buffer_phys = 0;

arch/x86/platform/efi/memmap.c

@@ -34,9 +34,6 @@ static
 void __init __efi_memmap_free(u64 phys, unsigned long size, unsigned long flags)
 {
 	if (flags & EFI_MEMMAP_MEMBLOCK) {
-		if (slab_is_available())
-			memblock_free_late(phys, size);
-		else
 		memblock_phys_free(phys, size);
 	} else if (flags & EFI_MEMMAP_SLAB) {
 		struct page *p = pfn_to_page(PHYS_PFN(phys));

arch/x86/platform/efi/quirks.c

@@ -372,7 +372,7 @@ void __init efi_reserve_boot_services(void)
 		 * doesn't make sense as far as the firmware is
 		 * concerned, but it does provide us with a way to tag
 		 * those regions that must not be paired with
-		 * memblock_free_late().
+		 * memblock_phys_free().
 		 */
 		md->attribute |= EFI_MEMORY_RUNTIME;
 	}

drivers/firmware/efi/apple-properties.c

@@ -226,7 +226,7 @@ static int __init map_properties(void)
 		 */
 		data->len = 0;
 		memunmap(data);
-		memblock_free_late(pa_data + sizeof(*data), data_len);
+		memblock_phys_free(pa_data + sizeof(*data), data_len);
 
 		return ret;
 	}

drivers/of/kexec.c

@@ -175,7 +175,7 @@ int __init ima_free_kexec_buffer(void)
 	if (ret)
 		return ret;
 
-	memblock_free_late(addr, size);
+	memblock_phys_free(addr, size);
 	return 0;
 }
 #endif

include/linux/memblock.h

@@ -172,8 +172,6 @@ void __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags,
 			  struct memblock_type *type_b, phys_addr_t *out_start,
 			  phys_addr_t *out_end, int *out_nid);
 
-void memblock_free_late(phys_addr_t base, phys_addr_t size);
-
 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
 static inline void __next_physmem_range(u64 *idx, struct memblock_type *type,
 					phys_addr_t *out_start,

kernel/dma/swiotlb.c

@@ -546,10 +546,10 @@ void __init swiotlb_exit(void)
 		free_pages(tbl_vaddr, get_order(tbl_size));
 		free_pages((unsigned long)mem->slots, get_order(slots_size));
 	} else {
-		memblock_free_late(__pa(mem->areas),
+		memblock_free(mem->areas,
 			array_size(sizeof(*mem->areas), mem->nareas));
-		memblock_free_late(mem->start, tbl_size);
+		memblock_phys_free(mem->start, tbl_size);
-		memblock_free_late(__pa(mem->slots), slots_size);
+		memblock_free(mem->slots, slots_size);
 	}
 
 	memset(mem, 0, sizeof(*mem));

lib/bootconfig.c

@@ -64,7 +64,7 @@ static inline void __init xbc_free_mem(void *addr, size_t size, bool early)
 	if (early)
 		memblock_free(addr, size);
 	else if (addr)
-		memblock_free_late(__pa(addr), size);
+		memblock_free(addr, size);
 }
 
 #else /* !__KERNEL__ */

mm/kfence/core.c

@@ -731,10 +731,10 @@ static bool __init kfence_init_pool_early(void)
 	 * fails for the first page, and therefore expect addr==__kfence_pool in
 	 * most failure cases.
 	 */
-	memblock_free_late(__pa(addr), KFENCE_POOL_SIZE - (addr - (unsigned long)__kfence_pool));
+	memblock_free((void *)addr, KFENCE_POOL_SIZE - (addr - (unsigned long)__kfence_pool));
 	__kfence_pool = NULL;
 
-	memblock_free_late(__pa(kfence_metadata_init), KFENCE_METADATA_SIZE);
+	memblock_free(kfence_metadata_init, KFENCE_METADATA_SIZE);
 	kfence_metadata_init = NULL;
 
 	return false;

mm/memblock.c

@@ -385,26 +385,27 @@ static void __init_memblock memblock_remove_region(struct memblock_type *type, u
  */
 void __init memblock_discard(void)
 {
-	phys_addr_t addr, size;
+	phys_addr_t size;
+	void *addr;
 
 	if (memblock.reserved.regions != memblock_reserved_init_regions) {
-		addr = __pa(memblock.reserved.regions);
+		addr = memblock.reserved.regions;
 		size = PAGE_ALIGN(sizeof(struct memblock_region) *
 				  memblock.reserved.max);
 		if (memblock_reserved_in_slab)
-			kfree(memblock.reserved.regions);
+			kfree(addr);
 		else
-			memblock_free_late(addr, size);
+			memblock_free(addr, size);
 	}
 
 	if (memblock.memory.regions != memblock_memory_init_regions) {
-		addr = __pa(memblock.memory.regions);
+		addr = memblock.memory.regions;
 		size = PAGE_ALIGN(sizeof(struct memblock_region) *
 				  memblock.memory.max);
 		if (memblock_memory_in_slab)
-			kfree(memblock.memory.regions);
+			kfree(addr);
 		else
-			memblock_free_late(addr, size);
+			memblock_free(addr, size);
 	}
 
 	memblock_memory = NULL;
@@ -962,7 +963,8 @@ unsigned long free_reserved_area(void *start, void *end, int poison, const char
  * @size: size of the boot memory block in bytes
  *
  * Free boot memory block previously allocated by memblock_alloc_xx() API.
- * The freeing memory will not be released to the buddy allocator.
+ * If called after the buddy allocator is available, the memory is released to
+ * the buddy allocator.
  */
 void __init_memblock memblock_free(void *ptr, size_t size)
 {
@@ -976,17 +978,24 @@ void __init_memblock memblock_free(void *ptr, size_t size)
  * @size: size of the boot memory block in bytes
  *
  * Free boot memory block previously allocated by memblock_phys_alloc_xx() API.
- * The freeing memory will not be released to the buddy allocator.
+ * If called after the buddy allocator is available, the memory is released to
+ * the buddy allocator.
  */
 int __init_memblock memblock_phys_free(phys_addr_t base, phys_addr_t size)
 {
 	phys_addr_t end = base + size - 1;
+	int ret;
 
 	memblock_dbg("%s: [%pa-%pa] %pS\n", __func__,
 		     &base, &end, (void *)_RET_IP_);
 
 	kmemleak_free_part_phys(base, size);
-	return memblock_remove_range(&memblock.reserved, base, size);
+	ret = memblock_remove_range(&memblock.reserved, base, size);
+
+	if (slab_is_available())
+		__free_reserved_area(base, base + size, -1);
+
+	return ret;
 }
 
 int __init_memblock __memblock_reserve(phys_addr_t base, phys_addr_t size,
@@ -1814,26 +1823,6 @@ void *__init __memblock_alloc_or_panic(phys_addr_t size, phys_addr_t align,
 	return addr;
 }
 
-/**
- * memblock_free_late - free pages directly to buddy allocator
- * @base: phys starting address of the  boot memory block
- * @size: size of the boot memory block in bytes
- *
- * This is only useful when the memblock allocator has already been torn
- * down, but we are still initializing the system.  Pages are released directly
- * to the buddy allocator.
- */
-void __init memblock_free_late(phys_addr_t base, phys_addr_t size)
-{
-	phys_addr_t end = base + size - 1;
-
-	memblock_dbg("%s: [%pa-%pa] %pS\n",
-		     __func__, &base, &end, (void *)_RET_IP_);
-
-	kmemleak_free_part_phys(base, size);
-	__free_reserved_area(base, base + size, -1);
-}
-
 /*
  * Remaining API functions
  */