Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:

 - a few misc things

 - the rest of MM

-  remove flex_arrays, replace with new simple radix-tree implementation

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (38 commits)
  Drop flex_arrays
  sctp: convert to genradix
  proc: commit to genradix
  generic radix trees
  selinux: convert to kvmalloc
  md: convert to kvmalloc
  openvswitch: convert to kvmalloc
  of: fix kmemleak crash caused by imbalance in early memory reservation
  mm: memblock: update comments and kernel-doc
  memblock: split checks whether a region should be skipped to a helper function
  memblock: remove memblock_{set,clear}_region_flags
  memblock: drop memblock_alloc_*_nopanic() variants
  memblock: memblock_alloc_try_nid: don't panic
  treewide: add checks for the return value of memblock_alloc*()
  swiotlb: add checks for the return value of memblock_alloc*()
  init/main: add checks for the return value of memblock_alloc*()
  mm/percpu: add checks for the return value of memblock_alloc*()
  sparc: add checks for the return value of memblock_alloc*()
  ia64: add checks for the return value of memblock_alloc*()
  arch: don't memset(0) memory returned by memblock_alloc()
  ...

8 files changed, 41 insertions, 22 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 2624de16cd7a..8dcbf6890714 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -935,6 +935,9 @@ static int __init acpi_parse_hpet(struct acpi_table_header *table)
 #define HPET_RESOURCE_NAME_SIZE 9
 	hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
 				  SMP_CACHE_BYTES);
+	if (!hpet_res)
+		panic("%s: Failed to allocate %zu bytes\n", __func__,
+		      sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
 
 	hpet_res->name = (void *)&hpet_res[1];
 	hpet_res->flags = IORESOURCE_MEM;
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 264e3221d923..53aa234a6803 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2581,6 +2581,8 @@ static struct resource * __init ioapic_setup_resources(void)
 	n *= nr_ioapics;
 
 	mem = memblock_alloc(n, SMP_CACHE_BYTES);
+	if (!mem)
+		panic("%s: Failed to allocate %lu bytes\n", __func__, n);
 	res = (void *)mem;
 
 	mem += sizeof(struct resource) * nr_ioapics;
@@ -2625,6 +2627,9 @@ fake_ioapic_page:
 #endif
 			ioapic_phys = (unsigned long)memblock_alloc(PAGE_SIZE,
 								    PAGE_SIZE);
+			if (!ioapic_phys)
+				panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
+				      __func__, PAGE_SIZE, PAGE_SIZE);
 			ioapic_phys = __pa(ioapic_phys);
 		}
 		set_fixmap_nocache(idx, ioapic_phys);
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 666e4af145a2..2879e234e193 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -776,7 +776,7 @@ u64 __init e820__memblock_alloc_reserved(u64 size, u64 align)
 {
 	u64 addr;
 
-	addr = __memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
+	addr = memblock_phys_alloc(size, align);
 	if (addr) {
 		e820__range_update_kexec(addr, size, E820_TYPE_RAM, E820_TYPE_RESERVED);
 		pr_info("update e820_table_kexec for e820__memblock_alloc_reserved()\n");
@@ -1097,6 +1097,9 @@ void __init e820__reserve_resources(void)
 
 	res = memblock_alloc(sizeof(*res) * e820_table->nr_entries,
 			     SMP_CACHE_BYTES);
+	if (!res)
+		panic("%s: Failed to allocate %zu bytes\n", __func__,
+		      sizeof(*res) * e820_table->nr_entries);
 	e820_res = res;
 
 	for (i = 0; i < e820_table->nr_entries; i++) {
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 13af08827eef..4bf46575568a 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -106,22 +106,22 @@ static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size,
 	void *ptr;
 
 	if (!node_online(node) || !NODE_DATA(node)) {
-		ptr = memblock_alloc_from_nopanic(size, align, goal);
+		ptr = memblock_alloc_from(size, align, goal);
 		pr_info("cpu %d has no node %d or node-local memory\n",
 			cpu, node);
 		pr_debug("per cpu data for cpu%d %lu bytes at %016lx\n",
 			 cpu, size, __pa(ptr));
 	} else {
-		ptr = memblock_alloc_try_nid_nopanic(size, align, goal,
-						     MEMBLOCK_ALLOC_ACCESSIBLE,
-						     node);
+		ptr = memblock_alloc_try_nid(size, align, goal,
+					     MEMBLOCK_ALLOC_ACCESSIBLE,
+					     node);
 
 		pr_debug("per cpu data for cpu%d %lu bytes on node%d at %016lx\n",
 			 cpu, size, node, __pa(ptr));
 	}
 	return ptr;
 #else
-	return memblock_alloc_from_nopanic(size, align, goal);
+	return memblock_alloc_from(size, align, goal);
 #endif
 }
 
diff --git a/arch/x86/mm/kasan_init_64.c b/arch/x86/mm/kasan_init_64.c
index 462fde83b515..8dc0fc0b1382 100644
--- a/arch/x86/mm/kasan_init_64.c
+++ b/arch/x86/mm/kasan_init_64.c
@@ -24,14 +24,16 @@ extern struct range pfn_mapped[E820_MAX_ENTRIES];
 
 static p4d_t tmp_p4d_table[MAX_PTRS_PER_P4D] __initdata __aligned(PAGE_SIZE);
 
-static __init void *early_alloc(size_t size, int nid, bool panic)
+static __init void *early_alloc(size_t size, int nid, bool should_panic)
 {
-	if (panic)
-		return memblock_alloc_try_nid(size, size,
-			__pa(MAX_DMA_ADDRESS), MEMBLOCK_ALLOC_ACCESSIBLE, nid);
-	else
-		return memblock_alloc_try_nid_nopanic(size, size,
+	void *ptr = memblock_alloc_try_nid(size, size,
 			__pa(MAX_DMA_ADDRESS), MEMBLOCK_ALLOC_ACCESSIBLE, nid);
+
+	if (!ptr && should_panic)
+		panic("%pS: Failed to allocate page, nid=%d from=%lx\n",
+		      (void *)_RET_IP_, nid, __pa(MAX_DMA_ADDRESS));
+
+	return ptr;
 }
 
 static void __init kasan_populate_pmd(pmd_t *pmd, unsigned long addr,
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 12c1b7a83ed7..dfb6c4df639a 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -195,15 +195,11 @@ static void __init alloc_node_data(int nid)
 	 * Allocate node data.  Try node-local memory and then any node.
 	 * Never allocate in DMA zone.
 	 */
-	nd_pa = memblock_phys_alloc_nid(nd_size, SMP_CACHE_BYTES, nid);
+	nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid);
 	if (!nd_pa) {
-		nd_pa = __memblock_alloc_base(nd_size, SMP_CACHE_BYTES,
-					      MEMBLOCK_ALLOC_ACCESSIBLE);
-		if (!nd_pa) {
-			pr_err("Cannot find %zu bytes in any node (initial node: %d)\n",
-			       nd_size, nid);
-			return;
-		}
+		pr_err("Cannot find %zu bytes in any node (initial node: %d)\n",
+		       nd_size, nid);
+		return;
 	}
 	nd = __va(nd_pa);
 
diff --git a/arch/x86/platform/olpc/olpc_dt.c b/arch/x86/platform/olpc/olpc_dt.c
index b4ab779f1d47..ac9e7bf49b66 100644
--- a/arch/x86/platform/olpc/olpc_dt.c
+++ b/arch/x86/platform/olpc/olpc_dt.c
@@ -141,6 +141,9 @@ void * __init prom_early_alloc(unsigned long size)
 		 * wasted bootmem) and hand off chunks of it to callers.
 		 */
 		res = memblock_alloc(chunk_size, SMP_CACHE_BYTES);
+		if (!res)
+			panic("%s: Failed to allocate %zu bytes\n", __func__,
+			      chunk_size);
 		BUG_ON(!res);
 		prom_early_allocated += chunk_size;
 		memset(res, 0, chunk_size);
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 055e37e43541..95ce9b5be411 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -181,8 +181,15 @@ static void p2m_init_identity(unsigned long *p2m, unsigned long pfn)
 
 static void * __ref alloc_p2m_page(void)
 {
-	if (unlikely(!slab_is_available()))
-		return memblock_alloc(PAGE_SIZE, PAGE_SIZE);
+	if (unlikely(!slab_is_available())) {
+		void *ptr = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
+
+		if (!ptr)
+			panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
+			      __func__, PAGE_SIZE, PAGE_SIZE);
+
+		return ptr;
+	}
 
 	return (void *)__get_free_page(GFP_KERNEL);
 }