mm: nobootmem: panic on node-specific allocation failure

__alloc_bootmem_node and __alloc_bootmem_low_node documentation claims
the functions panic on allocation failure.  Do it.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 16 insertions, 4 deletions

diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 1983fb1c7026..cca76207e61a 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -305,11 +305,17 @@ again:
 
         ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align,
                                         goal, -1ULL);
-        if (!ptr && goal) {
+        if (ptr)
+                return ptr;
+
+        if (goal) {
                 goal = 0;
                 goto again;
         }
-        return ptr;
+
+        printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
+        panic("Out of memory");
+        return NULL;
 }
 
 void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
@@ -407,6 +413,12 @@ void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
         if (ptr)
                 return ptr;
 
-        return  __alloc_memory_core_early(MAX_NUMNODES, size, align,
-                                goal, ARCH_LOW_ADDRESS_LIMIT);
+        ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align,
+                                        goal, ARCH_LOW_ADDRESS_LIMIT);
+        if (ptr)
+                return ptr;
+
+        printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
+        panic("Out of memory");
+        return NULL;
 }