[patch 07/21] mm: introduce non panic alloc_bootmem

[npiggin@suse.de]

[-- Attachment #1: __alloc_bootmem_node_nopanic.patch --]
[-- Type: text/plain, Size: 2070 bytes --]

Straight forward variant of the existing __alloc_bootmem_node, only 
difference is that it doesn't panic on failure. We use this in a
subsequent patch when allocating giant hugepages at boot -- don't want
to panic if we can't allocate as many as the user asked for.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Nick Piggin <npiggin@suse.de>
---
 include/linux/bootmem.h |    4 ++++
 mm/bootmem.c            |   12 ++++++++++++
 2 files changed, 16 insertions(+)

Index: linux-2.6/mm/bootmem.c
===================================================================
--- linux-2.6.orig/mm/bootmem.c	2008-06-04 20:47:34.000000000 +1000
+++ linux-2.6/mm/bootmem.c	2008-06-04 20:51:21.000000000 +1000
@@ -576,6 +576,18 @@ void * __init alloc_bootmem_section(unsi
 }
 #endif
 
+void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
+				   unsigned long align, unsigned long goal)
+{
+	void *ptr;
+
+	ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0);
+	if (ptr)
+		return ptr;
+
+	return __alloc_bootmem_nopanic(size, align, goal);
+}
+
 #ifndef ARCH_LOW_ADDRESS_LIMIT
 #define ARCH_LOW_ADDRESS_LIMIT	0xffffffffUL
 #endif
Index: linux-2.6/include/linux/bootmem.h
===================================================================
--- linux-2.6.orig/include/linux/bootmem.h	2008-06-04 20:47:34.000000000 +1000
+++ linux-2.6/include/linux/bootmem.h	2008-06-04 20:51:21.000000000 +1000
@@ -87,6 +87,10 @@ extern void *__alloc_bootmem_node(pg_dat
 				  unsigned long size,
 				  unsigned long align,
 				  unsigned long goal);
+extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
+				  unsigned long size,
+				  unsigned long align,
+				  unsigned long goal);
 extern unsigned long init_bootmem_node(pg_data_t *pgdat,
 				       unsigned long freepfn,
 				       unsigned long startpfn,

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