From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 10 Jun 2008 08:03:18 +0000 (+0200)
Subject: [S390] sparsemem: use SPARSEMEM_STATIC if !64BIT.
X-Git-Tag: v2.6.26-rc6~16^2~7
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=148f1678f0ba7a5e79e44ff23064d4326fa145a4;p=linux.git

[S390] sparsemem: use SPARSEMEM_STATIC if !64BIT.

In case of !64BIT kernel we end up with a zero sized mem_section array.
This happens because NR_MEM_SECTIONS is smaller than SECTIONS_PER_ROOT
but we have:

#define NR_SECTION_ROOTS (NR_MEM_SECTIONS / SECTIONS_PER_ROOT)

and

struct mem_section *mem_section[NR_SECTION_ROOTS];

So fix this by selecting SPARSEMEM_STATIC which makes sure
that SECTIONS_PER_ROOT is 1.

Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 93acb3c1859d..107e492cb47e 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -304,6 +304,7 @@ config ARCH_SPARSEMEM_ENABLE
 	def_bool y
 	select SPARSEMEM_VMEMMAP_ENABLE
 	select SPARSEMEM_VMEMMAP
+	select SPARSEMEM_STATIC if !64BIT
 
 config ARCH_SPARSEMEM_DEFAULT
 	def_bool y