[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 93acb3c1859d565e92774ed4700028ed10c4bbb0..107e492cb47efa8fab159a8714d89cdcac29d5ae 100644 (file)
--- 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