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authorHeiko Carstens <heiko.carstens@de.ibm.com>2013-02-28 11:16:26 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-03-05 10:21:35 +0100
commita7bb1ae749e8051434e54936dcefd37ef1cfa753 (patch)
tree92ad2df12c02a5d7f59b56af13c4cf1dd4273e20 /arch/s390
parent6551fbdfd8b85d1ab5822ac98abb4fb449bcfae0 (diff)
s390/mm: fix vmemmap size calculation
The size of the vmemmap must be a multiple of PAGES_PER_SECTION, since the common code always initializes the vmemmap in such pieces. So we must round up in order to not have a too small vmemmap. Fixes an IPL crash on 31 bit with more than 1920MB. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kernel/setup.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index a5360de85ec7..29268859d8ee 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -571,6 +571,8 @@ static void __init setup_memory_end(void)
/* Split remaining virtual space between 1:1 mapping & vmemmap array */
tmp = VMALLOC_START / (PAGE_SIZE + sizeof(struct page));
+ /* vmemmap contains a multiple of PAGES_PER_SECTION struct pages */
+ tmp = SECTION_ALIGN_UP(tmp);
tmp = VMALLOC_START - tmp * sizeof(struct page);
tmp &= ~((vmax >> 11) - 1); /* align to page table level */
tmp = min(tmp, 1UL << MAX_PHYSMEM_BITS);