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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2013-02-28 11:16:26 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-03-05 10:21:35 +0100 |
| commit | a7bb1ae749e8051434e54936dcefd37ef1cfa753 (patch) | |
| tree | 92ad2df12c02a5d7f59b56af13c4cf1dd4273e20 /arch/s390/kernel/setup.c | |
| parent | 6551fbdfd8b85d1ab5822ac98abb4fb449bcfae0 (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/kernel/setup.c')
| -rw-r--r-- | arch/s390/kernel/setup.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index a5360de85ec..29268859d8e 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); |