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[S390] smp: fix lowcore allocation 

The intermediate lowcore for CONFIG_SMP is allocated using a call to
__alloc_bootmem() with a goal of 0. That however doesn't guarantee that
the allocated piece of memory is below 2GB.
Instead we should call __alloc_bootmem_low().

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
hifive-unleashed-5.1
Heiko Carstens 2010-03-24 11:49:51 +01:00 committed by Martin Schwidefsky
parent 92fe31329c
commit a08786568a
1 changed files with 2 additions and 2 deletions
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4
arch/s390/kernel/setup.c
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@ -401,7 +401,7 @@ setup_lowcore(void)
* Setup lowcore for boot cpu
*/
BUILD_BUG_ON(sizeof(struct _lowcore) != LC_PAGES * 4096);
lc = __alloc_bootmem(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0);
lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0);
lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
lc->restart_psw.addr =
PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
@ -433,7 +433,7 @@ setup_lowcore(void)
#ifndef CONFIG_64BIT
if (MACHINE_HAS_IEEE) {
lc->extended_save_area_addr = (__u32)
__alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
__alloc_bootmem_low(PAGE_SIZE, PAGE_SIZE, 0);
/* enable extended save area */
__ctl_set_bit(14, 29);
}