[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>

diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 77a63ae..ba363d9 100644 (file)
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -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);
        }