Commit 60c49701 authored Jun 01, 2017 by Heiko Carstens Committed by Martin Schwidefsky Jun 12, 2017

s390/mm: use correct address space when enabling DAT



Right now the kernel uses the primary address space until finally the
switch to the correct home address space will be done when the idle
PSW will be loaded within psw_idle().

Correct this and simply use the home address space when DAT is enabled
for the first time.

This doesn't really fix a bug, but fixes odd behavior.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

parent 36f6237e

arch/s390/mm/init.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -81,6 +81,7 @@ void __init paging_init(void)
		{
		unsigned long max_zone_pfns[MAX_NR_ZONES];
		unsigned long pgd_type, asce_bits;
		psw_t psw;

		init_mm.pgd = swapper_pg_dir;
		if (VMALLOC_END > (1UL << 42)) {
		@@ -100,7 +101,10 @@ void __init paging_init(void)
		__ctl_load(S390_lowcore.kernel_asce, 1, 1);
		__ctl_load(S390_lowcore.kernel_asce, 7, 7);
		__ctl_load(S390_lowcore.kernel_asce, 13, 13);
		__arch_local_irq_stosm(0x04);
		psw.mask = __extract_psw();
		psw_bits(psw).t = 1;
		psw_bits(psw).as = PSW_AS_HOME;
		__load_psw_mask(psw.mask);

		sparse_memory_present_with_active_regions(MAX_NUMNODES);
		sparse_init();

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