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[S390] mm: add ZONE_DMA to 31-bit config again

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Add ZONE_DMA to 31-bit config again. The performance gain is minimal
and hardly anybody cares anymore about a 31-bit kernel.
So add ZONE_DMA again to help with SLAB_CACHE_DMA removal for
!CONFIG_ZONE_DMA configurations.

Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Heiko Carstens 2011-05-26 09:48:31 +02:00
parent 33ce614029
commit 69dbb2f79a
3 changed files with 1 additions and 5 deletions
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2
arch/s390/Kconfig
View File

@ -2,7 +2,7 @@ config MMU
def_bool y
config ZONE_DMA
def_bool y if 64BIT
def_bool y
config LOCKDEP_SUPPORT
def_bool y

2
arch/s390/appldata/appldata_mem.c
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@ -92,9 +92,7 @@ static void appldata_get_mem_data(void *data)
mem_data->pswpin = ev[PSWPIN];
mem_data->pswpout = ev[PSWPOUT];
mem_data->pgalloc = ev[PGALLOC_NORMAL];
#ifdef CONFIG_ZONE_DMA
mem_data->pgalloc += ev[PGALLOC_DMA];
#endif
mem_data->pgfault = ev[PGFAULT];
mem_data->pgmajfault = ev[PGMAJFAULT];

2
arch/s390/mm/init.c
View File

@ -119,9 +119,7 @@ void __init paging_init(void)
sparse_memory_present_with_active_regions(MAX_NUMNODES);
sparse_init();
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
#ifdef CONFIG_ZONE_DMA
max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS);
#endif
max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
free_area_init_nodes(max_zone_pfns);
fault_init();