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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2007-02-21 10:55:12 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-02-21 10:55:12 +0100 |
| commit | 118bcd31b309d12638f67729d5d96d4974750249 (patch) | |
| tree | f6bcceeada38052b47fe6b5b93348bc615468c19 /arch | |
| parent | 63db6e8d41c703c26a3ce767740a9c8484765a74 (diff) | |
| download | lwn-118bcd31b309d12638f67729d5d96d4974750249.tar.gz lwn-118bcd31b309d12638f67729d5d96d4974750249.zip | |
[S390] Optional ZONE_DMA for s390.
Disable ZONE_DMA on 31-bit. All memory is addressable by all
devices and we do not need any special memory pool.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/Kconfig | 4 | ||||
| -rw-r--r-- | arch/s390/mm/init.c | 2 |
2 files changed, 4 insertions, 2 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index eaaac3788110..d9425f59be91 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -8,8 +8,8 @@ config MMU default y config ZONE_DMA - bool - default y + def_bool y + depends on 64BIT config LOCKDEP_SUPPORT bool diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index b3e7c45efb63..916b72a8cde8 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -141,7 +141,9 @@ void __init paging_init(void) __raw_local_irq_ssm(ssm_mask); 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); } |