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| author | Halil Pasic | 2019-07-24 00:51:55 +0200 |
|---|---|---|
| committer | Heiko Carstens | 2019-07-26 13:36:12 +0200 |
| commit | 1a2dcff881059dedc14fafc8a442664c8dbd60f1 (patch) | |
| tree | fa84090e78308c2588d76de59c26a88204ed246a /arch/s390 | |
| parent | s390/kasan: add bitops instrumentation (diff) | |
| download | kernel-qcow2-linux-1a2dcff881059dedc14fafc8a442664c8dbd60f1.tar.gz kernel-qcow2-linux-1a2dcff881059dedc14fafc8a442664c8dbd60f1.tar.xz kernel-qcow2-linux-1a2dcff881059dedc14fafc8a442664c8dbd60f1.zip | |
s390/dma: provide proper ARCH_ZONE_DMA_BITS value
On s390 ZONE_DMA is up to 2G, i.e. ARCH_ZONE_DMA_BITS should be 31 bits.
The current value is 24 and makes __dma_direct_alloc_pages() take a
wrong turn first (but __dma_direct_alloc_pages() recovers then).
Let's correct ARCH_ZONE_DMA_BITS value and avoid wrong turns.
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Reported-by: Petr Tesarik <ptesarik@suse.cz>
Fixes: c61e9637340e ("dma-direct: add support for allocation from ZONE_DMA and ZONE_DMA32")
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/page.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index a4d38092530a..823578c6b9e2 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -177,6 +177,8 @@ static inline int devmem_is_allowed(unsigned long pfn) #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) +#define ARCH_ZONE_DMA_BITS 31 + #include <asm-generic/memory_model.h> #include <asm-generic/getorder.h> |