diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/dma/direct.c | 1 | ||||
| -rw-r--r-- | kernel/trace/trace.c | 10 |
2 files changed, 11 insertions, 0 deletions
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 1f9ee9759426..f973e7e73c90 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -481,6 +481,7 @@ int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents, case PCI_P2PDMA_MAP_BUS_ADDR: sg->dma_address = pci_p2pdma_bus_addr_map(&p2pdma_state, sg_phys(sg)); + sg_dma_len(sg) = sg->length; sg_dma_mark_bus_address(sg); continue; default: diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index d1e527cf2aae..304e93597126 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -8781,8 +8781,18 @@ static void tracing_buffers_mmap_close(struct vm_area_struct *vma) put_snapshot_map(iter->tr); } +static int tracing_buffers_may_split(struct vm_area_struct *vma, unsigned long addr) +{ + /* + * Trace buffer mappings require the complete buffer including + * the meta page. Partial mappings are not supported. + */ + return -EINVAL; +} + static const struct vm_operations_struct tracing_buffers_vmops = { .close = tracing_buffers_mmap_close, + .may_split = tracing_buffers_may_split, }; static int tracing_buffers_mmap(struct file *filp, struct vm_area_struct *vma) |