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SubjectRegression in v4.2-rc1: vmalloc_to_page with ioremap
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vmalloc_to_page with ioremap'd memory used to work correctly till v4.1. In
v4.2-rc1 when ioremap is done using huge pages vmalloc_to_page on ioremap'd
memory crashes. Are there plans to fix this?

An example of the use of vmalloc_to_page with ioremap is in the Intel MIC SCIF
driver (drivers/misc/mic/scif/scif_nodeqp.c) which dma map's the ioremap'd range
of one device to a second device.

Thanks,
Ashutosh


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