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libnvdimm, pmem: allow nfit_test to override pmem_direct_access()

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Currently phys_to_pfn_t() is an exported symbol to allow nfit_test to
override it and indicate that nfit_test-pmem is not device-mapped.  Now,
we want to enable nfit_test to operate without DMA_CMA and the pmem it
provides will no longer be physically contiguous, i.e. won't be capable
of supporting direct_access requests larger than a page.  Make
pmem_direct_access() a weak symbol so that it can be replaced by the
tools/testing/nvdimm/ version, and move phys_to_pfn_t() to a static
inline now that it no longer needs to be overridden.

Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2016-06-17 11:08:06 -07:00
parent e02fb7264d
commit f295e53b60
8 changed files with 79 additions and 24 deletions
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5
include/linux/pfn_t.h
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@@ -28,7 +28,10 @@ static inline pfn_t pfn_to_pfn_t(unsigned long pfn)
return __pfn_to_pfn_t(pfn, 0);
}
extern pfn_t phys_to_pfn_t(phys_addr_t addr, u64 flags);
static inline pfn_t phys_to_pfn_t(phys_addr_t addr, u64 flags)
{
return __pfn_to_pfn_t(addr >> PAGE_SHIFT, flags);
}
static inline bool pfn_t_has_page(pfn_t pfn)
{