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authorDan Williams <dan.j.williams@intel.com>2015-08-01 02:16:37 -0400
committerDan Williams <dan.j.williams@intel.com>2015-08-28 23:40:04 -0400
commit32ab0a3f51701cb37ab960635254d5f84ec3de0a (patch)
tree5e6ff1b400f4f1c42c7aecc76234f007d70e6a25 /tools/testing/nvdimm/test/iomap.c
parentlibnvdimm, pfn: 'struct page' provider infrastructure (diff)
downloadlinux-dev-32ab0a3f51701cb37ab960635254d5f84ec3de0a.tar.xz
linux-dev-32ab0a3f51701cb37ab960635254d5f84ec3de0a.zip
libnvdimm, pmem: 'struct page' for pmem
Enable the pmem driver to handle PFN device instances. Attaching a pmem namespace to a pfn device triggers the driver to allocate and initialize struct page entries for pmem. Memory capacity for this allocation comes exclusively from RAM for now which is suitable for low PMEM to RAM ratios. This mechanism will be expanded later for setting an "allocate from PMEM" policy. Cc: Boaz Harrosh <boaz@plexistor.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'tools/testing/nvdimm/test/iomap.c')
-rw-r--r--tools/testing/nvdimm/test/iomap.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c
index 179d2289f3a8..b7251314bbc0 100644
--- a/tools/testing/nvdimm/test/iomap.c
+++ b/tools/testing/nvdimm/test/iomap.c
@@ -108,6 +108,19 @@ void *__wrap_memremap(resource_size_t offset, size_t size,
}
EXPORT_SYMBOL(__wrap_memremap);
+void __wrap_devm_memunmap(struct device *dev, void *addr)
+{
+ struct nfit_test_resource *nfit_res;
+
+ rcu_read_lock();
+ nfit_res = get_nfit_res((unsigned long) addr);
+ rcu_read_unlock();
+ if (nfit_res)
+ return;
+ return devm_memunmap(dev, addr);
+}
+EXPORT_SYMBOL(__wrap_devm_memunmap);
+
void __iomem *__wrap_ioremap_nocache(resource_size_t offset, unsigned long size)
{
return __nfit_test_ioremap(offset, size, ioremap_nocache);