From 32ab0a3f51701cb37ab960635254d5f84ec3de0a Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Sat, 1 Aug 2015 02:16:37 -0400 Subject: 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 Cc: Ross Zwisler Cc: Christoph Hellwig Signed-off-by: Dan Williams --- tools/testing/nvdimm/Kbuild | 1 + tools/testing/nvdimm/test/iomap.c | 13 +++++++++++++ 2 files changed, 14 insertions(+) (limited to 'tools/testing/nvdimm') diff --git a/tools/testing/nvdimm/Kbuild b/tools/testing/nvdimm/Kbuild index 99e70f0729be..38b00ecb2ed5 100644 --- a/tools/testing/nvdimm/Kbuild +++ b/tools/testing/nvdimm/Kbuild @@ -2,6 +2,7 @@ ldflags-y += --wrap=ioremap_wc ldflags-y += --wrap=memremap ldflags-y += --wrap=devm_ioremap_nocache ldflags-y += --wrap=devm_memremap +ldflags-y += --wrap=devm_memunmap ldflags-y += --wrap=ioremap_nocache ldflags-y += --wrap=iounmap ldflags-y += --wrap=memunmap 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); -- cgit v1.2.3