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authorDan Williams <dan.j.williams@intel.com>2015-08-19 00:34:34 -0400
committerDan Williams <dan.j.williams@intel.com>2015-08-19 00:34:34 -0400
commit7a67832c7e44c20935c5d6f2264035a0f7bf0d8f (patch)
tree1ace57d407ece741401f7b8878f1b2d85e990004 /drivers/nvdimm/Makefile
parent6ec689542b5bc516187917d49b112847dfb75b0b (diff)
downloadlinux-7a67832c7e44c20935c5d6f2264035a0f7bf0d8f.tar.bz2
libnvdimm, e820: make CONFIG_X86_PMEM_LEGACY a tristate option
We currently register a platform device for e820 type-12 memory and register a nvdimm bus beneath it. Registering the platform device triggers the device-core machinery to probe for a driver, but that search currently comes up empty. Building the nvdimm-bus registration into the e820_pmem platform device registration in this way forces libnvdimm to be built-in. Instead, convert the built-in portion of CONFIG_X86_PMEM_LEGACY to simply register a platform device and move the rest of the logic to the driver for e820_pmem, for the following reasons: 1/ Letting e820_pmem support be a module allows building and testing libnvdimm.ko changes without rebooting 2/ All the normal policy around modules can be applied to e820_pmem (unbind to disable and/or blacklisting the module from loading by default) 3/ Moving the driver to a generic location and converting it to scan "iomem_resource" rather than "e820.map" means any other architecture can take advantage of this simple nvdimm resource discovery mechanism by registering a resource named "Persistent Memory (legacy)" Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/Makefile')
-rw-r--r--drivers/nvdimm/Makefile3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/nvdimm/Makefile b/drivers/nvdimm/Makefile
index 594bb97c867a..9bf15db52dee 100644
--- a/drivers/nvdimm/Makefile
+++ b/drivers/nvdimm/Makefile
@@ -2,6 +2,7 @@ obj-$(CONFIG_LIBNVDIMM) += libnvdimm.o
obj-$(CONFIG_BLK_DEV_PMEM) += nd_pmem.o
obj-$(CONFIG_ND_BTT) += nd_btt.o
obj-$(CONFIG_ND_BLK) += nd_blk.o
+obj-$(CONFIG_X86_PMEM_LEGACY) += nd_e820.o
nd_pmem-y := pmem.o
@@ -9,6 +10,8 @@ nd_btt-y := btt.o
nd_blk-y := blk.o
+nd_e820-y := e820.o
+
libnvdimm-y := core.o
libnvdimm-y += bus.o
libnvdimm-y += dimm_devs.o