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| author | Dan Williams <dan.j.williams@intel.com> | 2018-06-02 11:43:39 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2018-06-02 17:05:43 -0700 |
| commit | d76401ade0bb6ab0a70dea317ec115d5425880cf (patch) | |
| tree | 39897c699f5b0a7e467b5d63fa7a2c676b779b31 /kernel/resource.c | |
| parent | 3f46833df94eec3b7057181898e02cb9e4a49074 (diff) | |
| download | op-kernel-dev-d76401ade0bb6ab0a70dea317ec115d5425880cf.zip op-kernel-dev-d76401ade0bb6ab0a70dea317ec115d5425880cf.tar.gz | |
libnvdimm, e820: Register all pmem resources
There is currently a mismatch between the resources that will trigger
the e820_pmem driver to register/load and the resources that will
actually be surfaced as pmem ranges. register_e820_pmem() uses
walk_iomem_res_desc() which includes children and siblings. In contrast,
e820_pmem_probe() only considers top level resources. For example the
following resource tree results in the driver being loaded, but no
resources being registered:
398000000000-39bfffffffff : PCI Bus 0000:ae
39be00000000-39bf07ffffff : PCI Bus 0000:af
39be00000000-39beffffffff : 0000:af:00.0
39be10000000-39beffffffff : Persistent Memory (legacy)
Fix this up to allow definitions of "legacy" pmem ranges anywhere in
system-physical address space. Not that it is a recommended or safe to
define a pmem range in PCI space, but it is useful for debug /
experimentation, and the restriction on being a top-level resource was
arbitrary.
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'kernel/resource.c')
| -rw-r--r-- | kernel/resource.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/resource.c b/kernel/resource.c index 2af6c03..b85f59e 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -448,6 +448,7 @@ int walk_iomem_res_desc(unsigned long desc, unsigned long flags, u64 start, return __walk_iomem_res_desc(&res, desc, false, arg, func); } +EXPORT_SYMBOL_GPL(walk_iomem_res_desc); /* * This function calls the @func callback against all memory ranges of type |
