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| author | Ben Widawsky <ben.widawsky@intel.com> | 2021-08-02 10:30:05 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2021-08-06 08:22:54 -0700 |
| commit | 3d135db510240fefd79da46181493d3e3b415f6b (patch) | |
| tree | 037ec26d21c8fee3c90323c3ddd628a829032d8e /drivers/cxl/core/core.h | |
| parent | 9cc238c7a526dba9ee8c210fa2828886fc65db66 (diff) | |
| download | lwn-3d135db510240fefd79da46181493d3e3b415f6b.tar.gz lwn-3d135db510240fefd79da46181493d3e3b415f6b.zip | |
cxl/core: Move memdev management to core
The motivation for moving cxl_memdev allocation to the core (beyond
better file organization of sysfs attributes in core/ and drivers in
cxl/), is that device lifetime is longer than module lifetime. The cxl_pci
module should be free to come and go without needing to coordinate with
devices that need the text associated with cxl_memdev_release() to stay
resident. The move fixes a use after free bug when looping driver
load / unload with CONFIG_DEBUG_KOBJECT_RELEASE=y.
Another motivation for disconnecting cxl_memdev creation from cxl_pci is
to enable other drivers, like a unit test driver, to registers memdevs.
Fixes: b39cb1052a5c ("cxl/mem: Register CXL memX devices")
Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/162792540495.368511.9748638751088219595.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/core/core.h')
| -rw-r--r-- | drivers/cxl/core/core.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cxl/core/core.h b/drivers/cxl/core/core.h index 49045daf8bd7..036a3c8106b4 100644 --- a/drivers/cxl/core/core.h +++ b/drivers/cxl/core/core.h @@ -14,4 +14,7 @@ static inline void unregister_cxl_dev(void *dev) device_unregister(dev); } +int cxl_memdev_init(void); +void cxl_memdev_exit(void); + #endif /* __CXL_CORE_H__ */ |