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| author | Dan Williams <dan.j.williams@intel.com> | 2021-11-16 00:20:57 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2021-11-25 06:21:35 +0300 |
| commit | 83762cb5c7c464af4cbaba5679af31c7fe534979 (patch) | |
| tree | b06e78c175214dfe3679bd20233c4caffd9c216b /drivers/dax/pmem/pmem.c | |
| parent | fa55b7dcdc43c1aa1ba12bca9d2dd4318c2a0dbf (diff) | |
| download | linux-83762cb5c7c464af4cbaba5679af31c7fe534979.tar.xz | |
dax: Kill DEV_DAX_PMEM_COMPAT
The /sys/class/dax compatibility option has shipped in the kernel for 4
years now which should be sufficient time for tools to abandon the old
ABI in favor of the /sys/bus/dax device-model. Delete it now and see if
anyone screams.
Since this compatibility option shipped there has been more reports of
users being surprised by the compat ABI than surprised by the "new", so
the compat infrastructure has outlived its usefulness. Recall that
/sys/bus/dax device-model is required for the dax kmem driver which
allows PMEM to be used as "System RAM".
The following projects were known to have a dependency on /sys/class/dax
and have dropped their dependency as of the listed version:
- ndctl (including libndctl, daxctl, and libdaxctl): v64+
- fio: v3.13+
- pmdk: v1.5.2+
As further evidence this option is no longer needed some distributions
have already stopped enabling CONFIG_DEV_DAX_PMEM_COMPAT.
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Reported-by: Vishal Verma <vishal.l.verma@intel.com>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Jane Chu <jane.chu@oracle.com>
Link: https://lore.kernel.org/r/163701116195.3784476.726128179293466337.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dax/pmem/pmem.c')
| -rw-r--r-- | drivers/dax/pmem/pmem.c | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/drivers/dax/pmem/pmem.c b/drivers/dax/pmem/pmem.c index 0ae4238a0ef8..dfe91a2990fe 100644 --- a/drivers/dax/pmem/pmem.c +++ b/drivers/dax/pmem/pmem.c @@ -7,34 +7,4 @@ #include <linux/nd.h> #include "../bus.h" -static int dax_pmem_probe(struct device *dev) -{ - return PTR_ERR_OR_ZERO(__dax_pmem_probe(dev, DEV_DAX_BUS)); -} -static struct nd_device_driver dax_pmem_driver = { - .probe = dax_pmem_probe, - .drv = { - .name = "dax_pmem", - }, - .type = ND_DRIVER_DAX_PMEM, -}; - -static int __init dax_pmem_init(void) -{ - return nd_driver_register(&dax_pmem_driver); -} -module_init(dax_pmem_init); - -static void __exit dax_pmem_exit(void) -{ - driver_unregister(&dax_pmem_driver.drv); -} -module_exit(dax_pmem_exit); - -MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("Intel Corporation"); -#if !IS_ENABLED(CONFIG_DEV_DAX_PMEM_COMPAT) -/* For compat builds, don't load this module by default */ -MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DAX_PMEM); -#endif |