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| author | Dan Williams <dan.j.williams@intel.com> | 2020-04-02 19:55:17 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2020-04-02 19:55:17 -0700 |
| commit | f6d2b802f80d0ca89ee1f51c1781b3f79cdb25d5 (patch) | |
| tree | fe4dfcaafe847b71ebd040f348c0a2ee8206b38a /drivers/s390 | |
| parent | d3b88655c0a157c11370b8faf50e82ecb1c17d54 (diff) | |
| parent | 4e4ced93794acb42adb19484132966defba8f3a6 (diff) | |
| download | linux-f6d2b802f80d0ca89ee1f51c1781b3f79cdb25d5.tar.gz linux-f6d2b802f80d0ca89ee1f51c1781b3f79cdb25d5.tar.bz2 linux-f6d2b802f80d0ca89ee1f51c1781b3f79cdb25d5.zip | |
Merge branch 'for-5.7/libnvdimm' into libnvdimm-for-next
- Introduce 'zero_page_range' as a dax operation. This facilitates
filesystem-dax operation without a block-device.
- Advertise a persistence-domain for of_pmem and papr_scm. The
persistence domain indicates where cpu-store cycles need to reach in
the platform-memory subsystem before the platform will consider them
power-fail protected.
- Fixup some flexible-array declarations.
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/block/dcssblk.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index 63502ca537eb..9b05cf1a25c4 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -57,11 +57,26 @@ static size_t dcssblk_dax_copy_to_iter(struct dax_device *dax_dev, return copy_to_iter(addr, bytes, i); } +static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev, + pgoff_t pgoff, size_t nr_pages) +{ + long rc; + void *kaddr; + + rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL); + if (rc < 0) + return rc; + memset(kaddr, 0, nr_pages << PAGE_SHIFT); + dax_flush(dax_dev, kaddr, nr_pages << PAGE_SHIFT); + return 0; +} + static const struct dax_operations dcssblk_dax_ops = { .direct_access = dcssblk_dax_direct_access, .dax_supported = generic_fsdax_supported, .copy_from_iter = dcssblk_dax_copy_from_iter, .copy_to_iter = dcssblk_dax_copy_to_iter, + .zero_page_range = dcssblk_dax_zero_page_range, }; struct dcssblk_dev_info { @@ -680,8 +695,9 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char dev_info->dax_dev = alloc_dax(dev_info, dev_info->gd->disk_name, &dcssblk_dax_ops, DAXDEV_F_SYNC); - if (!dev_info->dax_dev) { - rc = -ENOMEM; + if (IS_ERR(dev_info->dax_dev)) { + rc = PTR_ERR(dev_info->dax_dev); + dev_info->dax_dev = NULL; goto put_dev; } |