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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/md/dm-stripe.c | |
| parent | d3b88655c0a157c11370b8faf50e82ecb1c17d54 (diff) | |
| parent | 4e4ced93794acb42adb19484132966defba8f3a6 (diff) | |
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/md/dm-stripe.c')
| -rw-r--r-- | drivers/md/dm-stripe.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index 63bbcc20f49a..fa813c0f993d 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -360,10 +360,32 @@ static size_t stripe_dax_copy_to_iter(struct dm_target *ti, pgoff_t pgoff, return dax_copy_to_iter(dax_dev, pgoff, addr, bytes, i); } +static int stripe_dax_zero_page_range(struct dm_target *ti, pgoff_t pgoff, + size_t nr_pages) +{ + int ret; + sector_t dev_sector, sector = pgoff * PAGE_SECTORS; + struct stripe_c *sc = ti->private; + struct dax_device *dax_dev; + struct block_device *bdev; + uint32_t stripe; + + stripe_map_sector(sc, sector, &stripe, &dev_sector); + dev_sector += sc->stripe[stripe].physical_start; + dax_dev = sc->stripe[stripe].dev->dax_dev; + bdev = sc->stripe[stripe].dev->bdev; + + ret = bdev_dax_pgoff(bdev, dev_sector, nr_pages << PAGE_SHIFT, &pgoff); + if (ret) + return ret; + return dax_zero_page_range(dax_dev, pgoff, nr_pages); +} + #else #define stripe_dax_direct_access NULL #define stripe_dax_copy_from_iter NULL #define stripe_dax_copy_to_iter NULL +#define stripe_dax_zero_page_range NULL #endif /* @@ -486,6 +508,7 @@ static struct target_type stripe_target = { .direct_access = stripe_dax_direct_access, .dax_copy_from_iter = stripe_dax_copy_from_iter, .dax_copy_to_iter = stripe_dax_copy_to_iter, + .dax_zero_page_range = stripe_dax_zero_page_range, }; int __init dm_stripe_init(void) |