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| author | Dan Williams <dan.j.williams@intel.com> | 2018-03-29 17:22:13 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2018-04-03 05:41:19 -0700 |
| commit | 976431b02c2ef92ae3f8b6a7d699fc554025e118 (patch) | |
| tree | e05121a5ccc869096a1732847f92e4b485106336 /drivers/md/dm-stripe.c | |
| parent | 2080e88aecd78773eacbe7d6b9d59968000ba55a (diff) | |
| download | blackbird-op-linux-976431b02c2ef92ae3f8b6a7d699fc554025e118.tar.gz blackbird-op-linux-976431b02c2ef92ae3f8b6a7d699fc554025e118.zip | |
dax, dm: allow device-mapper to operate without dax support
Change device-mapper's DAX dependency to require the presence of at
least one DAX_DRIVER. This allows device-mapper to be built without
bringing the DAX core along which is especially wasteful when there are
no DAX drivers, like BLK_DEV_PMEM, configured.
Cc: Alasdair Kergon <agk@redhat.com>
Reported-by: Bart Van Assche <Bart.VanAssche@wdc.com>
Reported-by: kbuild test robot <lkp@intel.com>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/md/dm-stripe.c')
| -rw-r--r-- | drivers/md/dm-stripe.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index b5e892149c54..ac2e8ee9d586 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -311,6 +311,7 @@ static int stripe_map(struct dm_target *ti, struct bio *bio) return DM_MAPIO_REMAPPED; } +#if IS_ENABLED(CONFIG_DAX_DRIVER) static long stripe_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn) { @@ -351,6 +352,11 @@ static size_t stripe_dax_copy_from_iter(struct dm_target *ti, pgoff_t pgoff, return dax_copy_from_iter(dax_dev, pgoff, addr, bytes, i); } +#else +#define stripe_dax_direct_access NULL +#define stripe_dax_copy_from_iter NULL +#endif + /* * Stripe status: * |
