diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2018-03-29 17:20:39 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2018-04-03 05:41:19 -0700 |
| commit | 2080e88aecd78773eacbe7d6b9d59968000ba55a (patch) | |
| tree | 884af4d8fa7c875451df94cd82c917338992386e /drivers | |
| parent | d2c997c0f14535eff68d8ed9c2f1c5e100625751 (diff) | |
| download | linux-2080e88aecd78773eacbe7d6b9d59968000ba55a.tar.bz2 | |
dax: introduce CONFIG_DAX_DRIVER
In support of allowing device-mapper to compile out idle/dead code when
there are no dax providers in the system, introduce the DAX_DRIVER
symbol. This is selected by all leaf drivers that device-mapper might be
layered on top. This allows device-mapper to conditionally 'select DAX'
only when a provider is present.
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Reported-by: Bart Van Assche <Bart.VanAssche@wdc.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dax/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/nvdimm/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/s390/block/Kconfig | 2 |
3 files changed, 6 insertions, 3 deletions
diff --git a/drivers/dax/Kconfig b/drivers/dax/Kconfig index b79aa8f7a497..e0700bf4893a 100644 --- a/drivers/dax/Kconfig +++ b/drivers/dax/Kconfig @@ -1,3 +1,7 @@ +config DAX_DRIVER + select DAX + bool + menuconfig DAX tristate "DAX: direct access to differentiated memory" select SRCU @@ -16,7 +20,6 @@ config DEV_DAX baseline memory pool. Mappings of a /dev/daxX.Y device impose restrictions that make the mapping behavior deterministic. - config DEV_DAX_PMEM tristate "PMEM DAX: direct access to persistent memory" depends on LIBNVDIMM && NVDIMM_DAX && DEV_DAX diff --git a/drivers/nvdimm/Kconfig b/drivers/nvdimm/Kconfig index a65f2e1d9f53..40cbdb16e23e 100644 --- a/drivers/nvdimm/Kconfig +++ b/drivers/nvdimm/Kconfig @@ -20,7 +20,7 @@ if LIBNVDIMM config BLK_DEV_PMEM tristate "PMEM: Persistent memory block device support" default LIBNVDIMM - select DAX + select DAX_DRIVER select ND_BTT if BTT select ND_PFN if NVDIMM_PFN help diff --git a/drivers/s390/block/Kconfig b/drivers/s390/block/Kconfig index 1444333210c7..9ac7574e3cfb 100644 --- a/drivers/s390/block/Kconfig +++ b/drivers/s390/block/Kconfig @@ -15,8 +15,8 @@ config BLK_DEV_XPRAM config DCSSBLK def_tristate m - select DAX select FS_DAX_LIMITED + select DAX_DRIVER prompt "DCSSBLK support" depends on S390 && BLOCK help |