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block: pmem: Add dependency on HAS_IOMEM 

Not all architectures have io memory.

Fixes:
drivers/block/pmem.c: In function ‘pmem_alloc’:
drivers/block/pmem.c:146:2: error: implicit declaration of function ‘ioremap_nocache’ [-Werror=implicit-function-declaration]
  pmem->virt_addr = ioremap_nocache(pmem->phys_addr, pmem->size);
  ^
drivers/block/pmem.c:146:18: warning: assignment makes pointer from integer without a cast [enabled by default]
  pmem->virt_addr = ioremap_nocache(pmem->phys_addr, pmem->size);
                  ^
drivers/block/pmem.c:182:2: error: implicit declaration of function ‘iounmap’ [-Werror=implicit-function-declaration]
  iounmap(pmem->virt_addr);
  ^

Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Richard Weinberger 2015-05-04 20:58:57 +02:00 committed by Jens Axboe
parent 4d66e5e9b6
commit b6f2098fb7
1 changed files with 1 additions and 0 deletions
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1
drivers/block/Kconfig
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@ -406,6 +406,7 @@ config BLK_DEV_RAM_DAX
config BLK_DEV_PMEM
tristate "Persistent memory block device support"
depends on HAS_IOMEM
help
Saying Y here will allow you to use a contiguous range of reserved
memory as one or more persistent block devices.