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| author | Christoph Hellwig <hch@lst.de> | 2017-05-11 09:01:42 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-06-05 16:59:05 +0200 |
| commit | ef40dda5bbc310f6517082c0ff002913104358cd (patch) | |
| tree | ac178c2745191dd43bcd32daa1de3b5616e39bf2 /drivers/nvdimm | |
| parent | df33767d9fe0ca93c606cc9042df05e5045c8158 (diff) | |
| download | linux-0-day-ef40dda5bbc310f6517082c0ff002913104358cd.tar.gz linux-0-day-ef40dda5bbc310f6517082c0ff002913104358cd.tar.xz | |
uuid: hoist uuid_is_null() helper from libnvdimm
Hoist the libnvdimm helper as an inline helper to linux/uuid.h
using an auxiliary const variable uuid_null in lib/uuid.c.
[hch: also add the guid variant. Both do the same but I'd like
to keep casts to a minimum]
The common helper uses the new abstract type uuid_t * instead of
u8 *.
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
[hch: added guid_is_null]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/nvdimm')
| -rw-r--r-- | drivers/nvdimm/btt_devs.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/drivers/nvdimm/btt_devs.c b/drivers/nvdimm/btt_devs.c index ae00dc0d97917..4c989bb9a8a03 100644 --- a/drivers/nvdimm/btt_devs.c +++ b/drivers/nvdimm/btt_devs.c @@ -222,13 +222,6 @@ struct device *nd_btt_create(struct nd_region *nd_region) return dev; } -static bool uuid_is_null(u8 *uuid) -{ - static const u8 null_uuid[16]; - - return (memcmp(uuid, null_uuid, 16) == 0); -} - /** * nd_btt_arena_is_valid - check if the metadata layout is valid * @nd_btt: device with BTT geometry and backing device info @@ -249,7 +242,7 @@ bool nd_btt_arena_is_valid(struct nd_btt *nd_btt, struct btt_sb *super) if (memcmp(super->signature, BTT_SIG, BTT_SIG_LEN) != 0) return false; - if (!uuid_is_null(super->parent_uuid)) + if (!guid_is_null((guid_t *)&super->parent_uuid)) if (memcmp(super->parent_uuid, parent_uuid, 16) != 0) return false; |