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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 /lib/uuid.c | |
| parent | df33767d9fe0ca93c606cc9042df05e5045c8158 (diff) | |
| download | lwn-ef40dda5bbc310f6517082c0ff002913104358cd.tar.gz lwn-ef40dda5bbc310f6517082c0ff002913104358cd.zip | |
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 'lib/uuid.c')
| -rw-r--r-- | lib/uuid.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/uuid.c b/lib/uuid.c index f7116ed88e01..680b9fb9ba09 100644 --- a/lib/uuid.c +++ b/lib/uuid.c @@ -21,6 +21,11 @@ #include <linux/uuid.h> #include <linux/random.h> +const guid_t guid_null; +EXPORT_SYMBOL(guid_null); +const uuid_t uuid_null; +EXPORT_SYMBOL(uuid_null); + const u8 guid_index[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15}; const u8 uuid_index[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; |