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authorChristoph Hellwig <hch@lst.de>2017-05-11 09:01:42 +0200
committerChristoph Hellwig <hch@lst.de>2017-06-05 16:59:05 +0200
commitef40dda5bbc310f6517082c0ff002913104358cd (patch)
treeac178c2745191dd43bcd32daa1de3b5616e39bf2 /lib
parentdf33767d9fe0ca93c606cc9042df05e5045c8158 (diff)
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')
-rw-r--r--lib/uuid.c5
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};

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