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Add some basic sanity-check tests for the fat_checksum() function and
the fat_time_unix2fat() and fat_time_fat2unix() functions. These unit
tests verify these functions return correct output for a number of test
inputs.These tests were inspired by -- and serve a similar purpose to -- the
timestamp parsing KUnit tests in ext4[1].Note that, unlike fat_time_unix2fat, fat_time_fat2unix wasn't previously
exported, so this patch exports it as well. This is required for the
case where we're building the fat and fat_test as modules.Fixed minor checkpatch coding style errors and typos in commit log:
Shuah Khan[1]:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/ext4/inode-test.cSigned-off-by: David Gow
Acked-by: OGAWA Hirofumi
Reviewed-by: Brendan Higgins
Tested-by: Daniel Latypov
Signed-off-by: Shuah Khan