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src/t_mmap_dio: fix incorrect argument count check

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t_mmap_dio.c actually requires 4 arguments, not 3 as the current
check enforces:

usage: t_mmap_dio <src file> <dest file> <size> <msg>
open src(No such file or directory) len 0 (null)

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Fixes: 456581661b ("xfs: test per-inode DAX flag by IO")
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
This commit is contained in:
Ross Zwisler
2017-04-24 11:49:31 -06:00
committed by Eryu Guan
parent 255affa11c
commit 47a3f8a830
1 changed files with 1 additions and 1 deletions
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src/t_mmap_dio.c
+1 -1
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@@ -39,7 +39,7 @@ int main(int argc, char **argv)
char *dfile;
unsigned long len, opt;
if (argc < 4)
if (argc < 5)
usage(basename(argv[0]));
while ((opt = getopt(argc, argv, "b")) != -1)