of/unittest: breadcrumbs to reduce pain of future maintainers

Fix warnings pointed out by checkpatch.

Checkpatch warns: externs should be avoided in .c files

Reducing pain for future maintainers - adding a comment so that anyone trying
to find where the extern data is created will be able to find it.
(grep will not find that location)

Signed-off-by: Frank Rowand <frank.rowand@sonymobile.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 9ecf8529fe29..9e4e401ff21d 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -878,6 +878,10 @@ static int __init selftest_data_add(void)
 {
         void *selftest_data;
         struct device_node *selftest_data_node, *np;
+        /*
+         * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
+         * created by cmd_dt_S_dtb in scripts/Makefile.lib
+         */
         extern uint8_t __dtb_testcases_begin[];
         extern uint8_t __dtb_testcases_end[];
         const int size = __dtb_testcases_end - __dtb_testcases_begin;