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of: fix uninitialized variable warning for overlay test

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gcc warns that an empty device tree would cause undefined behavior:

drivers/of/unittest.c: In function 'of_unittest':
drivers/of/unittest.c:2199:25: warning: 'last_sibling' may be used uninitialized in this function [-Wmaybe-uninitialized]

This adds an initialization of the variable to zero, which we handle
correctly.

Fixes: 81d0848fc8 ("of: Add unit tests for applying overlays")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Arnd Bergmann 2017-04-28 11:44:11 +02:00 committed by Rob Herring
parent 5d4dd65b1e
commit ee320b33b4
1 changed files with 1 additions and 1 deletions
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2
drivers/of/unittest.c
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@ -2192,7 +2192,7 @@ static __init void of_unittest_overlay_high_level(void)
mutex_lock(&of_mutex);
for (np = of_root->child; np; np = np->sibling)
for (last_sibling = np = of_root->child; np; np = np->sibling)
last_sibling = np;
if (last_sibling)