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fixdep: fix CONFIG_IS_ENABLED etc. handling

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When fixdep detects CONFIG_IS_ENABLED and other similar macros, it must
parse the macro parameter to determine which actual CONFIG_ option is
being referenced. This involves moving a pointer forward through the
entire CONFIG_ option "word". Currently, the code uses variable q to walk
through the word, but doesn't actually initialize it to point at the
parameter before doing so. Consequently, the walking process immediately
fails since it sees the macro invocatoins's ( rather than the expected
alpha-numeric characters in the macro parameter. Fix this by adding the
missing initialization.

Fixes: 67f2ee86cc ("kbuild: fixdep: Resync this with v4.17")
Fixes: 7012865e96 ("gpio: fix test.py for gpio label lookup")
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Stephen Warren 2020-07-08 15:45:56 -06:00 committed by Tom Rini
parent dd85dc55eb
commit 76ae74d348
1 changed files with 1 additions and 0 deletions
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scripts/basic/fixdep.c
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@ -266,6 +266,7 @@ static void parse_config_file(const char *p)
(q - p == 9 && !memcmp(p, "IS_MODULE(", 10)) ||
(q - p == 3 && !memcmp(p, "VAL(", 4))) {
p = q + 1;
q = p;
while (isalnum(*q) || *q == '_')
q++;
r = q;