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fixdep: remove some false CONFIG_ matches

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The string CONFIG_ quite often appears after other alphanumerics,
meaning that that instance cannot be referencing a Kconfig
symbol. Omitting these means make has fewer files to stat() when
deciding what needs to be rebuilt - for a defconfig build, this seems to
remove about 2% of the (wildcard ...) lines from the .o.cmd files.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Rasmus Villemoes 2018-02-28 20:17:36 +01:00 committed by Masahiro Yamada
parent 14a596a7e6
commit 5b8ad96d1a
1 changed files with 5 additions and 0 deletions
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5
scripts/basic/fixdep.c
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@ -225,8 +225,13 @@ static int str_ends_with(const char *s, int slen, const char *sub)
static void parse_config_file(const char *p)
{
const char *q, *r;
const char *start = p;
while ((p = strstr(p, "CONFIG_"))) {
if (p > start && (isalnum(p[-1]) || p[-1] == '_')) {
p += 7;
continue;
}
p += 7;
q = p;
while (*q && (isalnum(*q) || *q == '_'))