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authorRasmus Villemoes <linux@rasmusvillemoes.dk>2018-02-28 22:17:36 +0300
committerMasahiro Yamada <yamada.masahiro@socionext.com>2018-03-05 17:48:25 +0300
commit5b8ad96d1a4421ffe417e647a65064aad1e84fb4 (patch)
tree23aff2c1cc0a91d53ca8f15ee7b1dffba3217b9a /scripts/basic
parent14a596a7e6fd9c5baa6b2cfc57962e2c3bda6c69 (diff)
downloadlinux-5b8ad96d1a4421ffe417e647a65064aad1e84fb4.tar.xz
fixdep: remove some false CONFIG_ matches
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>
Diffstat (limited to 'scripts/basic')
-rw-r--r--scripts/basic/fixdep.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index d7fbe545dd5d..1b21870d6e7f 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -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 == '_'))