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authorMasahiro Yamada <masahiroy@kernel.org>2020-06-01 14:57:12 +0900
committerMasahiro Yamada <masahiroy@kernel.org>2020-06-06 23:38:12 +0900
commit436b2ac603d58504f38041a0cd8adb5aeace992b (patch)
tree2c150062375bf949ddfe8cd1623e9cfc143fb969 /scripts/mod
parent269a535ca931b754a40dda3ab60514e68773c759 (diff)
modpost: invoke modpost only when input files are updated
Currently, the second pass of modpost is always invoked when you run 'make' or 'make modules' even if none of modules is changed. Use if_changed to invoke it only when it is necessary. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts/mod')
-rw-r--r--scripts/mod/modpost.c32
1 files changed, 21 insertions, 11 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 4a2f27d97bf1..b839c48689df 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2375,6 +2375,25 @@ static void add_srcversion(struct buffer *b, struct module *mod)
}
}
+static void write_buf(struct buffer *b, const char *fname)
+{
+ FILE *file;
+
+ file = fopen(fname, "w");
+ if (!file) {
+ perror(fname);
+ exit(1);
+ }
+ if (fwrite(b->p, 1, b->pos, file) != b->pos) {
+ perror(fname);
+ exit(1);
+ }
+ if (fclose(file) != 0) {
+ perror(fname);
+ exit(1);
+ }
+}
+
static void write_if_changed(struct buffer *b, const char *fname)
{
char *tmp;
@@ -2407,16 +2426,7 @@ static void write_if_changed(struct buffer *b, const char *fname)
close_write:
fclose(file);
write:
- file = fopen(fname, "w");
- if (!file) {
- perror(fname);
- exit(1);
- }
- if (fwrite(b->p, 1, b->pos, file) != b->pos) {
- perror(fname);
- exit(1);
- }
- fclose(file);
+ write_buf(b, fname);
}
/* parse Module.symvers file. line format:
@@ -2508,7 +2518,7 @@ static void write_dump(const char *fname)
symbol = symbol->next;
}
}
- write_if_changed(&buf, fname);
+ write_buf(&buf, fname);
free(buf.p);
}