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authorMasahiro Yamada <masahiroy@kernel.org>2020-06-01 08:57:20 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2020-06-06 17:38:13 +0300
commit70f30cfe5b892fcb7f98e7df72ed6ccfe3225628 (patch)
tree5c5026083bab0d89b97a1e9f33a363abd3bd162b /scripts/mod
parent7c8f5662c502b7b967399fef8a64532ec43b063d (diff)
downloadlinux-70f30cfe5b892fcb7f98e7df72ed6ccfe3225628.tar.xz
modpost: use read_text_file() and get_line() for reading text files
grab_file() mmaps a file, but it is not so efficient here because get_next_line() copies every line to the temporary buffer anyway. read_text_file() and get_line() are simpler. get_line() exploits the library function strchr(). Going forward, the missing *.symvers or *.cmd is a fatal error. This should not happen because scripts/Makefile.modpost guards the -i option files with $(wildcard $(input-symdump)). Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts/mod')
-rw-r--r--scripts/mod/modpost.c15
-rw-r--r--scripts/mod/sumversion.c16
2 files changed, 14 insertions, 17 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 0a844902998e..4fdf992e9729 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2481,15 +2481,16 @@ static void write_if_changed(struct buffer *b, const char *fname)
**/
static void read_dump(const char *fname)
{
- unsigned long size, pos = 0;
- void *file = grab_file(fname, &size);
- char *line;
+ char *buf, *pos, *line;
- if (!file)
+ buf = read_text_file(fname);
+ if (!buf)
/* No symbol versions, silently ignore */
return;
- while ((line = get_next_line(&pos, file, size))) {
+ pos = buf;
+
+ while ((line = get_line(&pos))) {
char *symname, *namespace, *modname, *d, *export;
unsigned int crc;
struct module *mod;
@@ -2524,10 +2525,10 @@ static void read_dump(const char *fname)
sym_set_crc(symname, crc);
sym_update_namespace(symname, namespace);
}
- release_file(file, size);
+ free(buf);
return;
fail:
- release_file(file, size);
+ free(buf);
fatal("parse error in symbol dump file\n");
}
diff --git a/scripts/mod/sumversion.c b/scripts/mod/sumversion.c
index 9f77c9dfce20..d587f40f1117 100644
--- a/scripts/mod/sumversion.c
+++ b/scripts/mod/sumversion.c
@@ -303,9 +303,8 @@ static int is_static_library(const char *objfile)
* to figure out source files. */
static int parse_source_files(const char *objfile, struct md4_ctx *md)
{
- char *cmd, *file, *line, *dir;
+ char *cmd, *file, *line, *dir, *pos;
const char *base;
- unsigned long flen, pos = 0;
int dirlen, ret = 0, check_files = 0;
cmd = NOFAIL(malloc(strlen(objfile) + sizeof("..cmd")));
@@ -323,14 +322,12 @@ static int parse_source_files(const char *objfile, struct md4_ctx *md)
strncpy(dir, objfile, dirlen);
dir[dirlen] = '\0';
- file = grab_file(cmd, &flen);
- if (!file) {
- warn("could not find %s for %s\n", cmd, objfile);
- goto out;
- }
+ file = read_text_file(cmd);
+
+ pos = file;
/* Sum all files in the same dir or subdirs. */
- while ((line = get_next_line(&pos, file, flen)) != NULL) {
+ while ((line = get_line(&pos))) {
char* p = line;
if (strncmp(line, "source_", sizeof("source_")-1) == 0) {
@@ -381,8 +378,7 @@ static int parse_source_files(const char *objfile, struct md4_ctx *md)
/* Everyone parsed OK */
ret = 1;
out_file:
- release_file(file, flen);
-out:
+ free(file);
free(dir);
free(cmd);
return ret;