modpost: add read_text_file() and get_line() helpers

modpost uses grab_file() to open a file, but it is not suitable for
a text file because the mmap'ed file is not terminated by null byte.
Actually, I see some issues for the use of grab_file().

The new helper, read_text_file() loads the whole file content into a
malloc'ed buffer, and appends a null byte. Then, get_line() reads
each line.

To handle text files, I intend to replace as follows:

  grab_file()    -> read_text_file()
  get_new_line() -> get_line()

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index e5eace03a2b3..f4412febcd13 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -191,6 +191,8 @@ void add_moddevtable(struct buffer *buf, struct module *mod);
 void get_src_version(const char *modname, char sum[], unsigned sumlen);
 
 /* from modpost.c */
+char *read_text_file(const char *filename);
+char *get_line(char **stringp);
 void *grab_file(const char *filename, unsigned long *size);
 char* get_next_line(unsigned long *pos, void *file, unsigned long size);
 void release_file(void *file, unsigned long size);