lib/cpio: Make find_cpio_data()'s offset arg optional

Some callers don't use it so make it optional.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1465225850-7352-4-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/earlycpio.c b/lib/earlycpio.c
index 3eb3e4722b8e..db283ba4d2c1 100644
--- a/lib/earlycpio.c
+++ b/lib/earlycpio.c
@@ -125,7 +125,10 @@ struct cpio_data find_cpio_data(const char *path, void *data,
                 if ((ch[C_MODE] & 0170000) == 0100000 &&
                     ch[C_NAMESIZE] >= mypathsize &&
                     !memcmp(p, path, mypathsize)) {
-                        *nextoff = (long)nptr - (long)data;
+
+                        if (nextoff)
+                                *nextoff = (long)nptr - (long)data;
+
                         if (ch[C_NAMESIZE] - mypathsize >= MAX_CPIO_FILE_NAME) {
                                 pr_warn(
                                 "File %s exceeding MAX_CPIO_FILE_NAME [%d]\n",