[tip:x86/microcode] lib/cpio: Make find_cpio_data()'s offset arg optional

[tip-bot for Borislav Petkov]

Commit-ID:  7557933e6b99d381c19b196901ed537b00f6d121
Gitweb:     http://git.kernel.org/tip/7557933e6b99d381c19b196901ed537b00f6d121
Author:     Borislav Petkov <bp@xxxxxxx>
AuthorDate: Mon, 6 Jun 2016 17:10:44 +0200
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 8 Jun 2016 11:04:19 +0200

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@xxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Brian Gerst <brgerst@xxxxxxxxx>
Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1465225850-7352-4-git-send-email-bp@xxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 lib/earlycpio.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/earlycpio.c b/lib/earlycpio.c
index 3eb3e47..db283ba 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",