do_header() is called for each cpio entry and first checks for "newc"
magic before parsing further. The magic check includes a special case
error message if POSIX.1 ASCII (cpio -H odc) magic is detected. This
special case POSIX.1 check needn't be done in the hot path, so move it
under the non-newc-magic error path.
Signed-off-by: David Disseldorp <ddiss@xxxxxxx>
---
init/initramfs.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/init/initramfs.c b/init/initramfs.c
index af27abc59643..f01590cefa2d 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -256,12 +256,11 @@ static int __init do_collect(void)
static int __init do_header(void)
{
- if (memcmp(collected, "070707", 6)==0) {
- error("incorrect cpio method used: use -H newc option");
- return 1;
- }
if (memcmp(collected, "070701", 6)) {
- error("no cpio magic");
+ if (memcmp(collected, "070707", 6) == 0)
+ error("incorrect cpio method used: use -H newc option");
+ else
+ error("no cpio magic");
return 1;
}
parse_header(collected);
--
2.26.2
