This can greatly aid in narrowing down the real source of initramfs problems such as failures related to the compression of the in-kernel initramfs when an external initramfs is in use as well. Existing errors are ambiguous as to which initramfs is a problem and why.
Signed-off-by: Daniel M. Weeks <d...@danweeks.net> --- init/initramfs.c | 1 + lib/decompress.c | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/init/initramfs.c b/init/initramfs.c index 93b6139..25d88b1 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -455,6 +455,7 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len) } this_header = 0; decompress = decompress_method(buf, len, &compress_name); + printk(KERN_DEBUG "Detected %s compressed data\n", compress_name); if (decompress) { res = decompress(buf, len, NULL, flush_buffer, NULL, &my_inptr, error); diff --git a/lib/decompress.c b/lib/decompress.c index 4d1cd03..fc508fd 100644 --- a/lib/decompress.c +++ b/lib/decompress.c @@ -17,6 +17,8 @@ #include <linux/string.h> #include <linux/init.h> +#include <linux/printk.h> + #ifndef CONFIG_DECOMPRESS_GZIP # define gunzip NULL #endif @@ -61,6 +63,8 @@ decompress_fn __init decompress_method(const unsigned char *inbuf, int len, if (len < 2) return NULL; /* Need at least this much... */ + printk(KERN_DEBUG "Compressed data magic: %#.2x %#.2x\n", inbuf[0], inbuf[1]); + for (cf = compressed_formats; cf->name; cf++) { if (!memcmp(inbuf, cf->magic, 2)) break; -- Daniel M. Weeks -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/