The quilt patch titled Subject: decompressor: provide missing prototypes has been removed from the -mm tree. Its filename was decompressor-provide-missing-prototypes.patch This patch was dropped because it was merged into the mm-nonmm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Arnd Bergmann <arnd@xxxxxxxx> Subject: decompressor: provide missing prototypes Date: Wed, 17 May 2023 15:19:31 +0200 The entry points for the decompressor don't always have a prototype included in the .c file: lib/decompress_inflate.c:42:17: error: no previous prototype for '__gunzip' [-Werror=missing-prototypes] lib/decompress_unxz.c:251:17: error: no previous prototype for 'unxz' [-Werror=missing-prototypes] lib/decompress_unzstd.c:331:17: error: no previous prototype for 'unzstd' [-Werror=missing-prototypes] Include the correct headers for unxz and unzstd, and mark the inflate function above as unconditionally 'static' to avoid these warnings. Link: https://lkml.kernel.org/r/20230517131936.936840-1-arnd@xxxxxxxxxx Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Cc: Nick Terrell <terrelln@xxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- lib/decompress_inflate.c | 2 +- lib/decompress_unxz.c | 2 ++ lib/decompress_unzstd.c | 2 ++ 3 files changed, 5 insertions(+), 1 deletion(-) --- a/lib/decompress_inflate.c~decompressor-provide-missing-prototypes +++ a/lib/decompress_inflate.c @@ -39,7 +39,7 @@ static long INIT nofill(void *buffer, un } /* Included from initramfs et al code */ -STATIC int INIT __gunzip(unsigned char *buf, long len, +static int INIT __gunzip(unsigned char *buf, long len, long (*fill)(void*, unsigned long), long (*flush)(void*, unsigned long), unsigned char *out_buf, long out_len, --- a/lib/decompress_unxz.c~decompressor-provide-missing-prototypes +++ a/lib/decompress_unxz.c @@ -102,6 +102,8 @@ */ #ifdef STATIC # define XZ_PREBOOT +#else +#include <linux/decompress/unxz.h> #endif #ifdef __KERNEL__ # include <linux/decompress/mm.h> --- a/lib/decompress_unzstd.c~decompressor-provide-missing-prototypes +++ a/lib/decompress_unzstd.c @@ -69,6 +69,8 @@ # define UNZSTD_PREBOOT # include "xxhash.c" # include "zstd/decompress_sources.h" +#else +#include <linux/decompress/unzstd.h> #endif #include <linux/decompress/mm.h> _ Patches currently in -mm which might be from arnd@xxxxxxxx are syscalls-add-sys_ni_posix_timers-prototype.patch