linux-kernel - [PATCH 01/17] kexec_file: Silence compile warnings

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Date:   Mon, 12 Feb 2018 11:07:38 +0100
From:   Philipp Rudo <prudo@...ux.vnet.ibm.com>
To:     kexec@...ts.infradead.org, linux-s390@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Eric Biederman <ebiederm@...ssion.com>,
        Vivek Goyal <vgoyal@...hat.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Thiago Jung Bauermann <bauerman@...ux.vnet.ibm.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>, x86@...nel.org
Subject: [PATCH 01/17] kexec_file: Silence compile warnings

When building the kernel with CONFIG_KEXEC_FILE enabled gcc prints a
compile warning multiple times.

In file included from <path>/linux/init/initramfs.c:526:0:
<path>/include/linux/kexec.h:120:9: warning: ‘struct kimage’ declared inside parameter list [enabled by default]
         unsigned long cmdline_len);
         ^
This is because the typedefs for kexec_file_load uses struct kimage before
it is declared. Fix this by simply forward declaring struct kimage.

Signed-off-by: Philipp Rudo <prudo@...ux.vnet.ibm.com>
---
 include/linux/kexec.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index f16f6ceb3875..7bae5e87bf0d 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -114,6 +114,8 @@ struct purgatory_info {
 	unsigned long purgatory_load_addr;
 };
 
+struct kimage;
+
 typedef int (kexec_probe_t)(const char *kernel_buf, unsigned long kernel_size);
 typedef void *(kexec_load_t)(struct kimage *image, char *kernel_buf,
 			     unsigned long kernel_len, char *initrd,
-- 
2.13.5