[tip: x86/cleanups] x86/purgatory: Include header for warn() declaration

tip-bot2 for Arnd Bergmann
2023-08-03T15:59:26Z

The following commit has been merged into the x86/cleanups branch of tip:

Commit-ID: 6d33531bc0234332572ae612232d947f353a4450
Gitweb: https://git.kernel.org/tip/6d33531bc0234332572ae612232d947f353a4450
Author: Arnd Bergmann <arnd@arndb.de>
AuthorDate: Thu, 03 Aug 2023 10:26:16 +02:00
Committer: Borislav Petkov (AMD) <bp@alien8.de>
CommitterDate: Thu, 03 Aug 2023 16:37:18 +02:00

x86/purgatory: Include header for warn() declaration

The purgatory code uses parts of the decompressor and provides its own
warn() function, but has to include the corresponding header file to
avoid a -Wmissing-prototypes warning.

It turns out that this function prototype actually differs from the
declaration, so change it to get a constant pointer in the declaration
and the other definition as well.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20230803082619.1369127-5-arnd@kernel.org
---
arch/x86/boot/compressed/error.c | 2 +-
arch/x86/boot/compressed/error.h | 2 +-
arch/x86/purgatory/purgatory.c | 1 +
3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/boot/compressed/error.c b/arch/x86/boot/compressed/error.c
index 5313c5c..19a8251 100644
--- a/arch/x86/boot/compressed/error.c
+++ b/arch/x86/boot/compressed/error.c
@@ -7,7 +7,7 @@
#include "misc.h"
#include "error.h"

-void warn(char *m)
+void warn(const char *m)
{
error_putstr("\n\n");
error_putstr(m);
diff --git a/arch/x86/boot/compressed/error.h b/arch/x86/boot/compressed/error.h
index 86fe33b..31f9e08 100644
--- a/arch/x86/boot/compressed/error.h
+++ b/arch/x86/boot/compressed/error.h
@@ -4,7 +4,7 @@

#include <linux/compiler.h>

-void warn(char *m);
+void warn(const char *m);
void error(char *m) __noreturn;
void panic(const char *fmt, ...) __noreturn __cold;

diff --git a/arch/x86/purgatory/purgatory.c b/arch/x86/purgatory/purgatory.c
index 7558139..aea47e7 100644
--- a/arch/x86/purgatory/purgatory.c
+++ b/arch/x86/purgatory/purgatory.c
@@ -14,6 +14,7 @@
#include <crypto/sha2.h>
#include <asm/purgatory.h>

+#include "../boot/compressed/error.h"
#include "../boot/string.h"

u8 purgatory_sha256_digest[SHA256_DIGEST_SIZE] __section(".kexec-purgatory");