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-rw-r--r--arch/x86/boot/compressed/error.c2
-rw-r--r--arch/x86/boot/compressed/error.h2
-rw-r--r--arch/x86/purgatory/purgatory.c1
3 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/boot/compressed/error.c b/arch/x86/boot/compressed/error.c
index 5313c5cb2b80..19a8251de506 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 86fe33b93715..31f9e080d61a 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 7558139920f8..aea47e793963 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");