From 23daba8bb97ff4291447e54859ed759cfe07975e Mon Sep 17 00:00:00 2001
From: Kairui Song <kasong@redhat.com>
Date: Wed, 29 Jan 2020 10:48:27 +0800
Subject: [PATCH] kexec-tools: Remove duplicated variable declarations

When building kexec-tools for Fedora 32, following error is observed:

/usr/bin/ld: kexec/arch/x86_64/kexec-bzImage64.o:(.bss+0x0): multiple definition of `bzImage_support_efi_boot';
kexec/arch/i386/kexec-bzImage.o:(.bss+0x0): first defined here

/builddir/build/BUILD/kexec-tools-2.0.20/kexec/arch/arm/../../fs2dt.h:33: multiple definition of `my_debug';
kexec/fs2dt.o:/builddir/build/BUILD/kexec-tools-2.0.20/kexec/fs2dt.h:33: first defined here

/builddir/build/BUILD/kexec-tools-2.0.20/kexec/arch/arm64/kexec-arm64.h:68: multiple definition of `arm64_mem';
kexec/fs2dt.o:/builddir/build/BUILD/kexec-tools-2.0.20/././kexec/arch/arm64/kexec-arm64.h:68: first defined here

/builddir/build/BUILD/kexec-tools-2.0.20/kexec/arch/arm64/kexec-arm64.h:54: multiple definition of `initrd_size';
kexec/fs2dt.o:/builddir/build/BUILD/kexec-tools-2.0.20/././kexec/arch/arm64/kexec-arm64.h:54: first defined here

/builddir/build/BUILD/kexec-tools-2.0.20/kexec/arch/arm64/kexec-arm64.h:53: multiple definition of `initrd_base';
kexec/fs2dt.o:/builddir/build/BUILD/kexec-tools-2.0.20/././kexec/arch/arm64/kexec-arm64.h:53: first defined here

And apparently, these variables are wrongly declared multiple times. So
remove duplicated declaration.

Signed-off-by: Kairui Song <kasong@redhat.com>
---
 kexec/arch/arm64/kexec-arm64.h      | 6 +++---
 kexec/arch/ppc64/kexec-elf-ppc64.c  | 2 --
 kexec/arch/x86_64/kexec-bzImage64.c | 1 -
 kexec/fs2dt.h                       | 2 +-
 4 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/kexec/arch/arm64/kexec-arm64.h b/kexec/arch/arm64/kexec-arm64.h
index 628de79..ed447ac 100644
--- a/kexec/arch/arm64/kexec-arm64.h
+++ b/kexec/arch/arm64/kexec-arm64.h
@@ -50,8 +50,8 @@ int zImage_arm64_load(int argc, char **argv, const char *kernel_buf,
 void zImage_arm64_usage(void);
 
 
-off_t initrd_base;
-off_t initrd_size;
+extern off_t initrd_base;
+extern off_t initrd_size;
 
 /**
  * struct arm64_mem - Memory layout info.
@@ -65,7 +65,7 @@ struct arm64_mem {
 };
 
 #define arm64_mem_ngv UINT64_MAX
-struct arm64_mem arm64_mem;
+extern struct arm64_mem arm64_mem;
 
 uint64_t get_phys_offset(void);
 uint64_t get_vp_offset(void);
diff --git a/kexec/arch/ppc64/kexec-elf-ppc64.c b/kexec/arch/ppc64/kexec-elf-ppc64.c
index 3510b70..695b8b0 100644
--- a/kexec/arch/ppc64/kexec-elf-ppc64.c
+++ b/kexec/arch/ppc64/kexec-elf-ppc64.c
@@ -44,8 +44,6 @@
 uint64_t initrd_base, initrd_size;
 unsigned char reuse_initrd = 0;
 const char *ramdisk;
-/* Used for enabling printing message from purgatory code */
-int my_debug = 0;
 
 int elf_ppc64_probe(const char *buf, off_t len)
 {
diff --git a/kexec/arch/x86_64/kexec-bzImage64.c b/kexec/arch/x86_64/kexec-bzImage64.c
index 8edb3e4..ba8dc48 100644
--- a/kexec/arch/x86_64/kexec-bzImage64.c
+++ b/kexec/arch/x86_64/kexec-bzImage64.c
@@ -42,7 +42,6 @@
 #include <arch/options.h>
 
 static const int probe_debug = 0;
-int bzImage_support_efi_boot;
 
 int bzImage64_probe(const char *buf, off_t len)
 {
diff --git a/kexec/fs2dt.h b/kexec/fs2dt.h
index 7633273..fe24931 100644
--- a/kexec/fs2dt.h
+++ b/kexec/fs2dt.h
@@ -30,7 +30,7 @@ extern struct bootblock bb[1];
 
 /* Used for enabling printing message from purgatory code
  * Only has implemented for PPC64 */
-int my_debug;
+extern int my_debug;
 extern int dt_no_old_root;
 
 void reserve(unsigned long long where, unsigned long long length);
-- 
2.24.1

