[PATCH V2 5/6] riscv: elf_kexec: Fixup compile warning

[guoren@xxxxxxxxxx]

From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>

COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1
O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/

../arch/riscv/kernel/elf_kexec.c: In function 'elf_kexec_load':
../arch/riscv/kernel/elf_kexec.c:185:23: warning: variable
'kernel_start' set but not used [-Wunused-but-set-variable]
  185 |         unsigned long kernel_start;
      |                       ^~~~~~~~~~~~

Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
Signed-off-by: Guo Ren <guoren@xxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
---
 arch/riscv/kernel/elf_kexec.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/riscv/kernel/elf_kexec.c b/arch/riscv/kernel/elf_kexec.c
index 0cb94992c15b..bba3723a0914 100644
--- a/arch/riscv/kernel/elf_kexec.c
+++ b/arch/riscv/kernel/elf_kexec.c
@@ -182,7 +182,9 @@ static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
 	unsigned long new_kernel_pbase = 0UL;
 	unsigned long initrd_pbase = 0UL;
 	unsigned long headers_sz;
+#ifdef CONFIG_ARCH_HAS_KEXEC_PURGATORY
 	unsigned long kernel_start;
+#endif /* CONFIG_ARCH_HAS_KEXEC_PURGATORY */
 	void *fdt, *headers;
 	struct elfhdr ehdr;
 	struct kexec_buf kbuf;
@@ -197,7 +199,9 @@ static void *elf_kexec_load(struct kimage *image, char *kernel_buf,
 			     &old_kernel_pbase, &new_kernel_pbase);
 	if (ret)
 		goto out;
+#ifdef CONFIG_ARCH_HAS_KEXEC_PURGATORY
 	kernel_start = image->start;
+#endif /* CONFIG_ARCH_HAS_KEXEC_PURGATORY */
 	pr_notice("The entry point of kernel at 0x%lx\n", image->start);
 
 	/* Add the kernel binary to the image */
-- 
2.36.1