s390, crash: wrap crash dumping code into crash related ifdefs

Now crash codes under kernel/ folder has been split out from kexec
code, crash dumping can be separated from kexec reboot in config
items on s390 with some adjustments.

Here wrap up crash dumping codes with CONFIG_CRASH_DUMP ifdeffery.

Link: https://lkml.kernel.org/r/20240124051254.67105-10-bhe@redhat.com
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Hari Bathini <hbathini@linux.ibm.com>
Cc: Pingfan Liu <piliu@redhat.com>
Cc: Klara Modin <klarasmodin@gmail.com>
Cc: Michael Kelley <mhklinux@outlook.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

3 files changed, 14 insertions, 0 deletions

diff --git a/arch/s390/kernel/kexec_elf.c b/arch/s390/kernel/kexec_elf.c
index 9da6fa30c4474..4d364de437992 100644
--- a/arch/s390/kernel/kexec_elf.c
+++ b/arch/s390/kernel/kexec_elf.c
@@ -40,8 +40,10 @@ static int kexec_file_add_kernel_elf(struct kimage *image,
 		buf.bufsz = phdr->p_filesz;
 
 		buf.mem = ALIGN(phdr->p_paddr, phdr->p_align);
+#ifdef CONFIG_CRASH_DUMP
 		if (image->type == KEXEC_TYPE_CRASH)
 			buf.mem += crashk_res.start;
+#endif
 		buf.memsz = phdr->p_memsz;
 		data->memsz = ALIGN(data->memsz, phdr->p_align) + buf.memsz;
 
diff --git a/arch/s390/kernel/kexec_image.c b/arch/s390/kernel/kexec_image.c
index af23eff5774db..a32ce8bea745c 100644
--- a/arch/s390/kernel/kexec_image.c
+++ b/arch/s390/kernel/kexec_image.c
@@ -24,8 +24,10 @@ static int kexec_file_add_kernel_image(struct kimage *image,
 	buf.bufsz = image->kernel_buf_len;
 
 	buf.mem = 0;
+#ifdef CONFIG_CRASH_DUMP
 	if (image->type == KEXEC_TYPE_CRASH)
 		buf.mem += crashk_res.start;
+#endif
 	buf.memsz = buf.bufsz;
 
 	data->kernel_buf = image->kernel_buf;
diff --git a/arch/s390/kernel/machine_kexec_file.c b/arch/s390/kernel/machine_kexec_file.c
index 8d207b82d9fed..c2bac14dd668a 100644
--- a/arch/s390/kernel/machine_kexec_file.c
+++ b/arch/s390/kernel/machine_kexec_file.c
@@ -105,6 +105,7 @@ static int kexec_file_update_purgatory(struct kimage *image,
 	if (ret)
 		return ret;
 
+#ifdef CONFIG_CRASH_DUMP
 	if (image->type == KEXEC_TYPE_CRASH) {
 		u64 crash_size;
 
@@ -121,6 +122,7 @@ static int kexec_file_update_purgatory(struct kimage *image,
 						     sizeof(crash_size),
 						     false);
 	}
+#endif
 	return ret;
 }
 
@@ -134,8 +136,10 @@ static int kexec_file_add_purgatory(struct kimage *image,
 
 	data->memsz = ALIGN(data->memsz, PAGE_SIZE);
 	buf.mem = data->memsz;
+#ifdef CONFIG_CRASH_DUMP
 	if (image->type == KEXEC_TYPE_CRASH)
 		buf.mem += crashk_res.start;
+#endif
 
 	ret = kexec_load_purgatory(image, &buf);
 	if (ret)
@@ -158,8 +162,10 @@ static int kexec_file_add_initrd(struct kimage *image,
 
 	data->memsz = ALIGN(data->memsz, PAGE_SIZE);
 	buf.mem = data->memsz;
+#ifdef CONFIG_CRASH_DUMP
 	if (image->type == KEXEC_TYPE_CRASH)
 		buf.mem += crashk_res.start;
+#endif
 	buf.memsz = buf.bufsz;
 
 	data->parm->initrd_start = data->memsz;
@@ -223,8 +229,10 @@ static int kexec_file_add_ipl_report(struct kimage *image,
 		data->kernel_buf + offsetof(struct lowcore, ipl_parmblock_ptr);
 	*lc_ipl_parmblock_ptr = (__u32)buf.mem;
 
+#ifdef CONFIG_CRASH_DUMP
 	if (image->type == KEXEC_TYPE_CRASH)
 		buf.mem += crashk_res.start;
+#endif
 
 	ret = kexec_add_buffer(&buf);
 out:
@@ -268,10 +276,12 @@ void *kexec_file_add_components(struct kimage *image,
 	memcpy(data.parm->command_line, image->cmdline_buf,
 	       image->cmdline_buf_len);
 
+#ifdef CONFIG_CRASH_DUMP
 	if (image->type == KEXEC_TYPE_CRASH) {
 		data.parm->oldmem_base = crashk_res.start;
 		data.parm->oldmem_size = crashk_res.end - crashk_res.start + 1;
 	}
+#endif
 
 	if (image->initrd_buf) {
 		ret = kexec_file_add_initrd(image, &data);