s390/amode31: change type of __samode31, __eamode31, etc

For consistencs reasons change the type of __samode31, __eamode31,
__stext_amode31, and __etext_amode31 to a char pointer so they
(nearly) match the type of all other sections.

This allows for code simplifications with follow-on patches.
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/include/asm/sections.h

@@ -23,7 +23,7 @@
  */
 #define __bootdata_preserved(var) __section(".boot.preserved.data." #var) var
 
-extern unsigned long __samode31, __eamode31;
-extern unsigned long __stext_amode31, __etext_amode31;
+extern char *__samode31, *__eamode31;
+extern char *__stext_amode31, *__etext_amode31;
 
 #endif

arch/s390/kernel/machine_kexec.c

@@ -216,8 +216,8 @@ void arch_crash_save_vmcoreinfo(void)
 	VMCOREINFO_SYMBOL(lowcore_ptr);
 	VMCOREINFO_SYMBOL(high_memory);
 	VMCOREINFO_LENGTH(lowcore_ptr, NR_CPUS);
-	vmcoreinfo_append_str("SAMODE31=%lx\n", __samode31);
-	vmcoreinfo_append_str("EAMODE31=%lx\n", __eamode31);
+	vmcoreinfo_append_str("SAMODE31=%lx\n", (unsigned long)__samode31);
+	vmcoreinfo_append_str("EAMODE31=%lx\n", (unsigned long)__eamode31);
 	vmcoreinfo_append_str("KERNELOFFSET=%lx\n", kaslr_offset());
 	abs_lc = get_abs_lowcore();
 	abs_lc->vmcore_info = paddr_vmcoreinfo_note();

arch/s390/kernel/setup.c

@@ -97,10 +97,10 @@ EXPORT_SYMBOL(console_irq);
  * relocated above 2 GB, because it has to use 31 bit addresses.
  * Such code and data is part of the .amode31 section.
  */
-unsigned long __amode31_ref __samode31 = (unsigned long)&_samode31;
-unsigned long __amode31_ref __eamode31 = (unsigned long)&_eamode31;
-unsigned long __amode31_ref __stext_amode31 = (unsigned long)&_stext_amode31;
-unsigned long __amode31_ref __etext_amode31 = (unsigned long)&_etext_amode31;
+char __amode31_ref *__samode31 = _samode31;
+char __amode31_ref *__eamode31 = _eamode31;
+char __amode31_ref *__stext_amode31 = _stext_amode31;
+char __amode31_ref *__etext_amode31 = _etext_amode31;
 struct exception_table_entry __amode31_ref *__start_amode31_ex_table = _start_amode31_ex_table;
 struct exception_table_entry __amode31_ref *__stop_amode31_ex_table = _stop_amode31_ex_table;
 
@@ -770,15 +770,15 @@ static void __init setup_memory(void)
 static void __init relocate_amode31_section(void)
 {
 	unsigned long amode31_size = __eamode31 - __samode31;
-	long amode31_offset = physmem_info.reserved[RR_AMODE31].start - __samode31;
-	long *ptr;
+	long amode31_offset, *ptr;
 
+	amode31_offset = physmem_info.reserved[RR_AMODE31].start - (unsigned long)__samode31;
 	pr_info("Relocating AMODE31 section of size 0x%08lx\n", amode31_size);
 
 	/* Move original AMODE31 section to the new one */
-	memmove((void *)physmem_info.reserved[RR_AMODE31].start, (void *)__samode31, amode31_size);
+	memmove((void *)physmem_info.reserved[RR_AMODE31].start, __samode31, amode31_size);
 	/* Zero out the old AMODE31 section to catch invalid accesses within it */
-	memset((void *)__samode31, 0, amode31_size);
+	memset(__samode31, 0, amode31_size);
 
 	/* Update all AMODE31 region references */
 	for (ptr = _start_amode31_refs; ptr != _end_amode31_refs; ptr++)

arch/s390/mm/dump_pagetables.c

@@ -290,8 +290,8 @@ static int pt_dump_init(void)
 	max_addr = (S390_lowcore.kernel_asce & _REGION_ENTRY_TYPE_MASK) >> 2;
 	max_addr = 1UL << (max_addr * 11 + 31);
 	address_markers[IDENTITY_AFTER_END_NR].start_address = ident_map_size;
-	address_markers[AMODE31_START_NR].start_address = __samode31;
-	address_markers[AMODE31_END_NR].start_address = __eamode31;
+	address_markers[AMODE31_START_NR].start_address = (unsigned long)__samode31;
+	address_markers[AMODE31_END_NR].start_address = (unsigned long)__eamode31;
 	address_markers[MODULES_NR].start_address = MODULES_VADDR;
 	address_markers[MODULES_END_NR].start_address = MODULES_END;
 	address_markers[ABS_LOWCORE_NR].start_address = __abs_lowcore;

arch/s390/mm/vmem.c

@@ -657,8 +657,8 @@ void __init vmem_map_init(void)
 		      (unsigned long)(__end_rodata - _etext) >> PAGE_SHIFT);
 	set_memory_rox((unsigned long)_sinittext,
 		       (unsigned long)(_einittext - _sinittext) >> PAGE_SHIFT);
-	set_memory_rox(__stext_amode31,
-		       (__etext_amode31 - __stext_amode31) >> PAGE_SHIFT);
+	set_memory_rox((unsigned long)__stext_amode31,
+		       (unsigned long)(__etext_amode31 - __stext_amode31) >> PAGE_SHIFT);
 
 	/* lowcore must be executable for LPSWE */
 	if (!static_key_enabled(&cpu_has_bear))