[S390] zfcpdump: remove cross arch dump support

Remove support to be able to dump 31 bit systems with a 64 bit dumper.
This is mostly useless since no distro ships 31 bit kernels together
with a 64 bit dumper.
We also get rid of a bit of hacky code.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

2 files changed, 11 insertions, 17 deletions

diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index c25dfac7dd76..8ed3c745cd07 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -144,7 +144,9 @@ void pgm_check_handler(void);
 void mcck_int_handler(void);
 void io_int_handler(void);
 
-struct save_area_s390 {
+#ifdef CONFIG_32BIT
+
+struct save_area {
         u32     ext_save;
         u64     timer;
         u64     clk_cmp;
@@ -158,7 +160,11 @@ struct save_area_s390 {
         u32     ctrl_regs[16];
 }  __attribute__((packed));
 
-struct save_area_s390x {
+#define SAVE_AREA_BASE offsetof(struct _lowcore, extended_save_area_addr)
+
+#else /* CONFIG_32BIT */
+
+struct save_area {
         u64     fp_regs[16];
         u64     gp_regs[16];
         u8      psw[16];
@@ -174,21 +180,9 @@ struct save_area_s390x {
         u64     ctrl_regs[16];
 }  __attribute__((packed));
 
-union save_area {
-        struct save_area_s390   s390;
-        struct save_area_s390x  s390x;
-};
-
-#define SAVE_AREA_BASE_S390     0xd4
-#define SAVE_AREA_BASE_S390X    0x1200
+#define SAVE_AREA_BASE offsetof(struct _lowcore, floating_pt_save_area)
 
-#ifndef __s390x__
-#define SAVE_AREA_SIZE sizeof(struct save_area_s390)
-#define SAVE_AREA_BASE SAVE_AREA_BASE_S390
-#else
-#define SAVE_AREA_SIZE sizeof(struct save_area_s390x)
-#define SAVE_AREA_BASE SAVE_AREA_BASE_S390X
-#endif
+#endif /* CONFIG_32BIT */
 
 #ifndef __s390x__
 #define LC_ORDER 0
diff --git a/arch/s390/include/asm/smp.h b/arch/s390/include/asm/smp.h
index 2ab1141eeb50..9d2acb0b4847 100644
--- a/arch/s390/include/asm/smp.h
+++ b/arch/s390/include/asm/smp.h
@@ -29,7 +29,7 @@ extern int smp_cpu_polarization[];
 extern void arch_send_call_function_single_ipi(int cpu);
 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
 
-extern union save_area *zfcpdump_save_areas[NR_CPUS + 1];
+extern struct save_area *zfcpdump_save_areas[NR_CPUS + 1];
 
 #endif /* CONFIG_SMP */