[S390] Introduce user_regset accessors for s390

Add the user_regset definitions for normal and compat processes, replace
the dump_regs core dump cruft with the generic CORE_DUMP_USER_REGSET and
replace binfmt_elf32.c with the generic compat_binfmt_elf.c implementation.

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

1 files changed, 11 insertions, 3 deletions

diff --git a/include/asm-s390/processor.h b/include/asm-s390/processor.h
index a00f79dd323b..5483c28b8bc3 100644
--- a/include/asm-s390/processor.h
+++ b/include/asm-s390/processor.h
@@ -143,11 +143,19 @@ struct stack_frame {
 /*
  * Do necessary setup to start up a new thread.
  */
-#define start_thread(regs, new_psw, new_stackp) do {            \
+#define start_thread(regs, new_psw, new_stackp) do {            \
         set_fs(USER_DS);                                        \
         regs->psw.mask  = psw_user_bits;                        \
-        regs->psw.addr  = new_psw | PSW_ADDR_AMODE;             \
-        regs->gprs[15]  = new_stackp ;                          \
+        regs->psw.addr  = new_psw | PSW_ADDR_AMODE;             \
+        regs->gprs[15]  = new_stackp;                           \
+} while (0)
+
+#define start_thread31(regs, new_psw, new_stackp) do {          \
+        set_fs(USER_DS);                                        \
+        regs->psw.mask  = psw_user32_bits;                      \
+        regs->psw.addr  = new_psw | PSW_ADDR_AMODE;             \
+        regs->gprs[15]  = new_stackp;                           \
+        crst_table_downgrade(current->mm, 1UL << 31);           \
 } while (0)
 
 /* Forward declaration, a strange C thing */