s390: remove 31 bit support

Remove the 31 bit support in order to reduce maintenance cost and
effectively remove dead code. Since a couple of years there is no
distribution left that comes with a 31 bit kernel.

The 31 bit kernel also has been broken since more than a year before
anybody noticed. In addition I added a removal warning to the kernel
shown at ipl for 5 minutes: a960062e5826 ("s390: add 31 bit warning
message") which let everybody know about the plan to remove 31 bit
code. We didn't get any response.

Given that the last 31 bit only machine was introduced in 1999 let's
remove the code.
Anybody with 31 bit user space code can still use the compat mode.

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

1 files changed, 0 insertions, 10 deletions

diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index b3ae6f70c6d6..7fec60cb0b75 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -106,7 +106,6 @@ static void store_sigregs(void)
 {
 	save_access_regs(current->thread.acrs);
 	save_fp_ctl(&current->thread.fp_regs.fpc);
-#ifdef CONFIG_64BIT
 	if (current->thread.vxrs) {
 		int i;
 
@@ -115,7 +114,6 @@ static void store_sigregs(void)
 			current->thread.fp_regs.fprs[i] =
 				*(freg_t *)(current->thread.vxrs + i);
 	} else
-#endif
 		save_fp_regs(current->thread.fp_regs.fprs);
 }
 
@@ -124,7 +122,6 @@ static void load_sigregs(void)
 {
 	restore_access_regs(current->thread.acrs);
 	/* restore_fp_ctl is done in restore_sigregs */
-#ifdef CONFIG_64BIT
 	if (current->thread.vxrs) {
 		int i;
 
@@ -133,7 +130,6 @@ static void load_sigregs(void)
 				current->thread.fp_regs.fprs[i];
 		restore_vx_regs(current->thread.vxrs);
 	} else
-#endif
 		restore_fp_regs(current->thread.fp_regs.fprs);
 }
 
@@ -200,7 +196,6 @@ static int restore_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
 static int save_sigregs_ext(struct pt_regs *regs,
 			    _sigregs_ext __user *sregs_ext)
 {
-#ifdef CONFIG_64BIT
 	__u64 vxrs[__NUM_VXRS_LOW];
 	int i;
 
@@ -215,14 +210,12 @@ static int save_sigregs_ext(struct pt_regs *regs,
 				   sizeof(sregs_ext->vxrs_high)))
 			return -EFAULT;
 	}
-#endif
 	return 0;
 }
 
 static int restore_sigregs_ext(struct pt_regs *regs,
 			       _sigregs_ext __user *sregs_ext)
 {
-#ifdef CONFIG_64BIT
 	__u64 vxrs[__NUM_VXRS_LOW];
 	int i;
 
@@ -237,7 +230,6 @@ static int restore_sigregs_ext(struct pt_regs *regs,
 		for (i = 0; i < __NUM_VXRS_LOW; i++)
 			*((__u64 *)(current->thread.vxrs + i) + 1) = vxrs[i];
 	}
-#endif
 	return 0;
 }
 
@@ -416,13 +408,11 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
 	 * included in the signal frame on a 31-bit system.
 	 */
 	uc_flags = 0;
-#ifdef CONFIG_64BIT
 	if (MACHINE_HAS_VX) {
 		frame_size += sizeof(_sigregs_ext);
 		if (current->thread.vxrs)
 			uc_flags |= UC_VXRS;
 	}
-#endif
 	frame = get_sigframe(&ksig->ka, regs, frame_size);
 	if (frame == (void __user *) -1UL)
 		return -EFAULT;