From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Sat, 3 Sep 2005 22:58:04 +0000 (-0700)
Subject: [PATCH] s390: compat system calls
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c563077e526d130b8c9aab4e75116551eb5fdc2d;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

[PATCH] s390: compat system calls

Use TIF bit to tell if a process is running in 31 bit mode instead of checking
the addressing mode bits of the PSW.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 5db5976ff59..fb77b72ab26 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -214,8 +214,8 @@ sysc_nr_ok:
 sysc_do_restart:
 	larl    %r10,sys_call_table
 #ifdef CONFIG_S390_SUPPORT
-        tm      SP_PSW+3(%r15),0x01  # are we running in 31 bit mode ?
-        jo      sysc_noemu
+	tm	__TI_flags+5(%r9),(_TIF_31BIT>>16)  # running in 31 bit mode ?
+	jno	sysc_noemu
 	larl    %r10,sys_call_table_emu  # use 31 bit emulation system calls
 sysc_noemu:
 #endif