s390/compat: change default for CONFIG_COMPAT to "n"

31 bit support has been removed from the kernel more than eight years
ago. The last 31 bit distribution is many years older. There shouldn't be
any 31 bit code around anymore.

Therefore avoid providing an unused and only partially tested user space
interface and change the default for CONFIG_COMPAT from "yes" to "no".

Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 8f39f04247966d0b492ed378438b33d20474e99c..3408b48423ad67b74c41d69988e40fd252579498 100644 (file)
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -443,7 +443,7 @@ config COMMAND_LINE_SIZE
          line.
 
 config COMPAT
-       def_bool y
+       def_bool n
        prompt "Kernel support for 31 bit emulation"
        select ARCH_WANT_OLD_COMPAT_IPC
        select COMPAT_OLD_SIGACTION
@@ -454,7 +454,9 @@ config COMPAT
          Select this option if you want to enable your system kernel to
          handle system-calls from ELF binaries for 31 bit ESA.  This option
          (and some other stuff like libraries and such) is needed for
-         executing 31 bit applications.  It is safe to say "Y".
+         executing 31 bit applications.
+
+         If unsure say N.
 
 config SMP
        def_bool y

diff --git a/arch/s390/configs/zfcpdump_defconfig b/arch/s390/configs/zfcpdump_defconfig
index 47028450eee157b5b100e82b590dde720555c173..30d2a16876650e9c3ea32997f771131e6372e2fc 100644 (file)
--- a/arch/s390/configs/zfcpdump_defconfig
+++ b/arch/s390/configs/zfcpdump_defconfig
@@ -10,7 +10,6 @@ CONFIG_BLK_DEV_INITRD=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_CRASH_DUMP=y
 CONFIG_MARCH_Z13=y
-# CONFIG_COMPAT is not set
 CONFIG_NR_CPUS=2
 CONFIG_HZ_100=y
 # CONFIG_CHSC_SCH is not set