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s390: Remove compat support

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There shouldn't be any 31 bit code around anymore that matters.
Remove the compat layer support required to run 31 bit code.

Reason for removal is code simplification and reduced test effort.

Note that this comes without any deprecation warnings added to config
options, or kernel messages, since most likely those would be ignored
anyway.

If it turns out there is still a reason to keep the compat layer this
can be reverted at any time in the future.

Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Heiko Carstens
2025-11-10 19:54:37 +01:00
parent 169ebcbb90
commit 8e0b986c59
57 changed files with 30 additions and 2484 deletions
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16
arch/s390/Kconfig
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@@ -505,22 +505,6 @@ config COMMAND_LINE_SIZE
This allows you to specify the maximum length of the kernel command
line.
config COMPAT
def_bool n
prompt "Kernel support for 31 bit emulation"
select ARCH_WANT_OLD_COMPAT_IPC
select COMPAT_OLD_SIGACTION
select HAVE_UID16
depends on MULTIUSER
depends on !CC_IS_CLANG && !LD_IS_LLD
help
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.
If unsure say N.
config SMP
def_bool y