x86: Deprecate a.out support

Linux supports ELF binaries for ~25 years now.  a.out coredumping has
bitrotten quite significantly and would need some fixing to get it into
shape again but considering how even the toolchains cannot create a.out
executables in its default configuration, let's deprecate a.out support
and remove it a couple of releases later, instead.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Richard Weinberger <richard@nod.at>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Jann Horn <jannh@google.com>
Cc: <linux-api@vger.kernel.org>
Cc: <linux-fsdevel@vger.kernel.org>
Cc: lkml <linux-kernel@vger.kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <x86@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 1 insertions, 2 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 68261430fe6e..ade12ec4224b 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -14,7 +14,6 @@ config X86_32
         select ARCH_WANT_IPC_PARSE_VERSION
         select CLKSRC_I8253
         select CLONE_BACKWARDS
-        select HAVE_AOUT
         select HAVE_GENERIC_DMA_COHERENT
         select MODULES_USE_ELF_REL
         select OLD_SIGACTION
@@ -2843,6 +2842,7 @@ config IA32_EMULATION
 config IA32_AOUT
         tristate "IA32 a.out support"
         depends on IA32_EMULATION
+        depends on BROKEN
         ---help---
           Support old a.out binaries in the 32bit emulation.
 
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index f518b4744ff8..494eeb51e4e1 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -16,7 +16,6 @@ config 64BIT
 
 config X86_32
         def_bool !64BIT
-        select HAVE_AOUT
         select ARCH_WANT_IPC_PARSE_VERSION
         select MODULES_USE_ELF_REL
         select CLONE_BACKWARDS