[tip: x86/cpu] x86/platform: Only allow CONFIG_EISA for 32-bit

[tip-bot2 for Arnd Bergmann]

The following commit has been merged into the x86/cpu branch of tip:

Commit-ID:     976ba8da2f3c2f1e997f4f620da83ae65c0e3728
Gitweb:        https://git.kernel.org/tip/976ba8da2f3c2f1e997f4f620da83ae65c0e3728
Author:        Arnd Bergmann <arnd@xxxxxxxx>
AuthorDate:    Wed, 26 Feb 2025 22:37:14 +01:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Thu, 27 Feb 2025 11:22:16 +01:00

x86/platform: Only allow CONFIG_EISA for 32-bit

The CONFIG_EISA menu was cleaned up in 2018, but this inadvertently
brought the option back on 64-bit machines: ISA remains guarded by
a CONFIG_X86_32 check, but EISA no longer depends on ISA.

The last Intel machines ith EISA support used a 82375EB PCI/EISA bridge
from 1993 that could be paired with the 440FX chipset on early Pentium-II
CPUs, long before the first x86-64 products.

Fixes: 6630a8e50105 ("eisa: consolidate EISA Kconfig entry in drivers/eisa")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20250226213714.4040853-11-arnd@xxxxxxxxxx
---
 arch/x86/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 383b145..aa90f03 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -233,7 +233,7 @@ config X86
 	select HAVE_SAMPLE_FTRACE_DIRECT_MULTI	if X86_64
 	select HAVE_EBPF_JIT
 	select HAVE_EFFICIENT_UNALIGNED_ACCESS
-	select HAVE_EISA
+	select HAVE_EISA			if X86_32
 	select HAVE_EXIT_THREAD
 	select HAVE_GUP_FAST
 	select HAVE_FENTRY			if X86_64 || DYNAMIC_FTRACE