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x86/32: Remove CONFIG_DOUBLEFAULT

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Make the doublefault exception handler unconditional on 32-bit. Yes,
it is important to be able to catch #DF exceptions instead of silent
reboots. Yes, the code size increase is worth every byte. And one less
CONFIG symbol is just the cherry on top.

No functional changes.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200404083646.8897-1-bp@alien8.de
This commit is contained in:
Borislav Petkov
2020-04-04 01:33:05 +02:00
parent 8f3d9f3542
commit 593309423c
9 changed files with 3 additions and 27 deletions
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9
arch/x86/Kconfig.debug
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@@ -99,15 +99,6 @@ config DEBUG_WX
If in doubt, say "Y".
config DOUBLEFAULT
default y
bool "Enable doublefault exception handler" if EXPERT && X86_32
---help---
This option allows trapping of rare doublefault exceptions that
would otherwise cause a system to silently reboot. Disabling this
option saves about 4k and might cause you much additional grey
hair.
config DEBUG_TLBFLUSH
bool "Set upper limit of TLB entries to flush one-by-one"
depends on DEBUG_KERNEL