[PATCH v2] arch/Kconfig: fix dead conditions by removing dead options

From: Julian Braha

Date: Sun Aug 30 2026 - 19:00:39 EST


These two 'int' options:

ARCH_MMAP_RND_BITS_DEFAULT
ARCH_MMAP_RND_COMPAT_BITS_DEFAULT

are used directly as conditions for defaults. 'int' options should not be
used as conditions, because they will always evaluate to false.

Let's remove these options, because they are not used anywhere else.

This dead code was found by kconfirm, a static analysis tool for Kconfig.

Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
Reviewed-by: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
Signed-off-by: Julian Braha <julianbraha@xxxxxxxxx>
---
Changes since v1:
- add reviewed-by tags from Arnd and Jinjie
- send to Andrew (seems nobody in particular maintains this file)

Link to v1:
https://lore.kernel.org/all/20260729210546.394392-1-julianbraha@xxxxxxxxx/
---
arch/Kconfig | 8 --------
1 file changed, 8 deletions(-)

diff --git a/arch/Kconfig b/arch/Kconfig
index 45c657772362..72890200d049 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -1238,13 +1238,9 @@ config ARCH_MMAP_RND_BITS_MIN
config ARCH_MMAP_RND_BITS_MAX
int

-config ARCH_MMAP_RND_BITS_DEFAULT
- int
-
config ARCH_MMAP_RND_BITS
int "Number of bits to use for ASLR of mmap base address" if EXPERT
range ARCH_MMAP_RND_BITS_MIN ARCH_MMAP_RND_BITS_MAX
- default ARCH_MMAP_RND_BITS_DEFAULT if ARCH_MMAP_RND_BITS_DEFAULT
default ARCH_MMAP_RND_BITS_MIN
depends on HAVE_ARCH_MMAP_RND_BITS
help
@@ -1272,13 +1268,9 @@ config ARCH_MMAP_RND_COMPAT_BITS_MIN
config ARCH_MMAP_RND_COMPAT_BITS_MAX
int

-config ARCH_MMAP_RND_COMPAT_BITS_DEFAULT
- int
-
config ARCH_MMAP_RND_COMPAT_BITS
int "Number of bits to use for ASLR of mmap base address for compatible applications" if EXPERT
range ARCH_MMAP_RND_COMPAT_BITS_MIN ARCH_MMAP_RND_COMPAT_BITS_MAX
- default ARCH_MMAP_RND_COMPAT_BITS_DEFAULT if ARCH_MMAP_RND_COMPAT_BITS_DEFAULT
default ARCH_MMAP_RND_COMPAT_BITS_MIN
depends on HAVE_ARCH_MMAP_RND_COMPAT_BITS
help
--
2.55.0