[PATCH] lockdep: Fix upper limit for LOCKDEP_BITS configs

From: Xiaomeng Zhang
Date: Fri Mar 14 2025 - 03:00:21 EST


The upper limit that was initially setup for LOCKDEP_BITS configs
is too high (24 bit shift), which causes the kernel image size to exceed
KERNEL_IMAGE_SIZE (1024MB) limit. When LOCKDEP_BITS is set to 24,
the kernel image size grows to 1562.19MB.

Adjust LOCKDEP_BITS to 22, which results in a kernel image size of
888.19MB, keeping it under the KERNEL_IMAGE_SIZE limit while still
maintaining adequate debug information capacity.

This change prevents the linker error:
ld: kernel image bigger than KERNEL_IMAGE_SIZE

Fixes: e638072e6172 ("lockdep: Fix upper limit for LOCKDEP_*_BITS configs")
Signed-off-by: Xiaomeng Zhang <zhangxiaomeng13@xxxxxxxxxx>
---
lib/Kconfig.debug | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 35796c290ca3..6faba965a349 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1504,7 +1504,7 @@ config LOCKDEP_SMALL
config LOCKDEP_BITS
int "Size for MAX_LOCKDEP_ENTRIES (as Nth power of 2)"
depends on LOCKDEP && !LOCKDEP_SMALL
- range 10 24
+ range 10 22
default 15
help
Try increasing this value if you hit "BUG: MAX_LOCKDEP_ENTRIES too low!" message.
--
2.34.1