Commit 23434fcf authored by Carlos Llamas's avatar Carlos Llamas Committed by Greg Kroah-Hartman
Browse files

lockdep: Fix upper limit for LOCKDEP_*_BITS configs



[ Upstream commit e638072e ]

Lockdep has a set of configs used to determine the size of the static
arrays that it uses. However, the upper limit that was initially setup
for these configs is too high (30 bit shift). This equates to several
GiB of static memory for individual symbols. Using such high values
leads to linker errors:

  $ make defconfig
  $ ./scripts/config -e PROVE_LOCKING --set-val LOCKDEP_BITS 30
  $ make olddefconfig all
  [...]
  ld: kernel image bigger than KERNEL_IMAGE_SIZE
  ld: section .bss VMA wraps around address space

Adjust the upper limits to the maximum values that avoid these issues.
The need for anything more, likely points to a problem elsewhere. Note
that LOCKDEP_CHAINS_BITS was intentionally left out as its upper limit
had a different symptom and has already been fixed [1].

Reported-by: default avatarJ. R. Okajima <hooanon05g@gmail.com>
Closes: https://lore.kernel.org/all/30795.1620913191@jrobl/

 [1]
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Acked-by: default avatarWaiman Long <longman@redhat.com>
Signed-off-by: default avatarCarlos Llamas <cmllamas@google.com>
Signed-off-by: default avatarBoqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20241024183631.643450-2-cmllamas@google.com


Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 56135262
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