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    Subject[PATCH v3 1/2] config: Adding the new config parameter CONFIG_PROVE_LOCKING_SMALL for sparc
    Date
    This new config parameter limits the space used for "Lock debugging:
    prove locking correctness" by about 4MB. The current sparc systems have
    the limitation of 32MB size for kernel size including .text, .data and
    .bss sections. With PROVE_LOCKING feature, the kernel size could grow
    beyond this limit and causing system boot-up issues. With this option,
    kernel limits the size of the entries of lock_chains, stack_trace etc.,
    so that kernel fits in required size limit. This is not visible to user
    and only used for sparc.

    Signed-off-by: Babu Moger <babu.moger@oracle.com>
    ---
    arch/sparc/Kconfig | 1 +
    lib/Kconfig.debug | 3 +++
    2 files changed, 4 insertions(+), 0 deletions(-)

    diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
    index 59b0960..8da321c 100644
    --- a/arch/sparc/Kconfig
    +++ b/arch/sparc/Kconfig
    @@ -44,6 +44,7 @@ config SPARC
    select ARCH_HAS_SG_CHAIN
    select CPU_NO_EFFICIENT_FFS
    select HAVE_ARCH_HARDENED_USERCOPY
    + select PROVE_LOCKING_SMALL if PROVE_LOCKING

    config SPARC32
    def_bool !64BIT
    diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
    index cab7405..597e589 100644
    --- a/lib/Kconfig.debug
    +++ b/lib/Kconfig.debug
    @@ -1084,6 +1084,9 @@ config PROVE_LOCKING

    For more details, see Documentation/locking/lockdep-design.txt.

    +config PROVE_LOCKING_SMALL
    + bool
    +
    config LOCKDEP
    bool
    depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
    --
    1.7.1
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