config: Adding the new config parameter CONFIG_PROVE_LOCKING_SMALL for sparc

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>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 60145c9b9f84a9aa1ab2f7954a6f9e3b4565b4e6..165ecdd24d22dec52108d54d2b31db4a38f55aab 100644 (file)
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -43,6 +43,7 @@ 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 b01e547d4d04475e19590aad8f16c403076f7eb6..a6c8db1d62f65ffb2ec6a53011ce0b675f9fb7d4 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1085,6 +1085,9 @@ 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