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authorBabu Moger <babu.moger@oracle.com>2016-11-02 09:36:32 -0700
committerDavid S. Miller <davem@davemloft.net>2016-11-18 11:33:19 -0800
commite6b5f1be7afe1657c40c08082c562b1a036a54c1 (patch)
tree6f1b8b2c21dff64eeb0741397381ae0cec56a417
parent1a9bbccaf8182da368dae454b57dc1c55074d266 (diff)
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>
-rw-r--r--arch/sparc/Kconfig1
-rw-r--r--lib/Kconfig.debug3
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 60145c9b9f84..165ecdd24d22 100644
--- 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 b01e547d4d04..a6c8db1d62f6 100644
--- 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