config: Adding the new config parameter CONFIG_PROVE_LOCKING_SMALL fo…

…r 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 <[email protected]> Acked-by: Sam Ravnborg <[email protected]> Signed-off-by: David S. Miller <[email protected]>
kyagi · Nov 18, 2016 · e6b5f1b · e6b5f1b
1 parent 1a9bbcc
commit e6b5f1b
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diff --git 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
@@ -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