Commit 75ee034a authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

[S390] omit frame pointers on s390 when possible 



Always omit frame pointers on s390. They aren't too useful for the
kernel since we have already the kernel stack backchain which allows
us to walk the kernel stack.
So eleminate the extra code for frame pointers. Only allow the extra
code for the function tracer since the gcc compile options -pg and
-fomit-frame-pointer are incompatible.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 4d7a3cdf

lib/Kconfig.debug

+4 −4
Original line number Diff line number Diff line
@@ -440,7 +440,7 @@ config LOCKDEP 
	bool

	depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT

	select STACKTRACE

	select FRAME_POINTER if !X86 && !MIPS && !PPC && !ARM_UNWIND

	select FRAME_POINTER if !X86 && !MIPS && !PPC && !ARM_UNWIND && !S390

	select KALLSYMS

	select KALLSYMS_ALL
@@ -620,7 +620,7 @@ config ARCH_WANT_FRAME_POINTERS 
config FRAME_POINTER

	bool "Compile the kernel with frame pointers"

	depends on DEBUG_KERNEL && \

		(CRIS || M68K || M68KNOMMU || FRV || UML || S390 || \

		(CRIS || M68K || M68KNOMMU || FRV || UML || \

		 AVR32 || SUPERH || BLACKFIN || MN10300) || \

		ARCH_WANT_FRAME_POINTERS

	default y if (DEBUG_INFO && UML) || ARCH_WANT_FRAME_POINTERS
@@ -809,13 +809,13 @@ config FAULT_INJECTION_STACKTRACE_FILTER 
	depends on FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT

	depends on !X86_64

	select STACKTRACE

	select FRAME_POINTER if !PPC

	select FRAME_POINTER if !PPC && !S390

	help

	  Provide stacktrace filter for fault-injection capabilities



config LATENCYTOP

	bool "Latency measuring infrastructure"

	select FRAME_POINTER if !MIPS && !PPC

	select FRAME_POINTER if !MIPS && !PPC && !S390

	select KALLSYMS

	select KALLSYMS_ALL

	select STACKTRACE

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