src/patches/suse-2.6.27.39/patches.arch/s390-17-perf-01-framepointer.patch

   1 From: Gerald Schaefer <geraldsc@de.ibm.com>
   2 Subject: [S390] omit frame pointers on s390 when possible
   3 References: bnc#532063,LTC#55526
   4
   5 commit 75ee034addc9ac3f6a38a9e6b30e9b54be15d4e5
   6 Author: Heiko Carstens <heiko.carstens@de.ibm.com>
   7 Date:   Thu Apr 23 13:58:10 2009 +0200
   8
   9     [S390] omit frame pointers on s390 when possible
  10
  11     Always omit frame pointers on s390. They aren't too useful for the
  12     kernel since we have already the kernel stack backchain which allows
  13     us to walk the kernel stack.
  14     So eleminate the extra code for frame pointers. Only allow the extra
  15     code for the function tracer since the gcc compile options -pg and
  16     -fomit-frame-pointer are incompatible.
  17
  18     Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
  19     Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
  20
  21 Acked-by: John Jolly <jjolly@suse.de>
  22
  23 ---
  24  lib/Kconfig.debug |    8 ++++----
  25  1 file changed, 4 insertions(+), 4 deletions(-)
  26
  27 Index: linux-sles11/lib/Kconfig.debug
  28 ===================================================================
  29 --- linux-sles11.orig/lib/Kconfig.debug
  30 +++ linux-sles11/lib/Kconfig.debug
  31 @@ -394,7 +394,7 @@ config LOCKDEP
  32         bool
  33         depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
  34         select STACKTRACE
  35 -       select FRAME_POINTER if !MIPS && !PPC
  36 +       select FRAME_POINTER if !MIPS && !PPC && !S390
  37         select KALLSYMS
  38         select KALLSYMS_ALL
  39
  40 @@ -539,7 +539,7 @@ config DEBUG_SG
  41  config FRAME_POINTER
  42         bool "Compile the kernel with frame pointers"
  43         depends on DEBUG_KERNEL && \
  44 -               (X86 || CRIS || M68K || M68KNOMMU || FRV || UML || S390 || \
  45 +               (X86 || CRIS || M68K || M68KNOMMU || FRV || UML || \
  46                  AVR32 || SUPERH || BLACKFIN || MN10300)
  47         default y if DEBUG_INFO && UML
  48         help
  49 @@ -694,14 +694,14 @@ config FAULT_INJECTION_STACKTRACE_FILTER
  50         depends on FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT
  51         depends on !X86_64
  52         select STACKTRACE
  53 -       select FRAME_POINTER if !PPC && !X86
  54 +       select FRAME_POINTER if !PPC && !X86 && !S390
  55         select UNWIND_INFO if X86 && !FRAME_POINTER
  56         help
  57           Provide stacktrace filter for fault-injection capabilities
  58
  59  config LATENCYTOP
  60         bool "Latency measuring infrastructure"
  61 -       select FRAME_POINTER if !MIPS && !PPC && !X86
  62 +       select FRAME_POINTER if !MIPS && !PPC && !X86 && !S390
  63         select UNWIND_INFO if X86 && !FRAME_POINTER
  64         select KALLSYMS
  65         select KALLSYMS_ALL