linux-2.6.34: add unwinding to om-gta02's defconfig

Adding unwinding remove CONFIG_FRAME_POINTER while preserving its
  debug functionalities at the cost of a bigger image
  (that we mitigate by using LZMA compression instead of gzip)
Pratically speaking that should result in speed improvements:
  Speed seem to be faster but was not tested scientifically.

Here's the unwinding help:
  This option enables stack unwinding support in the kernel
  using the information automatically generated by the
  compiler. The resulting kernel image is slightly bigger but
  the performance is not affected. Currently, this feature
  only works with EABI compilers. If unsure say Y.
And the frame pointer help:
  If you say N here, the resulting kernel will be slightly smaller and
  faster. However, if neither FRAME_POINTER nor ARM_UNWIND are enabled,
  when a problem occurs with the kernel, the information that is
  reported is severely limited.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
Acked-by: Klaus Kurzmann <mok@fluxnetz.de>

diff --git a/recipes/linux/linux-2.6.34/om-gta02/defconfig b/recipes/linux/linux-2.6.34/om-gta02/defconfig
index 1a89076..4dce7af 100644 (file)
--- a/recipes/linux/linux-2.6.34/om-gta02/defconfig
+++ b/recipes/linux/linux-2.6.34/om-gta02/defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
 # Linux kernel version: 2.6.34.8
-# Fri Jan 14 10:01:21 2011
+# Sun Feb 20 14:21:33 2011
 #
 CONFIG_ARM=y
 CONFIG_HAVE_PWM=y
@@ -38,9 +38,9 @@ CONFIG_LOCALVERSION=""
 CONFIG_HAVE_KERNEL_GZIP=y
 CONFIG_HAVE_KERNEL_LZMA=y
 CONFIG_HAVE_KERNEL_LZO=y
-CONFIG_KERNEL_GZIP=y
+# CONFIG_KERNEL_GZIP is not set
 # CONFIG_KERNEL_BZIP2 is not set
-# CONFIG_KERNEL_LZMA is not set
+CONFIG_KERNEL_LZMA=y
 # CONFIG_KERNEL_LZO is not set
 CONFIG_SWAP=y
 CONFIG_SYSVIPC=y
@@ -2094,7 +2094,6 @@ CONFIG_STRIP_ASM_SYMS=y
 # CONFIG_DEBUG_KERNEL is not set
 CONFIG_DEBUG_BUGVERBOSE=y
 # CONFIG_DEBUG_MEMORY_INIT is not set
-CONFIG_FRAME_POINTER=y
 # CONFIG_RCU_CPU_STALL_DETECTOR is not set
 # CONFIG_LATENCYTOP is not set
 # CONFIG_SYSCTL_SYSCALL_CHECK is not set
@@ -2103,7 +2102,7 @@ CONFIG_TRACING_SUPPORT=y
 # CONFIG_FTRACE is not set
 # CONFIG_SAMPLES is not set
 CONFIG_HAVE_ARCH_KGDB=y
-# CONFIG_ARM_UNWIND is not set
+CONFIG_ARM_UNWIND=y
 # CONFIG_DEBUG_USER is not set
 # CONFIG_OC_ETM is not set
 CONFIG_DEBUG_S3C_UART=2

diff --git a/recipes/linux/linux-openmoko_2.6.34.bb b/recipes/linux/linux-openmoko_2.6.34.bb
index 0789803..9da7bf8 100644 (file)
--- a/recipes/linux/linux-openmoko_2.6.34.bb
+++ b/recipes/linux/linux-openmoko_2.6.34.bb
@@ -2,5 +2,5 @@ require linux_${PV}.bb
 require linux-openmoko.inc
 # just for upgrade path in 2.6.34
 KERNEL_RELEASE = "2.6.34.8"
-OM-PR = "16"
+OM-PR = "17"
 PKGV = "${KERNEL_RELEASE}-oe${OM-PR}"