Date:	Mon, 14 Nov 2011 10:14:06 +0100
From:	"Tim Sander" <tim.sander@....com>
To:	"Thomas Gleixner" <tglx@...utronix.de>
Cc:	"LKML" <linux-kernel@...r.kernel.org>,
	"linux-rt-users" <linux-rt-users@...r.kernel.org>
Subject: Re: [ANNOUNCE] 3.2-rc1-rt1 - Compile errors also for rc1 vanilla

Hi Thomas

> I'm pleased to announce the 3.2-rc1-rt1 release.
Thanks for that.
 
> It's a straight forward port of the 3.0-rt patch queue, which reduced
> the patch size by more than 25% from 807k to 580k. The diffstat change
> is:
> 
>  429 files changed, 10118 insertions(+), 3000 deletions(-)
>  318 files changed,  8871 insertions(+), 1858 deletions(-)
> 
> Thanks to all who helped polishing patches and bringing them mainline!
> 
> 
> The test results on my reference machine are in the 3.0-rt ballpark
> and I have not seen any frightening explosions so far.

Well it seems as if  this guy which wanted to remove rcu finally succeded ;-)
I can't select a rcu subsystem?
----------------------
target: kernel.compile
----------------------

cd /home/sander/speedy/trunk/ptx/platform-pmx-one/build-target/linux-linux && PATH=/home/sander/speedy/trunk/ptx/platform-pmx-one/sysroot-
cross/bin:/home/sander/speedy/trunk/ptx/platform-pmx-one/sysroot-cross/sbin:$PATH KCONFIG_NOTIMESTAMP=1 make \
                -j16 HOSTCC=gcc ARCH=arm CROSS_COMPILE=arm-1136jfs-linux-gnueabi- INSTALL_MOD_PATH=/home/sander/speedy/trunk/ptx/platform-pmx-one/packages/linux-linux 
PTX_KERNEL_DIR=/home/sander/speedy/trunk/ptx/platform-pmx-one/build-target/linux-linux CONFIG_DEBUG_SECTION_MISMATCH=y 
DEPMOD=/home/sander/speedy/trunk/ptx/platform-pmx-one/sysroot-cross/sbin/arm-1136jfs-linux-gnueabi-depmod uImage "modules"
make[1]: Entering directory `/home/sander/speedy/trunk/ptx/kernel/linux'
scripts/kconfig/conf --silentoldconfig Kconfig
make[1]: Leaving directory `/home/sander/speedy/trunk/ptx/kernel/linux'
make[1]: Entering directory `/home/sander/speedy/trunk/ptx/kernel/linux'
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
make[2]: `include/generated/mach-types.h' is up to date.
  CC      arch/arm/kernel/asm-offsets.s
In file included from include/linux/mm_types.h:15:0,
                 from include/linux/sched.h:64,
                 from arch/arm/kernel/asm-offsets.c:13:
include/linux/rcupdate.h:223:2: error: #error "Unknown RCU implementation specified to kernel configuration"
make[2]: *** [arch/arm/kernel/asm-offsets.s] Error 1
make[1]: *** [prepare0] Error 2
make[1]: Leaving directory `/home/sander/speedy/trunk/ptx/kernel/linux'
make: *** [/home/sander/speedy/trunk/ptx/platform-pmx-one/state/kernel.compile] Error 2


When trying to select the rcu in the menuconfig it is not selectable :-(.

This is on freescale arm i.xm35 platform with local modifications for our own platform.

Havent tried to compile 3.2-rc1 without preempt but that fails with the following error:
----------------------
target: kernel.compile
----------------------

cd /home/sander/speedy/trunk/ptx/platform-pmx-one/build-target/linux-linux && PATH=/home/sander/speedy/trunk/ptx/platform-pmx-one/sysroot-
cross/bin:/home/sander/speedy/trunk/ptx/platform-pmx-one/sysroot-cross/sbin:$PATH KCONFIG_NOTIMESTAMP=1 make \
                -j16 HOSTCC=gcc ARCH=arm CROSS_COMPILE=arm-1136jfs-linux-gnueabi- INSTALL_MOD_PATH=/home/sander/speedy/trunk/ptx/platform-pmx-one/packages/linux-linux 
PTX_KERNEL_DIR=/home/sander/speedy/trunk/ptx/platform-pmx-one/build-target/linux-linux CONFIG_DEBUG_SECTION_MISMATCH=y 
DEPMOD=/home/sander/speedy/trunk/ptx/platform-pmx-one/sysroot-cross/sbin/arm-1136jfs-linux-gnueabi-depmod uImage "modules"
make[1]: Entering directory `/home/sander/speedy/trunk/ptx/kernel/linux'
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
make[2]: `include/generated/mach-types.h' is up to date.
  CALL    scripts/checksyscalls.sh
<stdin>:1562:2: warning: #warning syscall process_vm_readv not implemented
<stdin>:1566:2: warning: #warning syscall process_vm_writev not implemented
  CHK     include/generated/compile.h
  CC      arch/arm/plat-mxc/iomux-v3.o
  CC      arch/arm/plat-mxc/ulpi.o
  CC      arch/arm/plat-mxc/avic.o
  CC      arch/arm/plat-mxc/audmux-v2.o
  CC      arch/arm/plat-mxc/devices/platform-fec.o
  CC      arch/arm/plat-mxc/devices/platform-flexcan.o
  CC      arch/arm/plat-mxc/devices/platform-fsl-usb2-udc.o
  CC      arch/arm/plat-mxc/devices/platform-gpio-mxc.o
  CC      arch/arm/plat-mxc/devices/platform-imx2-wdt.o
arch/arm/plat-mxc/avic.c:154:39: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'avic_handle_irq'
arch/arm/plat-mxc/avic.c:53:12: warning: 'avic_saved_mask_reg' defined but not used
make[2]: *** [arch/arm/plat-mxc/avic.o] Error 1
make[2]: *** Waiting for unfinished jobs....

Will there be still some consolidation for the 3.0 kernel. I really was hoping that the rt kernel still remains a little longer 
on 3.0 since this seems to be a longer maintained kernel version for various groups?

Best regards
Tim

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