Is there a reason why the following patch didn't make it into 2.4.9?

See: https://mail.gna.org/public/xenomai-help/2009-08/msg00023.html

I included it into our system. I didn't see any problems so far...



On Wed, 2009-08-19 at 17:46 +0200, Philippe Gerum wrote:
> Here is the ninth maintenance release for the v2.4.x branch:
> http://download.gna.org/xenomai/stable/xenomai-2.4.9.tar.bz2
> Special note to PowerPC (32/64) users: the FPU management code has been
> sanitized an awful lot in this release compared to 2.4.8 and earlier
> for this architecture. Really.  Several bugs which may badly break the 
> floating-point registers state "in some circumstances" have
> been fixed.
> Therefore I would strongly recommend to upgrade your Xenomai baseline
> to 2.4.9, and ideally, kernel 2.6/powerpc users should also move their
> I-pipe support to 2.6.30-2.7-00, or at the very least backport _both_ of
> the following patches, in that order, to their kernel tree:
> 1. 
> http://git.denx.de/?p=ipipe-2.6.git;a=blobdiff;f=arch/powerpc/kernel/fpu.S;h=503de51bed94cc2fc4d17b4342885d0329ba5c1b;hp=2436df33c6f4433d7e7f54b88caad6ba570cf3f6;hb=4a9cffba3407f1238646847aad06712d8952a310;hpb=4d121ab41bda8a269c20b0a1077af8f3ef400105
> 2. 
> http://git.denx.de/?p=ipipe-2.6.git;a=commitdiff;h=0024416dcce817854cbf80eff420b21ef615672c;hp=d0353a6d1b4b4af7f6990dfa27055c799b3756a9
> People running a 2.4.25 kernel (the only one officially supported by
> Xenomai from the legacy 2.4/ppc kernel series) should definitely
> upgrade to the following I-pipe patch, to close a few important
> issues, including the FPU ones:
> http://download.gna.org/adeos/patches/v2.4/ppc/adeos-ipipe-2.4.25-ppc-DENX-2.2-01.patch
> Panic mode mitigation: This is a PowerPC-related issue only. Other
> architectures were not affected by those bugs.
> = You have been warned =
> Not scared enough? Ok. Here is the short log for v2.4.9:
> Gilles Chanteperdrix (3):
>       arm: fix syscalls with gcc 4.3.2
>       arm: Disable preemptible switch.
>       posix: fix shm leak
> Graf Yang (1):
>       blackfin: Update __sched_latency for blackfin processors
> Matteo Facchinetti (1):
>       rtcan: fix MPC5xxx_GPIO definition for 2.6.2[0-4] kernels
> Philippe Gerum (54):
>       powerpc: add calibration data for Freescale's ADS8272
>       powerpc: add calibration data for TQ's TQM8560
>       powerpc: upgrade Adeos/powerpc support
>       build: upgrade to autoconf >= 2.62
>       powerpc: add calibration info for 440EP Yosemite
>       powerpc: update Adeos/powerpc support
>       powerpc: unify calibration values for PA-Semi
>       powerpc: upgrade I-pipe/2.4 support to 2.4.25-ppc-2.0-01
>       x86: upgrade I-pipe support to
>       x86: upgrade I-pipe to
>       powerpc: init FPU for userland Xenomai threads as well
>       powerpc: discard useless backup field
>       powerpc: fix fpu backup area layout
>       nucleus: fix potential init race of the main pod
>       powerpc: sanitize kthread init stack setup
>       nucleus: port to 2.6.30
>       native: force no more than PTHREAD_STACK_MIN bytes for stack size
>       powerpc: enable FE0/FE1 exceptions during fpu init
>       powerpc: flip FE0/FE1 when saving/restoring the FPU in RT mode
>       x86: fix wrap_switch_iobitmap() for 2.6.30
>       x86: remove now useless I/O bitmap switch code
>       nucleus: do not dereference thread memory after deletion
>       powerpc: raise SYS_STACKPOOLSZ to 128Kb for 64bit archs
>       nucleus: use larger default sizes for heap and stack pool
>       powerpc: reserve stack overhead in kthread trampoline
>       powerpc: sanitize FPU handling helpers
>       testsuite: add missing compiler barriers to switchtest
>       testsuite: do not specify stack sizes lower than PTHREAD_STACK_MIN
>       powerpc: upgrade legacy I-pipe support to 2.4.25-ppc-2.1-00
>       powerpc: upgrade legacy I-pipe support to 2.6.20-powerpc-1.9-00
>       powerpc: upgrade I-pipe support to 2.6.30-powerpc-2.6-03
>       arm: upgrade I-pipe support to 2.6.28-arm-1.12-03
>       arm: upgrade I-pipe support to 2.6.28-arm-1.13-01
>       x86: fix 2.6.30 build in 32bit mode
>       x86: upgrade I-pipe support to 2.6.30-x86-2.4-05
>       powerpc: upgrade I-pipe support to 2.6.30-powerpc-2.7-00
>       rtai: fix build with CONFIG_PROC_FS disabled
>       blackfin: upgrade I-pipe support to 2.6.30-1.11-00
>       asm-generic: stop using deprecated find_task_by_pid_type_ns()
>       x86: fix include for kernel >= 2.6.30
>       doc: fix GIT tree detection
>       blackfin: do not consider IPEND[4] for scheduling deferral
>       powerpc: reinstate FE0/FE1 depending on the per-task fpexc_mode
>       powerpc: do not leak MSR_FP when back to secondary mode
>       powerpc: upgrade legacy I-pipe support to 2.4.25-ppc-2.2-01
>       nucleus: trap wrong interrupt state upon return from hardening
>       nucleus: postpone sanity check to allow for signal receipt
>       arm: upgrade I-pipe support to 2.6.30-arm-1.14-00, 2.6.28-arm-1.12-04, 
> 2.6.29-arm-1.13-02
>       scripts: use default autoconf version
>       powerpc: upgrade legacy I-pipe support to 2.6.20-powerpc-1.9-01
>       build: update version stamp
>       build: bootstrap
>       doc: regenerate documentation
> Stefan Kisdaroczi (1):
>       debian: fix kernel patch preparation script not to truncate init/Kconfig

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