Re: [RFC PATCH 00/19] unify init_task

[Arnd Bergmann <arnd@arndb.de>]

On Thursday 11 December 2008, Kyle McMartin wrote:
> Create a common kernel/init_task.c, and convert low hanging fruit to
> use it. Architecture maintainers will need to ensure that I didn't
> break anything before applying the init_task removal patch to their
> arch.
> 
> A few architectures appear to possibly rely on link-ordering (with
> an extra-y makefile rule) and may need additional linker script rules.

FWIW, here is the alignment of init_thread_info on all architectures:

alpha: 2 * PAGE_SIZE
arm, avr32, frv, mn10300, s390, sh, x86: THREAD_SIZE
blackfin: THREAD_SIZE, but uses a different section
cris, m68k-sun3: PAGE_SIZE
h8300, m32r, m68knommu, ppc32, xtensa, m68k-std: 0x2000/8192
ia64: PAGE_SIZE (but ia64 is different)
mips: _PAGE_SIZE
parisc, ppc64: 16384
ppc32: 8192
um: KERNEL_STACK_SIZE
sparc: PAGE_SIZE with .text section
sparc64: 16384 (implicit)

This is the same as THREAD_SIZE on all architectures, except for
mips in certain configurations, which should be fixed.

Maybe we can get all of them to just use THREAD_SIZE in there?

	Arnd <><