Here are some patches that consolidate init_task handling:
(1) Alter the INIT_TASK_DATA linker script macro to set init_thread_union
and init_stack rather than defining these in C.
Insert init_task and init_thread_into into the init_stack area in the
linker script as appropriate to the configuration, with different
section markers so that they end up correctly ordered.
We can then get merge ia64's init_task.c into the main one.
We then have a bunch of single-use INIT_*() macros that seem only to be
macros because they used to be used per-arch. We can then unroll these in
place of the user and get rid of a few lines and a lot of backslashes.
(2) Unroll INIT_TASK().
(3) Unroll various small INIT_*() macros that are defined conditionally.
Unroll them and surround them by #if[n]def/#endif in the .c file as it
takes fewer lines.
(4) Unroll INIT_SIGNALS() and INIT_SIGHAND().
(5) Unroll INIT_STRUCT_PID.
The patches can be found here also:
http://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git/log/?h=init_task
David
---
David Howells (5):
Construct init thread stack in the linker script rather than by union
Unroll INIT_TASK() in init/init_task.c
Unroll various INIT_* macros
Unroll the INIT_SIGNALS and INIT_SIGHAND macros
Unroll INIT_STRUCT_PID
arch/Kconfig | 4
arch/alpha/include/asm/thread_info.h | 3
arch/arc/include/asm/thread_info.h | 3
arch/arm/include/asm/thread_info.h | 3
arch/arm64/include/asm/thread_info.h | 2
arch/avr32/include/asm/thread_info.h | 3
arch/blackfin/include/asm/thread_info.h | 2
arch/c6x/include/asm/thread_info.h | 3
arch/cris/include/asm/processor.h | 2
arch/frv/include/asm/thread_info.h | 3
arch/h8300/include/asm/thread_info.h | 3
arch/hexagon/include/asm/thread_info.h | 3
arch/ia64/Kconfig | 2
arch/ia64/Makefile | 2
arch/ia64/include/asm/thread_info.h | 4
arch/ia64/kernel/Makefile | 2
arch/ia64/kernel/init_task.c | 43 -----
arch/ia64/kernel/vmlinux.lds.S | 1
arch/m32r/include/asm/thread_info.h | 3
arch/m68k/include/asm/thread_info.h | 2
arch/metag/include/asm/thread_info.h | 3
arch/microblaze/include/asm/thread_info.h | 3
arch/mips/include/asm/thread_info.h | 3
arch/mn10300/include/asm/thread_info.h | 2
arch/nios2/include/asm/thread_info.h | 3
arch/openrisc/include/asm/processor.h | 2
arch/parisc/include/asm/thread_info.h | 3
arch/powerpc/include/asm/thread_info.h | 3
arch/s390/include/asm/thread_info.h | 2
arch/score/include/asm/thread_info.h | 3
arch/sh/include/asm/thread_info.h | 3
arch/sparc/include/asm/thread_info_32.h | 3
arch/sparc/include/asm/thread_info_64.h | 3
arch/tile/include/asm/thread_info.h | 3
arch/um/include/asm/processor-generic.h | 2
arch/um/include/asm/thread_info.h | 3
arch/unicore32/include/asm/thread_info.h | 3
arch/x86/include/asm/thread_info.h | 2
arch/xtensa/include/asm/thread_info.h | 3
include/asm-generic/vmlinux.lds.h | 4
include/linux/init_task.h | 247 +----------------------------
include/linux/sched.h | 9 +
init/Makefile | 2
init/init_task.c | 158 ++++++++++++++++++-
kernel/pid.c | 15 ++
45 files changed, 196 insertions(+), 384 deletions(-)
delete mode 100644 arch/ia64/kernel/init_task.c
