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percpu: Per cpu code simplification fixup

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  1. v1 Latest7 patches 5 repliesIn review

V3->V4 from the cover letter

- rebased patchset on 2.6.24-rc6-mm1
(removes the percpu_modcopy changes that are already in.)
- change config ARCH_SETS_UP_PER_CPU_AREA to a global var and use select HAVE_SETUP_PER_CPU_AREA to specify.

Patches in v1 No applies recorded yet

#Subject and filesSizeRepliesApplied
1/7Modules: Fold percpu_modcopy into module.carch/ia64/kernel/module.c include/asm-generic/percpu.h include/asm-ia64/percpu.h +3 more+8 -423 replies
2/7percpu: Change Kconfig ARCH_SETS_UP_PER_CPU_AREA to HAVE_SETUP_PER_CPU_AREAarch/Kconfig arch/ia64/Kconfig arch/powerpc/Kconfig +4 more+10 -150 replies
3/7Sparc64: Use generic percpuarch/sparc64/mm/init.c include/asm-sparc64/percpu.h+8 -190 replies
4/7ia64: Use generic percpuinclude/asm-ia64/percpu.h include/linux/percpu.h+7 -210 replies
5/7Powerpc: Use generic per cpuinclude/asm-powerpc/percpu.h+2 -180 replies
6/7s390: Use generic percpuinclude/asm-s390/percpu.h+9 -240 replies
7/7percpu: Add debug detection of uninitialized usage of per_cpu variableinclude/asm-generic/percpu.h lib/Kconfig.debug+22 -10 replies

Reviews trailers per patch

1 of 7 patches has a Reviewed-by or Acked-by.

PatchRusty Russell
1/7A-b
2/7
3/7
4/7
5/7
6/7
7/7

Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.

Read the v1 thread

Cover letter [PATCH 0/7] percpu: Per cpu code simplification fixup

This patchset simplifies the code that arches need to maintain to support per cpu functionality. Most of the code is moved into arch independent code. Only a minimal set of definitions is kept for each arch.

The patch also unifies the x86 arch so that there is only a single asm-x86/percpu.h

Based on: 2.6.24-rc8-mm1

Signed-off-by Christoph Lameter <[email protected]>
Signed-off-by Mike Travis <[email protected]>

---

fixup:

- rebased from 2.6.24-rc6-mm1 to 2.6.24-rc8-mm1 (removed changes that are in the git-x86.patch)
- added back in missing fold-percpu_modcopy pieces

V3->V4:
- rebased patchset on 2.6.24-rc6-mm1
(removes the percpu_modcopy changes that are already in.)
- change config ARCH_SETS_UP_PER_CPU_AREA to a global var and use select HAVE_SETUP_PER_CPU_AREA to specify.

V2->V3:
- fix x86_64 non-SMP case
- change SHIFT_PTR to SHIFT_PERCPU_PTR
- fix various percpu_modcopy()'s to reference correct per_cpu_offset()
- s390 has a special way to determine the pointer to a per cpu area

V1->V2:
- Add support for specifying attributes for per cpu declarations (preserves IA64 model(small) attribute).
- Drop first patch that removes the model(small) attribute for IA64
- Missing #endif in powerpc generic config / Wrong Kconfig
- Follow Randy's suggestions on how to do the Kconfig settings

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Read the cover letter in its thread