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Subject[PATCH 0/7] percpu: Per cpu code simplification rc8-mm1-fixup with git-x86

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

Based on 2.6.24-rc8-mm1 + latest (08/1/21) git-x86

Note there are two versions of this patchset:
- 2.6.24-rc8-mm1
- 2.6.24-rc8-mm1 + latest (08/1/21) git-x86

Signed-off-by: Christoph Lameter <>
Signed-off-by: Mike Travis <>


- 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

- 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.

- fix x86_64 non-SMP case
- 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

- 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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