x86: make pda a percpu variable

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[ Based on original patch from Christoph Lameter and Mike Travis. ]

As pda is now allocated in percpu area, it can easily be made a proper
percpu variable.  Make it so by defining per cpu symbol from linker
script and declaring it in C code for SMP and simply defining it for
UP.  This change cleans up code and brings SMP and UP closer a bit.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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This commit is contained in:

Tejun Heo 2009-01-13 20:41:35 +09:00 • committed by Ingo Molnar

parent 9939ddaff5

commit b12d8db8fb

6 changed files with 23 additions and 20 deletions

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5

arch/x86/include/asm/pda.h

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3

arch/x86/kernel/cpu/common.c

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10

arch/x86/kernel/head64.c

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5

arch/x86/kernel/head_64.S

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16

arch/x86/kernel/setup_percpu.c

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4

arch/x86/kernel/vmlinux_64.lds.S

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