powerpc/mm: Optimize detection of thread local mm's

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Instead of comparing the whole CPU mask every time, let's
keep a counter of how many bits are set in the mask. Thus
testing for a local mm only requires testing if that counter
is 1 and the current CPU bit is set in the mask.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Benjamin Herrenschmidt 2017-07-24 14:28:02 +10:00 • committed by Michael Ellerman

parent b426e4bd77

commit a619e59c07

4 changed files with 24 additions and 1 deletions

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3

arch/powerpc/include/asm/book3s/64/mmu.h

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9

arch/powerpc/include/asm/mmu_context.h

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11

arch/powerpc/include/asm/tlb.h

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2

arch/powerpc/mm/mmu_context_book3s64.c

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