powerpc/32s: Convert switch_mmu_context() to C

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switch_mmu_context() does things that can easily be done in C.

For updating user segments, we have update_user_segments().

As mentionned in commit b5efec00b6 ("powerpc/32s: Move KUEP
locking/unlocking in C"), update_user_segments() has the loop
unrolled which is a significant performance gain.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/05c0875ad8220c03452c3a334946e207c6ca04d6.1622708530.git.christophe.leroy@csgroup.eu

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Christophe Leroy 2021-06-03 08:41:39 +00:00 • committed by Michael Ellerman

parent 7235bb3593

commit 863771a28e

4 changed files with 40 additions and 63 deletions

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5

arch/powerpc/include/asm/book3s/32/kup.h

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arch/powerpc/kernel/asm-offsets.c

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58

arch/powerpc/kernel/head_book3s_32.S

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35

arch/powerpc/mm/book3s32/mmu_context.c

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