powerpc/pkeys: Remove unused code

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This removes arch_supports_pkeys(), arch_usable_pkeys() and
thread_pkey_regs_*() which are remnants from the following:

commit 06bb53b338 ("powerpc: store and restore the pkey state across context switches")
commit 2cd4bd192e ("powerpc/pkeys: Fix handling of pkey state across fork()")
commit cf43d3b264 ("powerpc: Enable pkey subsystem")

arch_supports_pkeys() and arch_usable_pkeys() were unused
since their introduction while thread_pkey_regs_*() became
unused after the introduction of the following:

commit d5fa30e699 ("powerpc/book3s64/pkeys: Reset userspace AMR correctly on exec")
commit 48a8ab4eeb ("powerpc/book3s64/pkeys: Don't update SPRN_AMR when in kernel mode")

Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Reviewed-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210202150050.75335-1-sandipan@linux.ibm.com

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This commit is contained in:

Sandipan Das 2021-02-02 20:30:50 +05:30 • committed by Michael Ellerman

parent ea7826583f

commit 266d8f7586

2 changed files with 0 additions and 9 deletions

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3

arch/powerpc/include/asm/mmu_context.h

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6

arch/powerpc/include/asm/pkeys.h

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