powerpc: Add a probe_user_read_inst() function

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Introduce a probe_user_read_inst() function to use in cases where
probe_user_read() is used for getting an instruction. This will be
more useful for prefixed instructions.

Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Reviewed-by: Alistair Popple <alistair@popple.id.au>
[mpe: Don't write to *inst on error, fold in __user annotations]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200506034050.24806-14-jniethe5@gmail.com

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Jordan Niethe 2020-05-06 13:40:33 +10:00 • committed by Michael Ellerman

parent f8faaffaa7

commit 7ba68b2172

4 changed files with 26 additions and 3 deletions

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3

arch/powerpc/include/asm/inst.h

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2

arch/powerpc/lib/Makefile

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20

arch/powerpc/lib/inst.c

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4

arch/powerpc/mm/fault.c

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