powerpc/xmon: Use bitwise calculations in_breakpoint_table()

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A modulo operation is used for calculating the current offset from a
breakpoint within the breakpoint table. As instruction lengths are
always a power of 2, this can be replaced with a bitwise 'and'. The
current check for word alignment can be replaced with checking that the
lower 2 bits are not set.

Suggested-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Alistair Popple <alistair@popple.id.au>
Link: https://lore.kernel.org/r/20200506034050.24806-5-jniethe5@gmail.com

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Jordan Niethe 2020-05-06 13:40:24 +10:00 • committed by Michael Ellerman

parent 4eff2b4f32

commit 5a7fdcab54

1 changed files with 2 additions and 2 deletions

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arch/powerpc/xmon/xmon.c

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