powerpc/32: transfer can avoid saving r4/r5 over trace call

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Now that handlers get all registers from pt_regs, r4 and r5 are no
longer live here and may be clobbered.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210130130852.2952424-11-npiggin@gmail.com

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Nicholas Piggin 2021-01-30 23:08:20 +10:00 • committed by Michael Ellerman

parent 755d664174

commit 73d7a97914

1 changed files with 1 additions and 6 deletions

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arch/powerpc/kernel/entry_32.S

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