powerpc/64e: Clarify register saves and clears with {SAVE,ZEROIZE}_GPRS

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The common interrupt handler prologue macro and the bad_stack
trampolines include consecutive sequences of register saves, and some
register clears. Neaten such instances by expanding use of the SAVE_GPRS
macro and employing the ZEROIZE_GPR macro when appropriate.

Also simplify an invocation of SAVE_GPRS targetting all non-volatile
registers to SAVE_NVGPRS.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Reported-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220921065605.1051927-7-rmclure@linux.ibm.com

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Rohan McLure 2022-09-21 16:55:46 +10:00 • committed by Michael Ellerman

parent 15ba74502c

commit 53ecaa6778

1 changed files with 12 additions and 16 deletions

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arch/powerpc/kernel/exceptions-64e.S

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