From 8f2e02394dc907f5e0140bfab80a9aa11e3449ed Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Tue, 28 Jun 2022 00:02:30 +1000 Subject: [PATCH] selftests/powerpc: Don't save CR by default in asm helpers Thare are some asm helpers for creating/popping stack frames in basic_asm.h. They always save/restore CR, but none of the selftests tests touch non-volatile CR fields, so it's unnecessary to save them by default. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220627140239.2464900-4-mpe@ellerman.id.au --- tools/testing/selftests/powerpc/include/basic_asm.h | 4 ---- 1 file changed, 4 deletions(-) diff --git a/tools/testing/selftests/powerpc/include/basic_asm.h b/tools/testing/selftests/powerpc/include/basic_asm.h index 807e83e..faec7b1 100644 --- a/tools/testing/selftests/powerpc/include/basic_asm.h +++ b/tools/testing/selftests/powerpc/include/basic_asm.h @@ -59,14 +59,10 @@ mflr r0; \ std r0, STACK_FRAME_LR_POS(%r1); \ stdu %r1, -(((_extra + 15) & ~15) + STACK_FRAME_MIN_SIZE)(%r1); \ - mfcr r0; \ - stw r0, STACK_FRAME_CR_POS(%r1); \ std %r2, STACK_FRAME_TOC_POS(%r1); #define POP_BASIC_STACK(_extra) \ ld %r2, STACK_FRAME_TOC_POS(%r1); \ - lwz r0, STACK_FRAME_CR_POS(%r1); \ - mtcr r0; \ addi %r1, %r1, (((_extra + 15) & ~15) + STACK_FRAME_MIN_SIZE); \ ld r0, STACK_FRAME_LR_POS(%r1); \ mtlr r0; -- 2.7.4