From: Xiongwei Song <sxwj...@gmail.com> When CONFIG_4xx=y or CONFIG_BOOKE=y, currently in code we reference dsisr to get interrupt reasons and reference dar to get excepiton address. However, in reference manuals, esr is used for interrupt reasons and dear is used for excepiton address, so the patchset changes dsisr -> esr, dar -> dear for CONFIG_4xx=y or CONFIG_BOOKE=y.
Meanwhile, we use _ESR and _DEAR to get offsets of esr and dear on stack. v2: - Discard changes in arch/powerpc/mm/fault.c as Christophe and Michael suggested. - Discard changes in UAPI headers to avoid possible compile issue. v1: - https://lkml.org/lkml/2021/8/6/57 - https://lkml.org/lkml/2021/7/26/533 - https://lkml.org/lkml/2021/7/26/534 - https://lkml.org/lkml/2021/7/26/535 Xiongwei Song (4): powerpc: Optimize register usage for esr register powerpc/64e: Get esr offset with _ESR macro powerpc: Optimize register usage for dear register powerpc/64e: Get dear offset with _DEAR macro arch/powerpc/include/asm/ptrace.h | 10 ++++++++-- arch/powerpc/kernel/asm-offsets.c | 15 ++++----------- arch/powerpc/kernel/exceptions-64e.S | 18 +++++++++--------- arch/powerpc/kernel/process.c | 2 +- arch/powerpc/kernel/ptrace/ptrace.c | 4 ++++ arch/powerpc/kernel/traps.c | 2 +- arch/powerpc/platforms/44x/machine_check.c | 4 ++-- arch/powerpc/platforms/4xx/machine_check.c | 2 +- 8 files changed, 30 insertions(+), 27 deletions(-) -- 2.30.2
