From: Palmer Dabbelt Date: Sat, 23 Jan 2021 03:34:29 +0000 (-0800) Subject: RISC-V: probes: Treat the instruction stream as host-endian X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5dd671333171d1ba44c16e1404f72788412e36f4;p=linux.git RISC-V: probes: Treat the instruction stream as host-endian Neither of these are actually correct: the instruction stream is defined (for versions of the ISA manual newer than 2.2) as a stream of 16-bit little-endian parcels, which is different than just being little-endian. In theory we should represent this as a type, but we don't have any concrete plans for the big endian stuff so it doesn't seem worth the time -- we've got variants of this all over the place. Instead I'm just dropping the unnecessary type conversion, which is a NOP on LE systems but causes an sparse error as the types are all mixed up. Reported-by: kernel test robot Signed-off-by: Palmer Dabbelt Acked-by: Guo Ren Signed-off-by: Palmer Dabbelt --- diff --git a/arch/riscv/kernel/probes/decode-insn.c b/arch/riscv/kernel/probes/decode-insn.c index 0876c304ca776..0ed043acc882c 100644 --- a/arch/riscv/kernel/probes/decode-insn.c +++ b/arch/riscv/kernel/probes/decode-insn.c @@ -16,7 +16,7 @@ enum probe_insn __kprobes riscv_probe_decode_insn(probe_opcode_t *addr, struct arch_probe_insn *api) { - probe_opcode_t insn = le32_to_cpu(*addr); + probe_opcode_t insn = *addr; /* * Reject instructions list: diff --git a/arch/riscv/kernel/probes/kprobes.c b/arch/riscv/kernel/probes/kprobes.c index e60893bd87db5..a2ec18662fee0 100644 --- a/arch/riscv/kernel/probes/kprobes.c +++ b/arch/riscv/kernel/probes/kprobes.c @@ -57,7 +57,7 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) } /* copy instruction */ - p->opcode = le32_to_cpu(*p->addr); + p->opcode = *p->addr; /* decode instruction */ switch (riscv_probe_decode_insn(p->addr, &p->ainsn.api)) {