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authorPalmer Dabbelt <palmerdabbelt@google.com>2021-01-22 19:34:29 -0800
committerPalmer Dabbelt <palmerdabbelt@google.com>2021-02-18 23:18:02 -0800
commit5dd671333171d1ba44c16e1404f72788412e36f4 (patch)
treee41905abd61331577a2add3263502d044029c028 /arch/riscv
parentd4c34d09ab03e1e631fe195ddf35365a1273be9c (diff)
downloadlinux-5dd671333171d1ba44c16e1404f72788412e36f4.tar.gz
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 <lkp@intel.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com> Acked-by: Guo Ren <guoren@kernel.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv')
-rw-r--r--arch/riscv/kernel/probes/decode-insn.c2
-rw-r--r--arch/riscv/kernel/probes/kprobes.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/riscv/kernel/probes/decode-insn.c b/arch/riscv/kernel/probes/decode-insn.c
index 0876c304ca77..0ed043acc882 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 e60893bd87db..a2ec18662fee 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)) {