On Tue, 10 Jun 2025 12:23:18 PDT (-0700), Alexandre Ghiti wrote:
Hi Chunyan,
On 6/10/25 12:12, Chunyan Zhang wrote:
The first two patches are fixes.
The last two are for userspace raid6test support on RISC-V.
The issue fixed in patch 2/4 was probably the same which was spotted by
Charlie [1], I couldn't reproduce it at that time.
When running raid6test in userspace on RISC-V, I saw a segmentation fault,
I used gdb command to print pointer p, it was an unaccessible address.
Can you give me your config, kernel and toolchain versions? I can't
reproduce the segfault on my machine.
It's probably going to be super fragile to reproduce. The code is just
scrubbing over t0 without a clobber, so it's just going to break stuff
somewhat arbitrarily.
Thanks for the fixes and the test, I'll take a look this week.
Alex
With patch 2/4, the issue didn't appear anymore.
[1] https://lore.kernel.org/lkml/Z5gJ35pXI2W41QDk@ghost/
Chunyan Zhang (4):
raid6: riscv: clean up unused header file inclusion
raid6: riscv: Fix NULL pointer dereference issue
raid6: riscv: Allow code to be compiled in userspace
raid6: test: add support for RISC-V
lib/raid6/recov_rvv.c | 9 +-----
lib/raid6/rvv.c | 62 +++++++++++++++++++++--------------------
lib/raid6/rvv.h | 15 ++++++++++
lib/raid6/test/Makefile | 8 ++++++
4 files changed, 56 insertions(+), 38 deletions(-)
