On 14/07/2020 02:19, Palmer Dabbelt wrote:
This was suggested in the syzkaller thread as a fix for a bunch of issues. It seems in line with what other architectures are doing, and while I haven't personally figured out how to reproduce the issues they seem believable enough to just change it.
Fixes: 7db91e57a0ac ("RISC-V: Task implementation") Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt palmerdabbelt@google.com
I've put this on fixes as I don't see a patch from anyone on that thread, and it seems straight-forward enough to just do it. If there's any issues I'm happy to listen, otherwise this is going up later this week.
arch/riscv/include/asm/thread_info.h | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h index 1dd12a0cbb2b..2026076b1d30 100644 --- a/arch/riscv/include/asm/thread_info.h +++ b/arch/riscv/include/asm/thread_info.h @@ -12,7 +12,11 @@ #include <linux/const.h> /* thread information allocation */ +#if defined(CONFIG_32BIT) #define THREAD_SIZE_ORDER (1) +#elif defined(CONFIG_64BIT) +#define THREAD_SIZE_ORDER (2) +#endif #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) #ifndef __ASSEMBLY__
FWIW, this fixes a gcov issue I was seeing.