syscall return value is in the register a2, not a0.
Cc: stable@vger.kernel.org # v5.0+ Fixes: 9f24f3c1067c ("xtensa: implement tracehook functions and enable HAVE_ARCH_TRACEHOOK") Signed-off-by: Max Filippov jcmvbkbc@gmail.com --- arch/xtensa/include/asm/syscall.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h index 359ab40e935a..c90fb944f9d8 100644 --- a/arch/xtensa/include/asm/syscall.h +++ b/arch/xtensa/include/asm/syscall.h @@ -51,7 +51,7 @@ static inline void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, int error, long val) { - regs->areg[0] = (long) error ? error : val; + regs->areg[2] = (long) error ? error : val; }
#define SYSCALL_MAX_ARGS 6