There is a possibility of calling syscall_get_arguments() with zero as 'number of arguments(n)' in ftrace_syscall_enter(). The comments in syscall_get_argumets() as well as syscall_set_arugments() are corrected to clarify that.
Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org --- include/asm-generic/syscall.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/asm-generic/syscall.h b/include/asm-generic/syscall.h index 5b09392..49b35ab 100644 --- a/include/asm-generic/syscall.h +++ b/include/asm-generic/syscall.h @@ -106,7 +106,7 @@ void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, * @task: task of interest, must be blocked * @regs: task_pt_regs() of @task * @i: argument index [0,5] - * @n: number of arguments; n+i must be [1,6]. + * @n: number of arguments; n+i must be [0,6]. * @args: array filled with argument values * * Fetches @n arguments to the system call starting with the @i'th argument @@ -126,7 +126,7 @@ void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, * @task: task of interest, must be in system call entry tracing * @regs: task_pt_regs() of @task * @i: argument index [0,5] - * @n: number of arguments; n+i must be [1,6]. + * @n: number of arguments; n+i must be [0,6]. * @args: array of argument values to store * * Changes @n arguments to the system call starting with the @i'th argument.