Remove redundant checks in syscall entry/exit, rename badly named function

* syscall.c (syscall_enter): Rename to get_syscall_args.
Document its return values.
(trace_syscall_entering): Don't check get_syscall_args() return
value for 0, it never returns that.
(syscall_fixup_on_sysexit): Make it return void.
(trace_syscall_exiting): Fix up syscall_fixup_on_sysexit()
call site accordingly.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
1 file changed