Re: [patch] fix syscall speedup patch mips typo

Patch is below. The idea behind this patch is based on a suggestion from Steve Grubb to not call 'audit_syscall_entry' and 'audit_syscall_exit' if there are no audit rules loaded. This is problematic for the case where audit_log() is called in the middle of a system call (since we don't have the entry parameters). We address this issue by creating a partial system call record for this case, which contains the system call data that is available at exit time. The patch shows a 30% performance increase for the case where no rules are loaded on testing system calls in a tight loop.