fix siginfo_t for mips

si_errno and si_code are swapped in mips siginfo_t compared to other
archs and some si_code values are different.  This fix is required
for POSIX timers to work.

based on patch by Dmitry Ivanov.

arch/mips/bits/signal.h

@@ -73,6 +73,15 @@ typedef struct __ucontext {
 #define SIG_UNBLOCK   2
 #define SIG_SETMASK   3
 
+#undef SI_ASYNCIO
+#undef SI_MESGQ
+#undef SI_TIMER
+#define SI_ASYNCIO (-2)
+#define SI_MESGQ (-4)
+#define SI_TIMER (-3)
+
+#define __SI_SWAP_ERRNO_CODE
+
 #endif
 
 #define SIGHUP    1

include/signal.h

@@ -94,7 +94,11 @@ union sigval {
 };
 
 typedef struct {
+#ifdef __SI_SWAP_ERRNO_CODE
+	int si_signo, si_code, si_errno;
+#else
 	int si_signo, si_errno, si_code;
+#endif
 	union {
 		char __pad[128 - 2*sizeof(int) - sizeof(long)];
 		struct {