[PATCH] ppc64: Fix 32 bits conversion of SI_TIMER signals

The current 32 bits translation of the SI_TIMER is wrong on ppc64, causing
the tst-timer4 testcase of glibc to fail in 32 bits. This patch fixes it.
Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc64/kernel/signal32.c

@@ -472,10 +472,14 @@ static long copy_siginfo_to_user32(compat_siginfo_t __user *d, siginfo_t *s)
 				  &d->si_addr);
 		break;
 	case __SI_POLL >> 16:
-	case __SI_TIMER >> 16:
 		err |= __put_user(s->si_band, &d->si_band);
 		err |= __put_user(s->si_fd, &d->si_fd);
 		break;
+	case __SI_TIMER >> 16:
+		err |= __put_user(s->si_tid, &d->si_tid);
+		err |= __put_user(s->si_overrun, &d->si_overrun);
+		err |= __put_user((u32)(u64)s->si_ptr, &d->si_ptr);
+		break;
 	case __SI_RT >> 16: /* This is not generated by the kernel as of now.  */
 	case __SI_MESGQ >> 16:
 		err |= __put_user(s->si_int, &d->si_int);

include/asm-ppc64/ppc32.h

@@ -32,8 +32,10 @@ typedef struct compat_siginfo {
 
 		/* POSIX.1b timers */
 		struct {
-			unsigned int _timer1;
-			unsigned int _timer2;
+			timer_t _tid;			/* timer id */
+			int _overrun;			/* overrun count */
+			compat_sigval_t _sigval;		/* same as below */
+			int _sys_private;		/* not to be passed to user */
 		} _timer;
 
 		/* POSIX.1b signals */