[PATCH] ia64: Clearing of exception status before calling IA32 user signal handler

One more bug fix for IA32 exception handler. IA32 exception handler is
not clearing the exception status, before calling the user signal handler
routine.

arch/ia64/ia32/ia32_signal.c

@@ -219,6 +219,7 @@ save_ia32_fpstate_live (struct _fpstate_ia32 *save)
 	struct _fpreg_ia32 *fpregp;
 	char buf[32];
 	unsigned long fsr, fcr, fir, fdr;
+	unsigned long new_fsr;
 	unsigned long num128[2];
 	unsigned long mxcsr=0;
 	int fp_tos, fr8_st_map;
@@ -231,6 +232,13 @@ save_ia32_fpstate_live (struct _fpstate_ia32 *save)
 	asm volatile ( "mov %0=ar.fcr;" : "=r"(fcr));
 	asm volatile ( "mov %0=ar.fir;" : "=r"(fir));
 	asm volatile ( "mov %0=ar.fdr;" : "=r"(fdr));
+	/*
+	 * We need to clear the exception state before calling the signal
+	 * handler. Clear the bits 15, bits 0-7 in fp status word. Similar
+	 * to the functionality of fnclex instruction.
+	 */ 
+	new_fsr = fsr & (~0x80ff) ;
+	asm volatile ( "mov ar.fsr=%0;" :: "r"(new_fsr));
 
 	__put_user(fcr & 0xffff, &save->cw);
 	__put_user(fsr & 0xffff, &save->sw);