GIT: unionfs2-2.6.27.y: parisc: clear floating point exception flag on SIGFPE signal

[Erez Zadok]

commit 648efc40754d15a7f38fc31d50bdc4e04024630d
Author: Helge Deller <deller at gmx.de>
Date:   Mon May 3 20:44:21 2010 +0000

    parisc: clear floating point exception flag on SIGFPE signal
    
    commit 550f0d922286556c7ea43974bb7921effb5a5278 upstream.
    
    Clear the floating point exception flag before returning to
    user space. This is needed, else the libc trampoline handler
    may hit the same SIGFPE again while building up a trampoline
    to a signal handler.
    
    Fixes debian bug #559406.
    
    Signed-off-by: Helge Deller <deller at gmx.de>
    Signed-off-by: Kyle McMartin <kyle at mcmartin.ca>
    Signed-off-by: Greg Kroah-Hartman <gregkh at suse.de>

diff --git a/arch/parisc/math-emu/decode_exc.c b/arch/parisc/math-emu/decode_exc.c
index 66c8a9f..62ebcde 100644
--- a/arch/parisc/math-emu/decode_exc.c
+++ b/arch/parisc/math-emu/decode_exc.c
@@ -342,6 +342,7 @@ decode_fpu(unsigned int Fpu_register[], unsigned int trap_counts[])
 		return SIGNALCODE(SIGFPE, FPE_FLTINV);
 	  case DIVISIONBYZEROEXCEPTION:
 		update_trap_counts(Fpu_register, aflags, bflags, trap_counts);
+		Clear_excp_register(exception_index);
 	  	return SIGNALCODE(SIGFPE, FPE_FLTDIV);
 	  case INEXACTEXCEPTION:
 		update_trap_counts(Fpu_register, aflags, bflags, trap_counts);