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List:       linux-stable-commits
Subject:    Patch "parisc: clear floating point exception flag on SIGFPE signal" has been added to the 2.6.32-st
From:       <gregkh () suse ! de>
Date:       2010-06-25 23:31:31
Message-ID: 12775086911751 () site
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This is a note to let you know that I've just added the patch titled

    parisc: clear floating point exception flag on SIGFPE signal

to the 2.6.32-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
    parisc-clear-floating-point-exception-flag-on-sigfpe-signal.patch
and it can be found in the queue-2.6.32 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@kernel.org> know about it.


From 550f0d922286556c7ea43974bb7921effb5a5278 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Mon, 3 May 2010 20:44:21 +0000
Subject: parisc: clear floating point exception flag on SIGFPE signal

From: Helge Deller <deller@gmx.de>

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@gmx.de>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 arch/parisc/math-emu/decode_exc.c |    1 +
 1 file changed, 1 insertion(+)

--- 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[],
 		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);


Patches currently in stable-queue which might be from deller@gmx.de are

queue-2.6.32/parisc-clear-floating-point-exception-flag-on-sigfpe-signal.patch
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