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Subject[REVIEW][PATCH 13/17] signal/powerpc: Replace FPE_FIXME with FPE_FLTUNK
Using an si_code of 0 that aliases with SI_USER is clearly the
wrong thing todo, and causes problems in interesting ways.

The newly defined FPE_FLTUNK semantically appears to fit the
bill so use it instead.

Cc: Paul Mackerras <paulus@samba.org>
Cc: Kumar Gala <kumar.gala@freescale.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@lists.ozlabs.org
Fixes: 9bad068c24d7 ("[PATCH] ppc32: support for e500 and 85xx")
Fixes: 0ed70f6105ef ("PPC32: Provide proper siginfo information on various exceptions.")
History Tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
arch/powerpc/include/uapi/asm/siginfo.h | 7 -------
arch/powerpc/kernel/traps.c | 6 +++---
2 files changed, 3 insertions(+), 10 deletions(-)

diff --git a/arch/powerpc/include/uapi/asm/siginfo.h b/arch/powerpc/include/uapi/asm/siginfo.h
index 9f142451a01f..0437afc9ef3c 100644
--- a/arch/powerpc/include/uapi/asm/siginfo.h
+++ b/arch/powerpc/include/uapi/asm/siginfo.h
@@ -15,13 +15,6 @@

#include <asm-generic/siginfo.h>

-/*
- * SIGFPE si_codes
- */
-#ifdef __KERNEL__
-#define FPE_FIXME 0 /* Broken dup of SI_USER */
-#endif /* __KERNEL__ */
-
/*
* SIGTRAP si_codes
*/
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 087855caf6a9..fdf9400beec8 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1031,7 +1031,7 @@ static void emulate_single_step(struct pt_regs *regs)

static inline int __parse_fpscr(unsigned long fpscr)
{
- int ret = FPE_FIXME;
+ int ret = FPE_FLTUNK;

/* Invalid operation */
if ((fpscr & FPSCR_VE) && (fpscr & FPSCR_VX))
@@ -1972,7 +1972,7 @@ void SPEFloatingPointException(struct pt_regs *regs)
extern int do_spe_mathemu(struct pt_regs *regs);
unsigned long spefscr;
int fpexc_mode;
- int code = FPE_FIXME;
+ int code = FPE_FLTUNK;
int err;

flush_spe_to_thread(current);
@@ -2041,7 +2041,7 @@ void SPEFloatingPointRoundException(struct pt_regs *regs)
printk(KERN_ERR "unrecognized spe instruction "
"in %s at %lx\n", current->comm, regs->nip);
} else {
- _exception(SIGFPE, regs, FPE_FIXME, regs->nip);
+ _exception(SIGFPE, regs, FPE_FLTUNK, regs->nip);
return;
}
}
--
2.14.1
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