[SPARC64]: Do not call winfix_dax blindly

Verify we really are taking a data access exception trap, at TL1, from
one of the window spill/fill handlers.

Else call a new function, data_access_exception_tl1, to log the error.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index 0c9e54b2f0c8..210b3e321c29 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -220,6 +220,17 @@ void data_access_exception(struct pt_regs *regs,
         force_sig_info(SIGSEGV, &info, current);
 }
 
+void data_access_exception_tl1(struct pt_regs *regs,
+                               unsigned long sfsr, unsigned long sfar)
+{
+        if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs,
+                       0, 0x30, SIGTRAP) == NOTIFY_STOP)
+                return;
+
+        dump_tl1_traplog((struct tl1_traplog *)(regs + 1));
+        data_access_exception(regs, sfsr, sfar);
+}
+
 #ifdef CONFIG_PCI
 /* This is really pathetic... */
 extern volatile int pci_poke_in_progress;