powerpc: Disable interrupts for data breakpoint exceptions

Data address breakpoint exceptions are currently handled along with page-faults
which require interrupts to remain in enabled state. Since exception handling
for data breakpoints aren't pre-empt safe, we handle them separately.

Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 26fb6b990b0a..83ac4935eb10 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -151,13 +151,14 @@ int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address,
         if (!user_mode(regs) && (address >= TASK_SIZE))
                 return SIGSEGV;
 
-#if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
+#if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE) || \
+                             defined(CONFIG_PPC_BOOK3S_64))
         if (error_code & DSISR_DABRMATCH) {
                 /* DABR match */
                 do_dabr(regs, address, error_code);
                 return 0;
         }
-#endif /* !(CONFIG_4xx || CONFIG_BOOKE)*/
+#endif
 
         if (in_atomic() || mm == NULL) {
                 if (!user_mode(regs))