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-rw-r--r--arch/blackfin/mach-common/interrupt.S17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/blackfin/mach-common/interrupt.S b/arch/blackfin/mach-common/interrupt.S
index cee62cf4acd4..2df37db3b49b 100644
--- a/arch/blackfin/mach-common/interrupt.S
+++ b/arch/blackfin/mach-common/interrupt.S
@@ -116,7 +116,24 @@ __common_int_entry:
cc = r0 == 0;
if cc jump .Lcommon_restore_context;
#else /* CONFIG_IPIPE */
+
+#ifdef CONFIG_PREEMPT
+ r7 = sp;
+ r4.l = lo(ALIGN_PAGE_MASK);
+ r4.h = hi(ALIGN_PAGE_MASK);
+ r7 = r7 & r4;
+ p5 = r7;
+ r7 = [p5 + TI_PREEMPT]; /* get preempt count */
+ r7 += 1; /* increment it */
+ [p5 + TI_PREEMPT] = r7;
+#endif
pseudo_long_call _do_irq, p2;
+
+#ifdef CONFIG_PREEMPT
+ r7 += -1;
+ [p5 + TI_PREEMPT] = r7; /* restore preempt count */
+#endif
+
SP += 12;
#endif /* CONFIG_IPIPE */
pseudo_long_call _return_from_int, p2;