ARC: Handle zero-overhead-loop in unaligned access handler

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arc / kernel / unaligned.c

diff --git a/arch/arc/kernel/unaligned.c b/arch/arc/kernel/unaligned.c
index 4cd81633febd2c8dc91aa290837feed7370d06ce..116d3e09b5b55f1a977859d2313496ff497442d7 100644 (file)
--- a/arch/arc/kernel/unaligned.c
+++ b/arch/arc/kernel/unaligned.c
@@ -233,6 +233,12 @@ int misaligned_fixup(unsigned long address, struct pt_regs *regs,
                regs->status32 &= ~STATUS_DE_MASK;
        } else {
                regs->ret += state.instr_len;
+
+               /* handle zero-overhead-loop */
+               if ((regs->ret == regs->lp_end) && (regs->lp_count)) {
+                       regs->ret = regs->lp_start;
+                       regs->lp_count--;
+               }
        }
 
        return 0;