ARC: dw2 unwind: Remove falllback linear search thru FDE entries

[cascardo/linux.git] / arch / arc / kernel / unwind.c

diff --git a/arch/arc/kernel/unwind.c b/arch/arc/kernel/unwind.c
index 93c6ea5..7352475 100644 (file)
--- a/arch/arc/kernel/unwind.c
+++ b/arch/arc/kernel/unwind.c
@@ -986,42 +986,13 @@ int arc_unwind(struct unwind_frame_info *frame)
                                                            (const u8 *)(fde +
                                                                         1) +
                                                            *fde, ptrType);
-                               if (pc >= endLoc)
+                               if (pc >= endLoc) {
                                        fde = NULL;
-                       } else
-                               fde = NULL;
-               }
-               if (fde == NULL) {
-                       for (fde = table->address, tableSize = table->size;
-                            cie = NULL, tableSize > sizeof(*fde)
-                            && tableSize - sizeof(*fde) >= *fde;
-                            tableSize -= sizeof(*fde) + *fde,
-                            fde += 1 + *fde / sizeof(*fde)) {
-                               cie = cie_for_fde(fde, table);
-                               if (cie == &bad_cie) {
                                        cie = NULL;
-                                       break;
                                }
-                               if (cie == NULL
-                                   || cie == &not_fde
-                                   || (ptrType = fde_pointer_type(cie)) < 0)
-                                       continue;
-                               ptr = (const u8 *)(fde + 2);
-                               startLoc = read_pointer(&ptr,
-                                                       (const u8 *)(fde + 1) +
-                                                       *fde, ptrType);
-                               if (!startLoc)
-                                       continue;
-                               if (!(ptrType & DW_EH_PE_indirect))
-                                       ptrType &=
-                                           DW_EH_PE_FORM | DW_EH_PE_signed;
-                               endLoc =
-                                   startLoc + read_pointer(&ptr,
-                                                           (const u8 *)(fde +
-                                                                        1) +
-                                                           *fde, ptrType);
-                               if (pc >= startLoc && pc < endLoc)
-                                       break;
+                       } else {
+                               fde = NULL;
+                               cie = NULL;
                        }
                }
        }