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-rw-r--r--arch/ia64/kernel/patch.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/ia64/kernel/patch.c b/arch/ia64/kernel/patch.c
index e0dca8743dbb..b83b2c516008 100644
--- a/arch/ia64/kernel/patch.c
+++ b/arch/ia64/kernel/patch.c
@@ -115,6 +115,29 @@ ia64_patch_vtop (unsigned long start, unsigned long end)
ia64_srlz_i();
}
+/*
+ * Disable the RSE workaround by turning the conditional branch
+ * that we tagged in each place the workaround was used into an
+ * unconditional branch.
+ */
+void __init
+ia64_patch_rse (unsigned long start, unsigned long end)
+{
+ s32 *offp = (s32 *) start;
+ u64 ip, *b;
+
+ while (offp < (s32 *) end) {
+ ip = (u64) offp + *offp;
+
+ b = (u64 *)(ip & -16);
+ b[1] &= ~0xf800000L;
+ ia64_fc((void *) ip);
+ ++offp;
+ }
+ ia64_sync_i();
+ ia64_srlz_i();
+}
+
void __init
ia64_patch_mckinley_e9 (unsigned long start, unsigned long end)
{