From: Serge E. Hallyn <serue@xxxxxxxxxx>
Signed-off-by: Serge E. Hallyn <serue@xxxxxxxxxx>
---
arch/x86/kernel/checkpoint.c | 21 +++++++++++++++------
1 files changed, 15 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kernel/checkpoint.c b/arch/x86/kernel/checkpoint.c
index 5952e27..b01a2fc 100644
--- a/arch/x86/kernel/checkpoint.c
+++ b/arch/x86/kernel/checkpoint.c
@@ -283,12 +283,21 @@ int restore_thread(struct ckpt_ctx *ctx)
load_TLS(thread, cpu);
put_cpu();
-#if defined(CONFIG_X86_64) && defined(CONFIG_COMPAT)
- if (h->thread_info_flags & _TIF_IA32)
- set_thread_flag(TIF_IA32);
- else
- clear_thread_flag(TIF_IA32);
-#endif
+ {
+ int pre, post;
+ /*
+ * Eventually we'd like to support mixed-bit restart, but for
+ * now don't pretend to.
+ */
+ pre = test_thread_flag(TIF_IA32);
+ post = h->thread_info_flags & _TIF_IA32;
+ if ((pre && !post) || (post && !pre)) {
+ ret = -EINVAL;
+ ckpt_err(ctx, ret, "%d-bit restarting %d-bit\n",
+ pre ? 32 : 64, post ? 32 : 64);
+ goto out;
+ }
+ }
/* TODO: restore TIF flags as necessary (e.g. TIF_NOTSC) */
--
1.6.0.4
_______________________________________________
Containers mailing list
Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linux-foundation.org/mailman/listinfo/containers
