bitkeeper revision 1.252 (3eddffe6IQ1eZ1bHUcbBhwG8ApEXrA)

processor.h, setup.c, process.c:
  Further IOPL fix -- also initial idle thread has current->thread.esp0 initialised to a non-zero value.

1 files changed, 5 insertions, 8 deletions

diff --git a/xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/process.c b/xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/process.c
index c1764fce50..b4e7a6cd14 100644
--- a/xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/process.c
+++ b/xenolinux-2.4.21-pre4-sparse/arch/xeno/kernel/process.c
@@ -365,14 +365,11 @@ void __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
         queue_multicall0(__HYPERVISOR_fpu_taskswitch);
     }
 
-    if ( next->esp0 != 0 )
-    {
-        queue_multicall2(__HYPERVISOR_stack_switch, __KERNEL_DS, next->esp0);
-        /* Next call will silently fail if we are a non-privileged guest OS. */
-        queue_multicall2(__HYPERVISOR_set_priv_levels,
-                         ((((struct pt_regs *)next->esp0)-1)->eflags>>12)&3,
-                         next->hypercall_pl);
-    }
+    queue_multicall2(__HYPERVISOR_stack_switch, __KERNEL_DS, next->esp0);
+    /* Next call will silently fail if we are a non-privileged guest OS. */
+    queue_multicall2(__HYPERVISOR_set_priv_levels,
+                     ((((struct pt_regs *)next->esp0)-1)->eflags>>12)&3,
+                     next->hypercall_pl);
 
     /* EXECUTE ALL TASK SWITCH XEN SYSCALLS AT THIS POINT. */
     execute_multicall_list();