sched/x86/64, kgdb: Clear GDB_PS on 64-bit

switch_to() no longer saves EFLAGS, so it's bogus to look for it on the
stack.  Set it to zero like 32-bit.

Signed-off-by: Brian Gerst <[email protected]>
Reviewed-by: Josh Poimboeuf <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Jason Wessel <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index fe649a5f509f8ca72355b2cd8b697ba54df59731..5e3f294ce264664391c2aa4e7016ca101191c8b3 100644 (file)
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -176,7 +176,7 @@ void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
        gdb_regs[GDB_FS]        = 0xFFFF;
        gdb_regs[GDB_GS]        = 0xFFFF;
 #else
-       gdb_regs32[GDB_PS]      = *(unsigned long *)(p->thread.sp + 8);
+       gdb_regs32[GDB_PS]      = 0;
        gdb_regs32[GDB_CS]      = __KERNEL_CS;
        gdb_regs32[GDB_SS]      = __KERNEL_DS;
        gdb_regs[GDB_R8]        = 0;