Emit a warning if we attempt to checkpoint a task for which the user
nonvolatile register state (r13-r31) has not been saved. This should
not ever happen.
Signed-off-by: Nathan Lynch <n...@pobox.com>
---
arch/powerpc/mm/checkpoint.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/mm/checkpoint.c b/arch/powerpc/mm/checkpoint.c
index de18467..2634011 100644
--- a/arch/powerpc/mm/checkpoint.c
+++ b/arch/powerpc/mm/checkpoint.c
@@ -107,6 +107,8 @@ static void checkpoint_gprs(struct ckpt_hdr_cpu *cpu_hdr,
cpu_hdr->pt_regs_size = sizeof(*pt_regs);
pt_regs = task_pt_regs(task);
+ WARN_ON(!FULL_REGS(pt_regs));
+
cpu_hdr->pt_regs = *pt_regs;
if (task == current)
--
1.6.0.6
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