With threads leaving the math bits enabled in their saved MSR to indicate
that the hardware is hot and a restore is not needed, children need to turn
it off as when they do get scheduled, there's no way their registers could
have been hot.
Signed-off-by: Cyril Bur <cyril...@gmail.com>
---
arch/powerpc/kernel/process.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index dccc87e..e0c3d2d 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1307,6 +1307,7 @@ int copy_thread(unsigned long clone_flags, unsigned long
usp,
f = ret_from_fork;
}
+ childregs->msr &= ~(MSR_FP|MSR_VEC|MSR_VSX);
sp -= STACK_FRAME_OVERHEAD;
/*
--
2.7.0
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