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Benjamin Herrenschmidt authored
commit 5a69aec9 upstream. VSX uses a combination of the old vector registers, the old FP registers and new "second halves" of the FP registers. Thus when we need to see the VSX state in the thread struct (flush_vsx_to_thread()) or when we'll use the VSX in the kernel (enable_kernel_vsx()) we need to ensure they are all flushed into the thread struct if either of them is individually enabled. Unfortunately we only tested if the whole VSX was enabled, not if they were individually enabled. Fixes: 72cd7b44 ("powerpc: Uncomment and make enable_kernel_vsx() routine available") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [mpe: Backported due to changed context] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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