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由 Russell King 提交于
PTRACE_SETVFPREGS fails to properly mark the VFP register set to be reloaded, because it undoes one of the effects of vfp_flush_hwstate(). Specifically vfp_flush_hwstate() sets thread->vfpstate.hard.cpu to an invalid CPU number, but vfp_set() overwrites this with the original CPU number, thereby rendering the hardware state as apparently "valid", even though the software state is more recent. Fix this by reverting the previous change. Cc: <stable@vger.kernel.org> Fixes: 8130b9d7 ("ARM: 7308/1: vfp: flush thread hwstate before copying ptrace registers") Acked-by: NWill Deacon <will.deacon@arm.com> Tested-by: NSimon Marchi <simon.marchi@ericsson.com> Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
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