From: Jiang Liu <jiang.liu@huawei.com>
Date: Fri, 27 Sep 2013 08:04:41 +0000 (+0100)
Subject: arm64: fix possible invalid FPSIMD initialization state
X-Git-Tag: v3.12-rc4~18^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6db83cea1c975b9a102e17def7d2795814e1ae2b;p=pandora-kernel.git

arm64: fix possible invalid FPSIMD initialization state

If context switching happens during executing fpsimd_flush_thread(),
stale value in FPSIMD registers will be saved into current thread's
fpsimd_state by fpsimd_thread_switch(). That may cause invalid
initialization state for the new process, so disable preemption
when executing fpsimd_flush_thread().

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Jiang Liu <liuj97@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---

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