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(parent: fc18047) | patch
arm64: fix possible invalid FPSIMD initialization state
authorJiang Liu <jiang.liu@huawei.com>
Fri, 27 Sep 2013 08:04:41 +0000 (09:04 +0100)
committerCatalin Marinas <catalin.marinas@arm.com>
Fri, 27 Sep 2013 17:21:37 +0000 (18:21 +0100)
commit6db83cea1c975b9a102e17def7d2795814e1ae2b
tree8bb027ee7d2738649783800354f88de59580d9cdtree | snapshot (tar.gz zip)
parentfc18047c732f6becba92618a397555927687efd3commit | diff
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>
arch/arm64/kernel/fpsimd.c diff | blob | blame | history