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| author | Jiang Liu <jiang.liu@huawei.com> | 2013-09-27 04:04:41 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-09 15:24:26 -0500 |
| commit | 2bf5861acf602fe6201ac1f82955ac7283e56b6f (patch) | |
| tree | a9ce744c6ef2bd2b42ac4a54d712e4f2fe6e22f1 /mm | |
| parent | 79f783f05539479676406d3d42c3d86bd203f083 (diff) | |
arm64: fix possible invalid FPSIMD initialization state
commit 6db83cea1c975b9a102e17def7d2795814e1ae2b upstream.
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>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions