[RFT PATCH v1 5/7] arm64: reuse FPSIMD hardware context if possible

2013-09-27 Thread Jiang Liu
From: Jiang Liu Reuse FPSIMD hardware context if it hasn't been touched by other thread yet, so we can get rid of unnecessary FPSIMD context restores. This is especially useful when switching between kernel thread and user thread because kernel thread usaually doesn't touch FPSIMD registers.

[RFT PATCH v1 5/7] arm64: reuse FPSIMD hardware context if possible

2013-09-27 Thread Jiang Liu
From: Jiang Liu jiang@huawei.com Reuse FPSIMD hardware context if it hasn't been touched by other thread yet, so we can get rid of unnecessary FPSIMD context restores. This is especially useful when switching between kernel thread and user thread because kernel thread usaually doesn't touch