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| author | Guo Ren <guoren@linux.alibaba.com> | 2019-12-17 11:12:55 +0800 |
|---|---|---|
| committer | Guo Ren <guoren@linux.alibaba.com> | 2020-02-21 15:43:24 +0800 |
| commit | f8e17c17b81070f38062dce79ca7f4541851dadd (patch) | |
| tree | 0de930c6cf557570a44beb5c167384ca0692d791 /kernel | |
| parent | 7f4a567332f035ab16b29010fbd04a0f10183c77 (diff) | |
| download | linux-next-f8e17c17b81070f38062dce79ca7f4541851dadd.tar.gz | |
csky: Set regs->usp to kernel sp, when the exception is from kernel
In the past, we didn't care about kernel sp when saving pt_reg. But in some
cases, we still need pt_reg->usp to represent the kernel stack before enter
exception.
For cmpxhg in atomic.S, we need save and restore usp for above.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions