diff options
| author | Eric Dumazet | 2021-04-13 13:33:52 -0700 |
|---|---|---|
| committer | Peter Zijlstra | 2021-04-14 18:04:09 +0200 |
| commit | 5e0ccd4a3b01c5a71732a13186ca110a138516ea (patch) | |
| tree | 83297b8fe4f69131131ac5312aca86e76799568b /kernel/cpu.c | |
| parent | 0ed96051531ecc6965f6456d25b19b9b6bdb5c28 (diff) | |
rseq: Optimise rseq_get_rseq_cs() and clear_rseq_cs()
Commit ec9c82e03a74 ("rseq: uapi: Declare rseq_cs field as union,
update includes") added regressions for our servers.
Using copy_from_user() and clear_user() for 64bit values
is suboptimal.
We can use faster put_user() and get_user() on 64bit arches.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lkml.kernel.org/r/20210413203352.71350-4-eric.dumazet@gmail.com
Diffstat (limited to 'kernel/cpu.c')
0 files changed, 0 insertions, 0 deletions