| commit | 837e72f78a72ef43a0c5e179f3addadb2a225f80 | [log] [tgz] |
|---|---|---|
| author | Nicholas Piggin <npiggin@gmail.com> | Fri Jun 09 01:36:07 2017 +1000 |
| committer | Michael Ellerman <mpe@ellerman.id.au> | Thu Jun 15 16:34:39 2017 +1000 |
| tree | 4a16400f9dc5667da0e16a4ac9cbf9764773f21d | |
| parent | e4c0fc5f72bca11432297168338aef46c12793a4 [diff] |
powerpc/64: Drop reservation-clearing ldarx in context switch There is no need to explicitly break the reservation in _switch, because we are guaranteed that the context switch path will include a larx/stcx. Comment the guarantee and remove the reservation clear from _switch. This is worth 1-2% in context switch performance. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>