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| author | Vineet Gupta <Vineet.Gupta1@synopsys.com> | 2016-11-07 16:31:39 -0800 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2016-11-13 13:44:35 +0100 |
| commit | 17ea4f9622a80cc8717beeefe1371ccbcd501fe3 (patch) | |
| tree | c27a5c82a37d4543e4d85225cbe0834bfcbb9f4f | |
| parent | 0ef881ce9568e1c2e98351fdc067bebbc8c4696a (diff) | |
ARC: introduce explicit support for atomics
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
| -rw-r--r-- | extra/Configs/Config.arc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/extra/Configs/Config.arc b/extra/Configs/Config.arc index 0c0bc71ce..c263dbf46 100644 --- a/extra/Configs/Config.arc +++ b/extra/Configs/Config.arc @@ -28,6 +28,14 @@ config CONFIG_ARC_CPU_HS endchoice +config CONFIG_ARC_HAS_ATOMICS + bool "Support for LLOCK/SCOND instructions" + default y + help + LLOCK/SCOND instructions are needed to implement atomic r-m-w + Otherwise libc needs kernel assisted atomic cmpxchg available + since v4.9 kernel + choice prompt "MMU Page Size" default CONFIG_ARC_PAGE_SIZE_8K |