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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-03-30 15:07:47 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-04-09 17:27:00 +0530 |
| commit | fbf8e13d31bafd1fd1135627b1eaaf70520cb8ab (patch) | |
| tree | bb25980836831934977a6d72ad856292ee9bc8ce /arch/arc | |
| parent | 30ecee8cdd05415e5602bd755d9210e1c5a5b64d (diff) | |
| download | lwn-fbf8e13d31bafd1fd1135627b1eaaf70520cb8ab.tar.gz lwn-fbf8e13d31bafd1fd1135627b1eaaf70520cb8ab.zip | |
ARC: [kbuild] Allow platforms to disable LLSC for !SMP as well
Currently ARC_HAS_LLSC can be influenced by platform for SMP only using
ARC_HAS_COH_LLSC. For !SMP it defaults to "y".
It turns out that some customers can't support it all, even in UP.
So we change the semantics, and use a negative dependency ARC_CANT_LLSC.
Any platform (independent of SMP or !SMP) can select it to disable LLSC.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/Kconfig | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index e6f4eca09ee3..44541f14c692 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -134,9 +134,6 @@ if SMP config ARC_HAS_COH_CACHES def_bool n -config ARC_HAS_COH_LLSC - def_bool n - config ARC_HAS_COH_RTSC def_bool n @@ -304,6 +301,9 @@ config ARC_FPU_SAVE_RESTORE based on actual usage of FPU by a task. Thus our implemn does this for all tasks in system. +config ARC_CANT_LLSC + def_bool n + menuconfig ARC_CPU_REL_4_10 bool "Enable support for Rel 4.10 features" default n @@ -314,9 +314,7 @@ menuconfig ARC_CPU_REL_4_10 config ARC_HAS_LLSC bool "Insn: LLOCK/SCOND (efficient atomic ops)" default y - depends on ARC_CPU_770 - # if SMP, enable LLSC ONLY if ARC implementation has coherent atomics - depends on !SMP || ARC_HAS_COH_LLSC + depends on ARC_CPU_770 && !ARC_CANT_LLSC config ARC_HAS_SWAPE bool "Insn: SWAPE (endian-swap)" |