diff options
author | Vineet Gupta <vgupta@synopsys.com> | 2016-06-13 17:38:27 +0300 |
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committer | Vineet Gupta <vgupta@synopsys.com> | 2016-08-10 20:16:46 +0300 |
commit | 45c3b08a117e2232fc8d7b9e849ead36386f4f96 (patch) | |
tree | fe8d92ab12ffe55a79de6a2a183f5150991988e0 /arch | |
parent | 18b43e89d295cc65151c505c643c98fb2c320e59 (diff) | |
download | linux-45c3b08a117e2232fc8d7b9e849ead36386f4f96.tar.xz |
ARC: Elide redundant setup of DMA callbacks
For resources shared by all cores such as SLC and IOC, only the master
core needs to do any setups / enabling / disabling etc.
Cc: <stable@vger.kernel.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arc/mm/cache.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c index 5a294b2c3cb3..0b10efe3a6a7 100644 --- a/arch/arc/mm/cache.c +++ b/arch/arc/mm/cache.c @@ -921,6 +921,15 @@ void arc_cache_init(void) printk(arc_cache_mumbojumbo(0, str, sizeof(str))); + /* + * Only master CPU needs to execute rest of function: + * - Assume SMP so all cores will have same cache config so + * any geomtry checks will be same for all + * - IOC setup / dma callbacks only need to be setup once + */ + if (cpu) + return; + if (IS_ENABLED(CONFIG_ARC_HAS_ICACHE)) { struct cpuinfo_arc_cache *ic = &cpuinfo_arc700[cpu].icache; |