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ARC: Elide redundant setup of DMA callbacks

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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>
This commit is contained in:
Vineet Gupta 2016-06-13 16:38:27 +02:00
parent 18b43e89d2
commit 45c3b08a11
1 changed files with 9 additions and 0 deletions
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9
arch/arc/mm/cache.c
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@ -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;