Commit 45c3b08a authored by Vineet Gupta's avatar Vineet Gupta
Browse files

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: default avatarVineet Gupta <vgupta@synopsys.com>
parent 18b43e89

arch/arc/mm/cache.c

+9 −0
Original line number Diff line number Diff line
@@ -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;