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author | Sasha Levin <alexander.levin@verizon.com> | 2016-08-31 05:04:29 +0300 |
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committer | Sasha Levin <alexander.levin@verizon.com> | 2016-09-01 05:05:44 +0300 |
commit | cc2082d16b1dd1df4f10c56ad98cb266064799a5 (patch) | |
tree | 2c45ca183f7e6c2229e3012fc92b6e416ea4eef7 /arch/arc | |
parent | 63998a4d6d38779daef8062a8f8755e22b50cc22 (diff) | |
download | linux-cc2082d16b1dd1df4f10c56ad98cb266064799a5.tar.xz |
ARC: Elide redundant setup of DMA callbacks
[ Upstream commit 45c3b08a117e2232fc8d7b9e849ead36386f4f96 ]
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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'arch/arc')
-rw-r--r-- | arch/arc/mm/cache_arc700.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arc/mm/cache_arc700.c b/arch/arc/mm/cache_arc700.c index 8c3a3e02ba92..2147ca2bc131 100644 --- a/arch/arc/mm/cache_arc700.c +++ b/arch/arc/mm/cache_arc700.c @@ -155,6 +155,15 @@ 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; |