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s390/cache: prevent rebuild of shared_cpu_list
[ Upstream commitcb0cd4ee11
] With commit36bbc5b4ff
("cacheinfo: Allow early detection and population of cache attributes") the shared cpu list for each cache level higher than L1 is rebuilt even if the list already has been set up. This is caused by the removal of the cpumask_empty() check within cache_shared_cpu_map_setup(). However architectures can enforce that the shared cpu list is not rebuilt by simply setting cpu_map_populated of the per cpu cache info structure to true, which is also the fix for this problem. Before: $ cat /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_list 0-7 After: $ cat /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_list 1 Fixes:36bbc5b4ff
("cacheinfo: Allow early detection and population of cache attributes") Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -166,5 +166,6 @@ int populate_cache_leaves(unsigned int cpu)
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ci_leaf_init(this_leaf++, pvt, ctype, level, cpu);
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ci_leaf_init(this_leaf++, pvt, ctype, level, cpu);
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}
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}
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}
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}
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this_cpu_ci->cpu_map_populated = true;
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return 0;
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return 0;
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}
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}
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