[PATCH 4.18 31/34] x86/percpu: Fix this_cpu_read()

4.18-stable review patch. If anyone has any objections, please let me know. -- From: Peter Zijlstra commit b59167ac7bafd804c91e49ad53c6d33a7394d4c8 upstream. Eric reported that a sequence count loop using this_cpu_read() got optimized out. This is wrong, this_cpu_read() must

[PATCH 4.18 31/34] x86/percpu: Fix this_cpu_read()

4.18-stable review patch. If anyone has any objections, please let me know. -- From: Peter Zijlstra commit b59167ac7bafd804c91e49ad53c6d33a7394d4c8 upstream. Eric reported that a sequence count loop using this_cpu_read() got optimized out. This is wrong, this_cpu_read() must