hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8T2RT -------------------------------- The fixes tag patch resolves the lockdep warning. However, directly removing rdt_last_cmd_clear() would leave the last_cmd_status interface with stale logs, which does not conform to the functional definition before the fix. Therefore, the rdt_last_cmd_clear() operation is performed after successfully acquiring the rdtgroup_mutex. Fixes: c8eafe149530 ("x86/resctrl: Fix potential lockdep warning") Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- fs/resctrl/rdtgroup.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c index a42da66ae88e..b97d49f01b1c 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -527,6 +527,8 @@ static ssize_t rdtgroup_cpus_write(struct kernfs_open_file *of, goto unlock; } + rdt_last_cmd_clear(); + if (rdtgrp->mode == RDT_MODE_PSEUDO_LOCKED || rdtgrp->mode == RDT_MODE_PSEUDO_LOCKSETUP) { ret = -EINVAL; @@ -3266,6 +3268,8 @@ static int mkdir_rdt_prepare(struct kernfs_node *parent_kn, goto out_unlock; } + rdt_last_cmd_clear(); + if (rtype == RDTMON_GROUP && (prdtgrp->mode == RDT_MODE_PSEUDO_LOCKSETUP || prdtgrp->mode == RDT_MODE_PSEUDO_LOCKED)) { -- 2.25.1