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ANDROID: vendor_hooks:vendor hook for mmput

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add vendor hook in mmput while mm_users decreased to 0.

Bug: 238821038
Change-Id: I42a717cbeeb3176bac14b4b2391fdb2366c972d3
Signed-off-by: xiaofeng <xiaofeng5@xiaomi.com>
This commit is contained in:
xiaofeng
2022-07-13 10:23:51 +08:00
committed by Todd Kjos
parent c96092a914
commit b9f272d887
3 changed files with 7 additions and 1 deletions
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3
include/trace/hooks/sched.h
View File

@@ -448,6 +448,9 @@ DECLARE_RESTRICTED_HOOK(android_rvh_update_rt_rq_load_avg,
TP_PROTO(u64 now, struct rq *rq, struct task_struct *tsk, int running),
TP_ARGS(now, rq, tsk, running), 1);
DECLARE_HOOK(android_vh_mmput,
TP_PROTO(struct mm_struct *mm),
TP_ARGS(mm));
/* macro versions of hooks are no longer required */
#endif /* _TRACE_HOOK_SCHED_H */

4
kernel/fork.c
View File

@@ -1180,8 +1180,10 @@ void mmput(struct mm_struct *mm)
{
might_sleep();
if (atomic_dec_and_test(&mm->mm_users))
if (atomic_dec_and_test(&mm->mm_users)) {
trace_android_vh_mmput(mm);
__mmput(mm);
}
}
EXPORT_SYMBOL_GPL(mmput);

1
kernel/sched/vendor_hooks.c
View File

@@ -130,3 +130,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_update_load_avg);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_remove_entity_load_avg);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_update_blocked_fair);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_update_rt_rq_load_avg);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_mmput);