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ANDROID: scheduler: add vendor-specific wake flag

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It comes with the commit efbb82d3b0db ("ANDROID: Add a vendor hook
that allow a module to modify the wake flag"). A vendor who want to
hook sock_def_readable can set this vendor-specific wake flag.

sock_def_readable ->
(vendor hook will call __wake_up_sync_key with a custom mode) ->
__wake_up_sync_key ->
(vendor hook changes wake_flags per the custom mode) ->
__wake_up_common -> default_wake_function

It is an Android-specific since it works with a vendor hook.

Bug: 189858948
Bug: 226256614
Bug: 263838089
Signed-off-by: Namkyu Kim <namkyu78.kim@samsung.com>
Change-Id: Idc23c1c47f7d83b298c0b2560859f1ce2761fd85
(cherry picked from commit 4c1097df5d)
(cherry picked from commit 87b89ce83b)
Signed-off-by: Dongseok Yi <dseok.yi@samsung.com>
This commit is contained in:
Namkyu Kim
2021-06-02 14:56:16 +09:00
committed by Treehugger Robot
parent e97fed2856
commit ffb7f4adfc
2 changed files with 3 additions and 1 deletions
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2
kernel/sched/core.c
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@@ -6949,7 +6949,7 @@ asmlinkage __visible void __sched preempt_schedule_irq(void)
int default_wake_function(wait_queue_entry_t *curr, unsigned mode, int wake_flags,
void *key)
{
WARN_ON_ONCE(IS_ENABLED(CONFIG_SCHED_DEBUG) && wake_flags & ~WF_SYNC);
WARN_ON_ONCE(IS_ENABLED(CONFIG_SCHED_DEBUG) && wake_flags & ~(WF_SYNC | WF_ANDROID_VENDOR));
return try_to_wake_up(curr->private, mode, wake_flags);
}
EXPORT_SYMBOL(default_wake_function);

2
kernel/sched/sched.h
View File

@@ -2100,6 +2100,8 @@ static inline int task_on_rq_migrating(struct task_struct *p)
#define WF_SYNC 0x10 /* Waker goes to sleep after wakeup */
#define WF_MIGRATED 0x20 /* Internal use, task got migrated */
#define WF_ANDROID_VENDOR 0x1000 /* Vendor specific for Android */
#ifdef CONFIG_SMP
static_assert(WF_EXEC == SD_BALANCE_EXEC);
static_assert(WF_FORK == SD_BALANCE_FORK);