delayacct: cleanup flags in struct task_delay_info and functions use it

Flags in struct task_delay_info is used to distinguish the difference
between swapin and blkio delay acountings.  But after patch "delayacct:
support swapin delay accounting for swapping without blkio", there is no
need to do that since swapin and blkio delay accounting use their own
functions.

Link: https://lkml.kernel.org/r/20211124065958.36703-1-yang.yang29@zte.com.cn
Signed-off-by: Yang Yang <yang.yang29@zte.com.cn>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/delayacct.h b/include/linux/delayacct.h
index c675cfb..435c365 100644 (file)
--- a/include/linux/delayacct.h
+++ b/include/linux/delayacct.h
@@ -12,7 +12,6 @@
 #ifdef CONFIG_TASK_DELAY_ACCT
 struct task_delay_info {
        raw_spinlock_t  lock;
-       unsigned int    flags;  /* Private per-task flags */
 
        /* For each stat XXX, add following, aligned appropriately
         *
@@ -74,18 +73,6 @@ extern void __delayacct_thrashing_end(void);
 extern void __delayacct_swapin_start(void);
 extern void __delayacct_swapin_end(void);
 
-static inline void delayacct_set_flag(struct task_struct *p, int flag)
-{
-       if (p->delays)
-               p->delays->flags |= flag;
-}
-
-static inline void delayacct_clear_flag(struct task_struct *p, int flag)
-{
-       if (p->delays)
-               p->delays->flags &= ~flag;
-}
-
 static inline void delayacct_tsk_init(struct task_struct *tsk)
 {
        /* reinitialize in case parent's non-null pointer was dup'ed*/
@@ -184,10 +171,6 @@ static inline void delayacct_swapin_end(void)
 }
 
 #else
-static inline void delayacct_set_flag(struct task_struct *p, int flag)
-{}
-static inline void delayacct_clear_flag(struct task_struct *p, int flag)
-{}
 static inline void delayacct_init(void)
 {}
 static inline void delayacct_tsk_init(struct task_struct *tsk)