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brick: safeguard smp_mb and barrier

This commit is contained in:
Thomas Schoebel-Theuer 2023-02-23 17:13:18 +01:00
parent c8841486bd
commit ee55f32605
1 changed files with 4 additions and 1 deletions
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5
kernel/brick.h
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@ -62,7 +62,7 @@
#define brick_msleep(msecs) _brick_msleep(msecs, false) #define brick_msleep(msecs) _brick_msleep(msecs, false)
extern int _brick_msleep(int msecs, bool shorten); extern int _brick_msleep(int msecs, bool shorten);
#define brick_yield() cond_resched() #define brick_yield() ({ barrier(); cond_resched(); })
///////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////
@ -754,6 +754,7 @@ typedef enum brick_switch {
int _err; \ int _err; \
\ \
flush_signals(current); \ flush_signals(current); \
smp_mb(); \
_thr = kthread_create(_thread_fn, _data, _fmt, ##_args); \ _thr = kthread_create(_thread_fn, _data, _fmt, ##_args); \
if (likely(!IS_ERR(_thr))) \ if (likely(!IS_ERR(_thr))) \
break; \ break; \
@ -777,6 +778,7 @@ typedef enum brick_switch {
get_task_struct(_thr); \ get_task_struct(_thr); \
wake_up_process(_thr); \ wake_up_process(_thr); \
} \ } \
smp_mb(); \
_thr; \ _thr; \
}) })
@ -791,6 +793,7 @@ typedef enum brick_switch {
__REMOVE_FROM_SAY_CHANNEL(__thread__); \ __REMOVE_FROM_SAY_CHANNEL(__thread__); \
put_task_struct(__thread__); \ put_task_struct(__thread__); \
(_thread) = NULL; \ (_thread) = NULL; \
smp_mb(); \
} \ } \
} while (0) } while (0)