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2023-11-07 5e8555e3ea324daaf0e38422bcba48c4df33a0d9

 kernel/fs/autofs/expire.c
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@@ -8,6 +8,7 @@
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  * option, any later version, incorporated herein by reference.
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  */
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+#include <linux/delay.h>
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 #include "autofs_i.h"
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 /* Check if a dentry can be expired */
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@@ -153,7 +154,7 @@
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 			parent = p->d_parent;
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 			if (!spin_trylock(&parent->d_lock)) {
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 				spin_unlock(&p->d_lock);
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-				cpu_relax();
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+				cpu_chill();
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 				goto relock;
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 			}
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 			spin_unlock(&p->d_lock);