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backport ACCESS_ONCE() before 2.6.26

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Signed-off-by: David Butterfield <dab21774@gmail.com>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7126 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2017-04-14 01:19:06 +00:00
parent c98eb43f55
commit 57ee5e39ab
1 changed files with 5 additions and 0 deletions
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5
scst/include/backport.h
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@@ -76,6 +76,11 @@ static inline unsigned int queue_max_hw_sectors(struct request_queue *q)
* 230fa253df6352af12ad0a16128760b5cb3f92df).
*/
#define READ_ONCE(x) (*(volatile typeof(x) *)&(x))
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
#define ACCESS_ONCE(x) READ_ONCE(x)
#endif
#endif
/* <linux/cpumask.h> */