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scst/include/backport.h: backport WRITE_ONCE for kernels < 3.19

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READ_ONCE was already backported; WRITE_ONCE was not, causing a build
failure on 3.10.  Add the matching definition following the same pattern.
This commit is contained in:
Brian M
2026-03-26 12:22:41 -07:00
committed by Gleb Chesnokov
parent a4a55aab41
commit 7ab9df00f5
1 changed files with 7 additions and 0 deletions
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7
scst/include/backport.h
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@@ -427,7 +427,14 @@ static inline void be32_to_cpu_array(u32 *dst, const __be32 *src, size_t len)
* 230fa253df6352af12ad0a16128760b5cb3f92df).
*/
#define READ_ONCE(x) (*(volatile typeof(x) *)&(x))
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 19, 0) && !defined(WRITE_ONCE)
/*
* See also patch "Change ASSIGN_ONCE(val, x) to WRITE_ONCE(x, val)" (commit ID
* 43239cbe79fc369f5d2160bd7f69e28b5c50a58c).
*/
#define WRITE_ONCE(x, val) (*(volatile typeof(x) *)&(x) = (val))
#endif
/* <linux/compiler_attributes.h> */