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scst/include/backport.h: Backport DEFINE_SHOW_STORE_ATTRIBUTE()

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Support the previous commit against kernel versions before v6.7.

See also commit 9cba82bba500 ("seq_file: add helper macro to define
attribute for rw file") # v6.7.
This commit is contained in:
Gleb Chesnokov
2024-04-25 16:14:58 +03:00
parent 1ea7200d55
commit e322287f89
1 changed files with 21 additions and 0 deletions
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21
scst/include/backport.h
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@@ -1354,6 +1354,27 @@ static const struct file_operations __name ## _fops = { \
}
#endif
/*
* See also commit 9cba82bba500 ("seq_file: add helper macro to define
* attribute for rw file") # v6.7.
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 7, 0)
#define DEFINE_SHOW_STORE_ATTRIBUTE(__name) \
static int __name ## _open(struct inode *inode, struct file *file) \
{ \
return single_open(file, __name ## _show, inode->i_private); \
} \
\
static const struct file_operations __name ## _fops = { \
.owner = THIS_MODULE, \
.open = __name ## _open, \
.read = seq_read, \
.write = __name ## _write, \
.llseek = seq_lseek, \
.release = single_release, \
}
#endif
/* <linux/slab.h> */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0) && \