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scst: Backport kernel_read() to kernel versions before v4.14 (merge r7880 from trunk)

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git-svn-id: http://svn.code.sf.net/p/scst/svn/branches/3.3.x@7886 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2019-01-13 21:22:05 +00:00
parent 2aad26460b
commit e55d5e7176
1 changed files with 27 additions and 0 deletions
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27
scst/include/backport.h
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@@ -406,6 +406,33 @@ static inline ssize_t call_write_iter(struct file *file, struct kiocb *kio,
}
#endif
/* See also commit bdd1d2d3d251 ("fs: fix kernel_read prototype") # v4.14 */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 0)
static inline ssize_t
kernel_read_backport(struct file *file, void *buf, size_t count, loff_t *pos)
{
return kernel_read(file, *pos, buf, count);
}
#define kernel_read(file, buf, count, pos) \
kernel_read_backport((file), (buf), (count), (pos))
/*
* See also commit 7bb307e894d5 ("export kernel_write(), convert open-coded
* instances") # v3.10.
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
static inline ssize_t
kernel_write_backport(struct file *file, void *buf, size_t count, loff_t *pos)
{
return kernel_write(file, *pos, buf, count);
}
#define kernel_write(file, buf, count, pos) \
kernel_write_backport((file), (buf), (count), (pos))
#endif
#endif
/* <linux/iocontext.h> */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25) || \
LINUX_VERSION_CODE >= KERNEL_VERSION(4, 21, 0)