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qla2x00t-32gbit: Backport to older kernel versions

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@9307 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2020-12-31 16:59:15 +00:00
parent 4664d87d6a
commit ea7fac484e
3 changed files with 63 additions and 1 deletions
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scst/include/backport.h
+56
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@@ -381,6 +381,40 @@ static inline bool cpumask_equal(const cpumask_t *src1p,
}
#endif
/* <linux/debugfs.h> */
/*
* See also commit c64688081490 ("debugfs: add support for self-protecting
* attribute file fops") # v4.7.
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt) \
static int __fops ## _open(struct inode *inode, struct file *file) \
{ \
__simple_attr_check_format(__fmt, 0ull); \
return simple_attr_open(inode, file, __get, __set, __fmt); \
} \
static const struct file_operations __fops = { \
.owner = THIS_MODULE, \
.open = __fops ## _open, \
.release = simple_attr_release, \
.read = debugfs_attr_read, \
.write = debugfs_attr_write, \
.llseek = no_llseek, \
}
static inline ssize_t debugfs_attr_read(struct file *file, char __user *buf,
size_t len, loff_t *ppos)
{
return -ENOENT;
}
static inline ssize_t debugfs_attr_write(struct file *file,
const char __user *buf, size_t len, loff_t *ppos)
{
return -ENOENT;
}
#endif
/* <linux/device.h> */
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 11, 0)
@@ -1683,6 +1717,28 @@ static inline void sg_unmark_end(struct scatterlist *sg)
#define MIN_NICE -20
#endif
/* <linux/seq_file.h> */
/*
* See also commit a08f06bb7a07 ("seq_file: Introduce DEFINE_SHOW_ATTRIBUTE()
* helper macro") # v4.16.
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)
#define DEFINE_SHOW_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, \
.llseek = seq_lseek, \
.release = single_release, \
}
#endif
/* <linux/slab.h> */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22)