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Linux 3.15 commit torvalds/linux@293bc98 introduced two new methods. The ->read_iter() and ->write_iter() methods were designed to replace the ->aio_read() and ->aio_write() interfaces. Both interfaces were preserved for several kernel releases in order to migrate all existing consumers to the new interfaces. But as of Linux 4.1 the legacy interface has been retired and the ZFS code must be updated to use the new interfaces. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #3352
28 lines
648 B
Plaintext
28 lines
648 B
Plaintext
dnl #
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dnl # Linux 4.1.x API
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_VFS_RW_ITERATE],
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[AC_MSG_CHECKING([whether fops->read/write_iter() are available])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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ssize_t test_read(struct kiocb *kiocb, struct iov_iter *to)
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{ return 0; }
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ssize_t test_write(struct kiocb *kiocb, struct iov_iter *from)
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{ return 0; }
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static const struct file_operations
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fops __attribute__ ((unused)) = {
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.read_iter = test_read,
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.write_iter = test_write,
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};
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],[
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_VFS_RW_ITERATE, 1,
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[fops->read/write_iter() are available])
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],[
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AC_MSG_RESULT(no)
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])
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])
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