58 lines
1.3 KiB
Plaintext
58 lines
1.3 KiB
Plaintext
dnl #
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dnl # 4.14 API change
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dnl # kernel_write() which was introduced in 3.9 was updated to take
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dnl # the offset as a pointer which is needed by vn_rdwr().
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_WRITE], [
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AC_MSG_CHECKING([whether kernel_write() takes loff_t pointer])
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tmp_flags="$EXTRA_KCFLAGS"
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EXTRA_KCFLAGS="-Werror"
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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],[
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struct file *file = NULL;
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const void *buf = NULL;
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size_t count = 0;
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loff_t *pos = NULL;
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ssize_t ret;
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ret = kernel_write(file, buf, count, pos);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_KERNEL_WRITE_PPOS, 1,
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[kernel_write() take loff_t pointer])
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],[
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AC_MSG_RESULT(no)
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])
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EXTRA_KCFLAGS="$tmp_flags"
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])
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dnl #
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dnl # 4.14 API change
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dnl # kernel_read() which has existed for forever was updated to take
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dnl # the offset as a pointer which is needed by vn_rdwr().
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_READ], [
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AC_MSG_CHECKING([whether kernel_read() takes loff_t pointer])
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tmp_flags="$EXTRA_KCFLAGS"
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EXTRA_KCFLAGS="-Werror"
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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],[
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struct file *file = NULL;
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void *buf = NULL;
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size_t count = 0;
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loff_t *pos = NULL;
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ssize_t ret;
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ret = kernel_read(file, buf, count, pos);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_KERNEL_READ_PPOS, 1,
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[kernel_read() take loff_t pointer])
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],[
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AC_MSG_RESULT(no)
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])
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EXTRA_KCFLAGS="$tmp_flags"
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])
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