The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/config/kernel-fadvise.m4

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    1 dnl #
    2 dnl # Linux 4.19 API
    3 dnl #
    4 AC_DEFUN([ZFS_AC_KERNEL_SRC_FADVISE], [
    5         ZFS_LINUX_TEST_SRC([file_fadvise], [
    6                 #include <linux/fs.h>
    7 
    8                 static const struct file_operations
    9                     fops __attribute__ ((unused)) = {
   10                         .fadvise = NULL,
   11                 };
   12         ],[])
   13 ])
   14 
   15 AC_DEFUN([ZFS_AC_KERNEL_FADVISE], [
   16         AC_MSG_CHECKING([whether fops->fadvise() exists])
   17         ZFS_LINUX_TEST_RESULT([file_fadvise], [
   18                 AC_MSG_RESULT(yes)
   19                 AC_DEFINE(HAVE_FILE_FADVISE, 1, [fops->fadvise() exists])
   20         ],[
   21                 AC_MSG_RESULT(no)
   22         ])
   23 ])

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