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-kmem-cache.m4

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    1 dnl #
    2 dnl # grsecurity API change,
    3 dnl # kmem_cache_create() with SLAB_USERCOPY flag replaced by
    4 dnl # kmem_cache_create_usercopy().
    5 dnl #
    6 AC_DEFUN([ZFS_AC_KERNEL_SRC_KMEM_CACHE_CREATE_USERCOPY], [
    7         ZFS_LINUX_TEST_SRC([kmem_cache_create_usercopy], [
    8                 #include <linux/slab.h>
    9                 static void ctor(void *foo) { /* fake ctor */ }
   10         ],[
   11                 struct kmem_cache *skc_linux_cache;
   12                 const char *name = "test";
   13                 size_t size = 4096;
   14                 size_t align = 8;
   15                 unsigned long flags = 0;
   16                 size_t useroffset = 0;
   17                 size_t usersize = size - useroffset;
   18 
   19                 skc_linux_cache = kmem_cache_create_usercopy(
   20                     name, size, align, flags, useroffset, usersize, ctor);
   21         ])
   22 ])
   23 
   24 AC_DEFUN([ZFS_AC_KERNEL_KMEM_CACHE_CREATE_USERCOPY], [
   25         AC_MSG_CHECKING([whether kmem_cache_create_usercopy() exists])
   26         ZFS_LINUX_TEST_RESULT([kmem_cache_create_usercopy], [
   27                 AC_MSG_RESULT(yes)
   28                 AC_DEFINE(HAVE_KMEM_CACHE_CREATE_USERCOPY, 1,
   29                     [kmem_cache_create_usercopy() exists])
   30         ],[
   31                 AC_MSG_RESULT(no)
   32         ])
   33 ])
   34 
   35 AC_DEFUN([ZFS_AC_KERNEL_SRC_KMEM_CACHE], [
   36         ZFS_AC_KERNEL_SRC_KMEM_CACHE_CREATE_USERCOPY
   37 ])
   38 
   39 AC_DEFUN([ZFS_AC_KERNEL_KMEM_CACHE], [
   40         ZFS_AC_KERNEL_KMEM_CACHE_CREATE_USERCOPY
   41 ])

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