config/kernel-kmem-cache.m4

   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 ])