73 lines
1.9 KiB
Plaintext
73 lines
1.9 KiB
Plaintext
dnl #
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dnl # 2.6.35 API change,
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dnl # The cachep->gfpflags member was renamed cachep->allocflags. These are
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dnl # private allocation flags which are applied when allocating a new slab
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dnl # in kmem_getpages(). Unfortunately there is no public API for setting
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dnl # non-default flags.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_KMEM_CACHE_ALLOCFLAGS], [
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AC_MSG_CHECKING([whether struct kmem_cache has allocflags])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/slab.h>
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],[
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struct kmem_cache cachep __attribute__ ((unused));
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cachep.allocflags = GFP_KERNEL;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_KMEM_CACHE_ALLOCFLAGS, 1,
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[struct kmem_cache has allocflags])
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],[
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AC_MSG_RESULT(no)
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AC_MSG_CHECKING([whether struct kmem_cache has gfpflags])
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/slab.h>
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],[
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struct kmem_cache cachep __attribute__ ((unused));
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cachep.gfpflags = GFP_KERNEL;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_KMEM_CACHE_GFPFLAGS, 1,
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[struct kmem_cache has gfpflags])
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],[
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AC_MSG_RESULT(no)
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])
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])
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])
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dnl #
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dnl # grsecurity API change,
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dnl # kmem_cache_create() with SLAB_USERCOPY flag replaced by
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dnl # kmem_cache_create_usercopy().
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_KMEM_CACHE_CREATE_USERCOPY], [
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AC_MSG_CHECKING([whether kmem_cache_create_usercopy() exists])
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tmp_flags="$EXTRA_KCFLAGS"
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EXTRA_KCFLAGS="-Werror"
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/slab.h>
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static void ctor(void *foo)
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{
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// fake ctor
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}
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],[
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struct kmem_cache *skc_linux_cache;
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const char *name = "test";
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size_t size = 4096;
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size_t align = 8;
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unsigned long flags = 0;
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size_t useroffset = 0;
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size_t usersize = size - useroffset;
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skc_linux_cache = kmem_cache_create_usercopy(
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name, size, align, flags, useroffset, usersize, ctor);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_KMEM_CACHE_CREATE_USERCOPY, 1,
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[kmem_cache_create_usercopy() exists])
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],[
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AC_MSG_RESULT(no)
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])
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EXTRA_KCFLAGS="$tmp_flags"
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])
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