Add KMC_SLAB cache type

[mirror_spl.git] / config / spl-build.m4

diff --git a/config/spl-build.m4 b/config/spl-build.m4
index 08b84efe9474d3440a4ac848e0c67eab7ea943f9..eef52334fb10532d00351607990534e50be0777e 100644 (file)
--- a/config/spl-build.m4
+++ b/config/spl-build.m4
@@ -93,6 +93,7 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
        SPL_AC_SCHED_RT_HEADER
        SPL_AC_2ARGS_VFS_GETATTR
        SPL_AC_USLEEP_RANGE
+       SPL_AC_KMEM_CACHE_ALLOCFLAGS
 ])
 
 AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
@@ -2532,3 +2533,40 @@ AC_DEFUN([SPL_AC_USLEEP_RANGE], [
                AC_MSG_RESULT(no)
        ])
 ])
+
+dnl #
+dnl # 2.6.35 API change,
+dnl # The cachep->gfpflags member was renamed cachep->allocflags.  These are
+dnl # private allocation flags which are applied when allocating a new slab
+dnl # in kmem_getpages().  Unfortunately there is no public API for setting
+dnl # non-default flags.
+dnl #
+AC_DEFUN([SPL_AC_KMEM_CACHE_ALLOCFLAGS], [
+       AC_MSG_CHECKING([whether struct kmem_cache has allocflags])
+       SPL_LINUX_TRY_COMPILE([
+               #include <linux/slab.h>
+       ],[
+               struct kmem_cache cachep __attribute__ ((unused));
+               cachep.allocflags = GFP_KERNEL;
+       ],[
+               AC_MSG_RESULT(yes)
+               AC_DEFINE(HAVE_KMEM_CACHE_ALLOCFLAGS, 1,
+                       [struct kmem_cache has allocflags])
+       ],[
+               AC_MSG_RESULT(no)
+
+               AC_MSG_CHECKING([whether struct kmem_cache has gfpflags])
+               SPL_LINUX_TRY_COMPILE([
+                       #include <linux/slab.h>
+               ],[
+                       struct kmem_cache cachep __attribute__ ((unused));
+                       cachep.gfpflags = GFP_KERNEL;
+               ],[
+                       AC_MSG_RESULT(yes)
+                       AC_DEFINE(HAVE_KMEM_CACHE_GFPFLAGS, 1,
+                               [struct kmem_cache has gfpflags])
+               ],[
+                       AC_MSG_RESULT(no)
+               ])
+       ])
+])