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dnl #
dnl # 3.1 API change
dnl # The super_block structure now stores a per-filesystem shrinker.
dnl # This interface is preferable because it can be used to specifically
dnl # target only the zfs filesystem for pruning.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SHRINK], [
AC_MSG_CHECKING([whether super_block has s_shrink])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
int shrink(struct shrinker *s, struct shrink_control *sc)
{ return 0; }
static const struct super_block
sb __attribute__ ((unused)) = {
.s_shrink.shrink = shrink,
.s_shrink.seeks = DEFAULT_SEEKS,
.s_shrink.batch = 0,
};
],[
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SHRINK, 1, [struct super_block has s_shrink])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_NR_CACHED_OBJECTS], [
AC_MSG_CHECKING([whether sops->nr_cached_objects() exists])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
int nr_cached_objects(struct super_block *sb) { return 0; }
static const struct super_operations
sops __attribute__ ((unused)) = {
.nr_cached_objects = nr_cached_objects,
};
],[
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_NR_CACHED_OBJECTS, 1,
[sops->nr_cached_objects() exists])
],[
AC_MSG_RESULT(no)
])
])
AC_DEFUN([ZFS_AC_KERNEL_FREE_CACHED_OBJECTS], [
AC_MSG_CHECKING([whether sops->free_cached_objects() exists])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
void free_cached_objects(struct super_block *sb, int x)
{ return; }
static const struct super_operations
sops __attribute__ ((unused)) = {
.free_cached_objects = free_cached_objects,
};
],[
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_FREE_CACHED_OBJECTS, 1,
[sops->free_cached_objects() exists])
],[
AC_MSG_RESULT(no)
])
])
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