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