73 lines
1.7 KiB
Plaintext
73 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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int shrink(struct shrinker *s, struct shrink_control *sc)
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{ return 0; }
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static const struct super_block
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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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],[
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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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int nr_cached_objects(struct super_block *sb) { return 0; }
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static const struct super_operations
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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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],[
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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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void free_cached_objects(struct super_block *sb, int x)
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{ return; }
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static const struct super_operations
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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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],[
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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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