78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
#ifndef _ZFS_PAGE_COMPAT_H
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#define _ZFS_PAGE_COMPAT_H
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/*
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* We have various enum members moving between two separate enum types,
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* and accessed by different functions at various times. Centralise the
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* insanity.
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*
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* < v4.8: all enums in zone_stat_item, via global_page_state()
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* v4.8: some enums moved to node_stat_item, global_node_page_state() introduced
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* v4.13: some enums moved from zone_stat_item to node_state_item
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* v4.14: global_page_state() rename to global_zone_page_state()
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*
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* The defines used here are created by config/kernel-global_page_state.m4
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*/
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/*
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* Create our own accessor functions to follow the Linux API changes
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*/
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#if defined(ZFS_GLOBAL_ZONE_PAGE_STATE)
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/* global_zone_page_state() introduced */
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#if defined(ZFS_ENUM_NODE_STAT_ITEM_NR_FILE_PAGES)
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#define nr_file_pages() global_node_page_state(NR_FILE_PAGES)
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#else
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#define nr_file_pages() global_zone_page_state(NR_FILE_PAGES)
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#endif
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#if defined(ZFS_ENUM_NODE_STAT_ITEM_NR_INACTIVE_ANON)
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#define nr_inactive_anon_pages() global_node_page_state(NR_INACTIVE_ANON)
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#else
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#define nr_inactive_anon_pages() global_zone_page_state(NR_INACTIVE_ANON)
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#endif
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#if defined(ZFS_ENUM_NODE_STAT_ITEM_NR_INACTIVE_FILE)
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#define nr_inactive_file_pages() global_node_page_state(NR_INACTIVE_FILE)
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#else
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#define nr_inactive_file_pages() global_zone_page_state(NR_INACTIVE_FILE)
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#endif
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#if defined(ZFS_ENUM_NODE_STAT_ITEM_NR_SLAB_RECLAIMABLE)
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#define nr_slab_reclaimable_pages() global_node_page_state(NR_SLAB_RECLAIMABLE)
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#else
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#define nr_slab_reclaimable_pages() global_zone_page_state(NR_SLAB_RECLAIMABLE)
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#endif
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#elif defined(ZFS_GLOBAL_NODE_PAGE_STATE)
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/* global_node_page_state() introduced */
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#if defined(ZFS_ENUM_NODE_STAT_ITEM_NR_FILE_PAGES)
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#define nr_file_pages() global_node_page_state(NR_FILE_PAGES)
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#else
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#define nr_file_pages() global_page_state(NR_FILE_PAGES)
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#endif
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#if defined(ZFS_ENUM_NODE_STAT_ITEM_NR_INACTIVE_ANON)
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#define nr_inactive_anon_pages() global_node_page_state(NR_INACTIVE_ANON)
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#else
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#define nr_inactive_anon_pages() global_page_state(NR_INACTIVE_ANON)
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#endif
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#if defined(ZFS_ENUM_NODE_STAT_ITEM_NR_INACTIVE_FILE)
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#define nr_inactive_file_pages() global_node_page_state(NR_INACTIVE_FILE)
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#else
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#define nr_inactive_file_pages() global_page_state(NR_INACTIVE_FILE)
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#endif
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#if defined(ZFS_ENUM_NODE_STAT_ITEM_NR_SLAB_RECLAIMABLE)
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#define nr_slab_reclaimable_pages() global_node_page_state(NR_SLAB_RECLAIMABLE)
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#else
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#define nr_slab_reclaimable_pages() global_page_state(NR_SLAB_RECLAIMABLE)
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#endif
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#else
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/* global_page_state() only */
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#define nr_file_pages() global_page_state(NR_FILE_PAGES)
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#define nr_inactive_anon_pages() global_page_state(NR_INACTIVE_ANON)
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#define nr_inactive_file_pages() global_page_state(NR_INACTIVE_FILE)
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#define nr_slab_reclaimable_pages() global_page_state(NR_SLAB_RECLAIMABLE)
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#endif /* ZFS_GLOBAL_ZONE_PAGE_STATE */
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#endif /* _ZFS_PAGE_COMPAT_H */
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