mirror_zfs/include/os/linux/kernel/linux/page_compat.h
Matthew Macy 006e9a4088 OpenZFS restructuring - move platform specific headers
Move platform specific Linux headers under include/os/linux/.
Update the build system accordingly to detect the platform.
This lays some of the initial groundwork to supporting building
for other platforms.

As part of this change it was necessary to create both a user
and kernel space sys/simd.h header which can be included in
either context.  No functional change, the source has been
refactored and the relevant #include's updated.

Reviewed-by: Jorgen Lundman <lundman@lundman.net>
Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Signed-off-by: Matthew Macy <mmacy@FreeBSD.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #9198
2019-09-05 09:34:54 -07:00

79 lines
2.8 KiB
C

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