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Linux 6.11: add compat macro for page_mapping()

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Since the change to folios it has just been a wrapper anyway. Linux has
removed their wrapper, so we add one.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Sponsored-by: https://despairlabs.com/sponsor/
Closes #16400
This commit is contained in:
Rob Norris
2024-07-31 18:43:39 +10:00
committed by Tony Hutter
parent 11ad6124c3
commit 8156099cf2
5 changed files with 46 additions and 17 deletions
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include/os/linux/kernel/linux/mm_compat.h
+7
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@@ -21,16 +21,23 @@
/*
* Copyright (c) 2023, 2024, Klara Inc.
* Copyright (c) 2024, Rob Norris <robn@despairlabs.com>
*/
#ifndef _ZFS_MM_COMPAT_H
#define _ZFS_MM_COMPAT_H
#include <linux/mm.h>
#include <linux/pagemap.h>
/* 5.4 introduced page_size(). Older kernels can use a trivial macro instead */
#ifndef HAVE_MM_PAGE_SIZE
#define page_size(p) ((unsigned long)(PAGE_SIZE << compound_order(p)))
#endif
/* 6.11 removed page_mapping(). A simple wrapper around folio_mapping() works */
#ifndef HAVE_MM_PAGE_MAPPING
#define page_mapping(p) folio_mapping(page_folio(p))
#endif
#endif /* _ZFS_MM_COMPAT_H */