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git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-29 13:23:23 +01:00
David Hildenbrand
f002882ca3
folio_is_secretmem() is currently only used during GUP-fast. Nowadays, folio_fast_pin_allowed() performs similar checks during GUP-fast and contains a lot of careful handling -- READ_ONCE() -- , sanity checks -- lockdep_assert_irqs_disabled() -- and helpful comments on how this handling is safe and correct. So let's merge folio_is_secretmem() into folio_fast_pin_allowed(). Rename folio_fast_pin_allowed() to gup_fast_folio_allowed(), to better match the new semantics. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: David Hildenbrand <[email protected]> Reviewed-by: Mike Rapoport (IBM) <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: Lorenzo Stoakes <[email protected]> Cc: Miklos Szeredi <[email protected]> Cc: xingwei lee <[email protected]> Cc: yue sun <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
37 lines
706 B
C
37 lines
706 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _LINUX_SECRETMEM_H
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#define _LINUX_SECRETMEM_H
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#ifdef CONFIG_SECRETMEM
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extern const struct address_space_operations secretmem_aops;
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static inline bool secretmem_mapping(struct address_space *mapping)
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{
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return mapping->a_ops == &secretmem_aops;
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}
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bool vma_is_secretmem(struct vm_area_struct *vma);
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bool secretmem_active(void);
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#else
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static inline bool vma_is_secretmem(struct vm_area_struct *vma)
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{
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return false;
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}
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static inline bool secretmem_mapping(struct address_space *mapping)
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{
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return false;
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}
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static inline bool secretmem_active(void)
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{
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return false;
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}
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#endif /* CONFIG_SECRETMEM */
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#endif /* _LINUX_SECRETMEM_H */
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