forked from mirrors/linux
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/20240326143210.291116-4-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: Lorenzo Stoakes <lstoakes@gmail.com> Cc: Miklos Szeredi <mszeredi@redhat.com> Cc: xingwei lee <xrivendell7@gmail.com> Cc: yue sun <samsun1006219@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
36 lines
706 B
C
36 lines
706 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
#ifndef _LINUX_SECRETMEM_H
|
|
#define _LINUX_SECRETMEM_H
|
|
|
|
#ifdef CONFIG_SECRETMEM
|
|
|
|
extern const struct address_space_operations secretmem_aops;
|
|
|
|
static inline bool secretmem_mapping(struct address_space *mapping)
|
|
{
|
|
return mapping->a_ops == &secretmem_aops;
|
|
}
|
|
|
|
bool vma_is_secretmem(struct vm_area_struct *vma);
|
|
bool secretmem_active(void);
|
|
|
|
#else
|
|
|
|
static inline bool vma_is_secretmem(struct vm_area_struct *vma)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool secretmem_mapping(struct address_space *mapping)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool secretmem_active(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
#endif /* CONFIG_SECRETMEM */
|
|
|
|
#endif /* _LINUX_SECRETMEM_H */
|