mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 04:41:15 +07:00
da1c55f1b2
Rename the mmap_sem field to mmap_lock. Any new uses of this lock should now go through the new mmap locking api. The mmap_lock is still implemented as a rwsem, though this could change in the future. [akpm@linux-foundation.org: fix it for mm-gup-might_lock_readmmap_sem-in-get_user_pages_fast.patch] Signed-off-by: Michel Lespinasse <walken@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Davidlohr Bueso <dbueso@suse.de> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: David Rientjes <rientjes@google.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Laurent Dufour <ldufour@linux.ibm.com> Cc: Liam Howlett <Liam.Howlett@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ying Han <yinghan@google.com> Link: http://lkml.kernel.org/r/20200520052908.204642-11-walken@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
#ifndef _LINUX_MMAP_LOCK_H
|
|
#define _LINUX_MMAP_LOCK_H
|
|
|
|
#include <linux/mmdebug.h>
|
|
|
|
#define MMAP_LOCK_INITIALIZER(name) \
|
|
.mmap_lock = __RWSEM_INITIALIZER((name).mmap_lock),
|
|
|
|
static inline void mmap_init_lock(struct mm_struct *mm)
|
|
{
|
|
init_rwsem(&mm->mmap_lock);
|
|
}
|
|
|
|
static inline void mmap_write_lock(struct mm_struct *mm)
|
|
{
|
|
down_write(&mm->mmap_lock);
|
|
}
|
|
|
|
static inline void mmap_write_lock_nested(struct mm_struct *mm, int subclass)
|
|
{
|
|
down_write_nested(&mm->mmap_lock, subclass);
|
|
}
|
|
|
|
static inline int mmap_write_lock_killable(struct mm_struct *mm)
|
|
{
|
|
return down_write_killable(&mm->mmap_lock);
|
|
}
|
|
|
|
static inline bool mmap_write_trylock(struct mm_struct *mm)
|
|
{
|
|
return down_write_trylock(&mm->mmap_lock) != 0;
|
|
}
|
|
|
|
static inline void mmap_write_unlock(struct mm_struct *mm)
|
|
{
|
|
up_write(&mm->mmap_lock);
|
|
}
|
|
|
|
static inline void mmap_write_downgrade(struct mm_struct *mm)
|
|
{
|
|
downgrade_write(&mm->mmap_lock);
|
|
}
|
|
|
|
static inline void mmap_read_lock(struct mm_struct *mm)
|
|
{
|
|
down_read(&mm->mmap_lock);
|
|
}
|
|
|
|
static inline int mmap_read_lock_killable(struct mm_struct *mm)
|
|
{
|
|
return down_read_killable(&mm->mmap_lock);
|
|
}
|
|
|
|
static inline bool mmap_read_trylock(struct mm_struct *mm)
|
|
{
|
|
return down_read_trylock(&mm->mmap_lock) != 0;
|
|
}
|
|
|
|
static inline void mmap_read_unlock(struct mm_struct *mm)
|
|
{
|
|
up_read(&mm->mmap_lock);
|
|
}
|
|
|
|
static inline bool mmap_read_trylock_non_owner(struct mm_struct *mm)
|
|
{
|
|
if (down_read_trylock(&mm->mmap_lock)) {
|
|
rwsem_release(&mm->mmap_lock.dep_map, _RET_IP_);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static inline void mmap_read_unlock_non_owner(struct mm_struct *mm)
|
|
{
|
|
up_read_non_owner(&mm->mmap_lock);
|
|
}
|
|
|
|
static inline void mmap_assert_locked(struct mm_struct *mm)
|
|
{
|
|
lockdep_assert_held(&mm->mmap_lock);
|
|
VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
|
|
}
|
|
|
|
static inline void mmap_assert_write_locked(struct mm_struct *mm)
|
|
{
|
|
lockdep_assert_held_write(&mm->mmap_lock);
|
|
VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);
|
|
}
|
|
|
|
#endif /* _LINUX_MMAP_LOCK_H */
|