diff options
| author |   Michel Lespinasse <walken@google.com> | 2020-06-08 21:33:47 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-09 09:39:14 -0700 |
| commit | da1c55f1b272f4bd54671d459b39ea7b54944ef9 (patch) | |
| tree | c4e379582d0860861c2a00414a01597a83bfbd2b /mm | |
| parent | mmap locking API: add mmap_assert_locked() and mmap_assert_write_locked() (diff) | |
| download | wireguard-linux-da1c55f1b272f4bd54671d459b39ea7b54944ef9.tar.xz wireguard-linux-da1c55f1b272f4bd54671d459b39ea7b54944ef9.zip | |
mmap locking API: rename mmap_sem to mmap_lock
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>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/gup.c | 2 | ||||
| -rw-r--r-- | mm/memory.c | 2 | ||||
| -rw-r--r-- | mm/mmap.c | 4 | ||||
| -rw-r--r-- | mm/mmu_notifier.c | 2 |
4 files changed, 5 insertions, 5 deletions
@@ -2750,7 +2750,7 @@ static int internal_get_user_pages_fast(unsigned long start, int nr_pages, return -EINVAL; if (!(gup_flags & FOLL_FAST_ONLY)) - might_lock_read(¤t->mm->mmap_sem); + might_lock_read(¤t->mm->mmap_lock); start = untagged_addr(start) & PAGE_MASK; addr = start; diff --git a/mm/memory.c b/mm/memory.c index 533293faaaf5..823982a8f0b0 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4804,7 +4804,7 @@ void __might_fault(const char *file, int line) __might_sleep(file, line, 0); #if defined(CONFIG_DEBUG_ATOMIC_SLEEP) if (current->mm) - might_lock_read(¤t->mm->mmap_sem); + might_lock_read(¤t->mm->mmap_lock); #endif } EXPORT_SYMBOL(__might_fault); diff --git a/mm/mmap.c b/mm/mmap.c index 7ed7cfca451e..a28778da76a3 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -3474,7 +3474,7 @@ static void vm_lock_anon_vma(struct mm_struct *mm, struct anon_vma *anon_vma) * The LSB of head.next can't change from under us * because we hold the mm_all_locks_mutex. */ - down_write_nest_lock(&anon_vma->root->rwsem, &mm->mmap_sem); + down_write_nest_lock(&anon_vma->root->rwsem, &mm->mmap_lock); /* * We can safely modify head.next after taking the * anon_vma->root->rwsem. If some other vma in this mm shares @@ -3504,7 +3504,7 @@ static void vm_lock_mapping(struct mm_struct *mm, struct address_space *mapping) */ if (test_and_set_bit(AS_MM_ALL_LOCKS, &mapping->flags)) BUG(); - down_write_nest_lock(&mapping->i_mmap_rwsem, &mm->mmap_sem); + down_write_nest_lock(&mapping->i_mmap_rwsem, &mm->mmap_lock); } } diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c index 24eb9d1ed0a7..2f348b6c9c9a 100644 --- a/mm/mmu_notifier.c +++ b/mm/mmu_notifier.c @@ -983,7 +983,7 @@ int mmu_interval_notifier_insert(struct mmu_interval_notifier *interval_sub, struct mmu_notifier_subscriptions *subscriptions; int ret; - might_lock(&mm->mmap_sem); + might_lock(&mm->mmap_lock); subscriptions = smp_load_acquire(&mm->notifier_subscriptions); if (!subscriptions || !subscriptions->has_itree) { |