diff options
| author | Mike Kravetz <mike.kravetz@oracle.com> | 2020-10-13 16:56:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-13 18:38:34 -0700 |
| commit | 0bf7b64e6e51eb69cf6fce7c9f7ff44840393e64 (patch) | |
| tree | c3abf285b8d4c709ef66fdc71bafc42be135d67b /Documentation/trace | |
| parent | 6664bfc8e934dd008565510a41d86a552bd0bb00 (diff) | |
hugetlb: add lockdep check for i_mmap_rwsem held in huge_pmd_share
As a debugging aid, huge_pmd_share should make sure i_mmap_rwsem is held
if necessary. To clarify the 'if necessary', expand the comment block at
the beginning of huge_pmd_share.
No functional change. The added i_mmap_assert_locked() call is only
enabled if CONFIG_LOCKDEP.
Ideally, this should have been included with commit 34ae204f1851
("hugetlbfs: remove call to huge_pte_alloc without i_mmap_rwsem").
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Link: https://lkml.kernel.org/r/20200911201248.88537-1-mike.kravetz@oracle.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/trace')
0 files changed, 0 insertions, 0 deletions