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authorMike Kravetz <mike.kravetz@oracle.com>2020-10-13 16:56:42 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-13 18:38:34 -0700
commit0bf7b64e6e51eb69cf6fce7c9f7ff44840393e64 (patch)
treec3abf285b8d4c709ef66fdc71bafc42be135d67b /samples/bpf/tracex7_kern.c
parent6664bfc8e934dd008565510a41d86a552bd0bb00 (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 'samples/bpf/tracex7_kern.c')
0 files changed, 0 insertions, 0 deletions