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| author | Michel Lespinasse <walken@google.com> | 2020-06-09 06:33:54 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-09 18:39:14 +0200 |
| commit | c1e8d7c6a7a682e1405e3e242d32fc377fd196ff (patch) | |
| tree | ef02402b77990834fbb5bdb1f146fc0393cc8987 /Documentation/vm/transhuge.rst | |
| parent | mmap locking API: convert mmap_sem API comments (diff) | |
| download | linux-c1e8d7c6a7a682e1405e3e242d32fc377fd196ff.tar.xz linux-c1e8d7c6a7a682e1405e3e242d32fc377fd196ff.zip | |
mmap locking API: convert mmap_sem comments
Convert comments that reference mmap_sem to reference mmap_lock instead.
[akpm@linux-foundation.org: fix up linux-next leftovers]
[akpm@linux-foundation.org: s/lockaphore/lock/, per Vlastimil]
[akpm@linux-foundation.org: more linux-next fixups, per Michel]
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: Daniel Jordan <daniel.m.jordan@oracle.com>
Cc: Davidlohr Bueso <dbueso@suse.de>
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/20200520052908.204642-13-walken@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/vm/transhuge.rst')
| -rw-r--r-- | Documentation/vm/transhuge.rst | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/vm/transhuge.rst b/Documentation/vm/transhuge.rst index 37c57ca32629..0ed23e59abe5 100644 --- a/Documentation/vm/transhuge.rst +++ b/Documentation/vm/transhuge.rst @@ -98,9 +98,9 @@ split_huge_page() or split_huge_pmd() has a cost. To make pagetable walks huge pmd aware, all you need to do is to call pmd_trans_huge() on the pmd returned by pmd_offset. You must hold the -mmap_sem in read (or write) mode to be sure a huge pmd cannot be +mmap_lock in read (or write) mode to be sure a huge pmd cannot be created from under you by khugepaged (khugepaged collapse_huge_page -takes the mmap_sem in write mode in addition to the anon_vma lock). If +takes the mmap_lock in write mode in addition to the anon_vma lock). If pmd_trans_huge returns false, you just fallback in the old code paths. If instead pmd_trans_huge returns true, you have to take the page table lock (pmd_lock()) and re-run pmd_trans_huge. Taking the |