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| author | Eric Dumazet <dada1@cosmosbay.com> | 2008-12-10 18:35:45 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2009-01-01 00:07:42 +0100 |
| commit | fd659fd6275d3426d7967da1f0e3638bbbd2fedb (patch) | |
| tree | 0c499f1c63a18d1dd8e70b278ad59c00262f21a8 /Documentation/filesystems/files.txt | |
| parent | make INIT_FS use the __RW_LOCK_UNLOCKED initialization (diff) | |
| download | linux-fd659fd6275d3426d7967da1f0e3638bbbd2fedb.tar.xz linux-fd659fd6275d3426d7967da1f0e3638bbbd2fedb.zip | |
fix f_count description in Documentation/filesystems/files.txt
Documentation/filesystems/files.txt was not updated when
f_count became an atomic_long_t.
atomic_long_inc_not_zero() is now used instead of atomic_inc_not_zero()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'Documentation/filesystems/files.txt')
| -rw-r--r-- | Documentation/filesystems/files.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/filesystems/files.txt b/Documentation/filesystems/files.txt index bb0142f61084..ac2facc50d2a 100644 --- a/Documentation/filesystems/files.txt +++ b/Documentation/filesystems/files.txt @@ -76,13 +76,13 @@ the fdtable structure - 5. Handling of the file structures is special. Since the look-up of the fd (fget()/fget_light()) are lock-free, it is possible that look-up may race with the last put() operation on the - file structure. This is avoided using atomic_inc_not_zero() + file structure. This is avoided using atomic_long_inc_not_zero() on ->f_count : rcu_read_lock(); file = fcheck_files(files, fd); if (file) { - if (atomic_inc_not_zero(&file->f_count)) + if (atomic_long_inc_not_zero(&file->f_count)) *fput_needed = 1; else /* Didn't get the reference, someone's freed */ @@ -92,7 +92,7 @@ the fdtable structure - .... return file; - atomic_inc_not_zero() detects if refcounts is already zero or + atomic_long_inc_not_zero() detects if refcounts is already zero or goes to zero during increment. If it does, we fail fget()/fget_light(). |