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Documentation/filesystems/files.txt: remove rcuref_inc_lf() reverences

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rcuref_inc_lf() is not used anymore. Replace it by atomic_inc_not_zero()

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
This commit is contained in:
Eric Dumazet
2007-10-20 01:47:49 +02:00
committed by Adrian Bunk
parent 6888c1ecd6
commit 94547426db
1 changed files with 3 additions and 3 deletions
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6
Documentation/filesystems/files.txt
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@@ -76,13 +76,13 @@ the fdtable structure -
5. Handling of the file structures is special. Since the look-up 5. Handling of the file structures is special. Since the look-up
of the fd (fget()/fget_light()) are lock-free, it is possible of the fd (fget()/fget_light()) are lock-free, it is possible
that look-up may race with the last put() operation on the that look-up may race with the last put() operation on the
file structure. This is avoided using the rcuref APIs file structure. This is avoided using atomic_inc_not_zero()
on ->f_count : on ->f_count :
rcu_read_lock(); rcu_read_lock();
file = fcheck_files(files, fd); file = fcheck_files(files, fd);
if (file) { if (file) {
if (rcuref_inc_lf(&file->f_count)) if (atomic_inc_not_zero(&file->f_count))
*fput_needed = 1; *fput_needed = 1;
else else
/* Didn't get the reference, someone's freed */ /* Didn't get the reference, someone's freed */
@@ -92,7 +92,7 @@ the fdtable structure -
.... ....
return file; return file;
rcuref_inc_lf() detects if refcounts is already zero or atomic_inc_not_zero() detects if refcounts is already zero or
goes to zero during increment. If it does, we fail goes to zero during increment. If it does, we fail
fget()/fget_light(). fget()/fget_light().