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fs: dcache documentation cleanup

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Remove redundant (and incorrect, since dcache RCU lookup) dentry locking
documentation and point to the canonical document.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
This commit is contained in:
Nick Piggin
2011-01-07 17:49:22 +11:00
parent fbc8d4c046
commit 5eef7fa905
1 changed files with 6 additions and 12 deletions
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18
include/linux/dcache.h
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@@ -141,22 +141,16 @@ struct dentry_operations {
char *(*d_dname)(struct dentry *, char *, int); char *(*d_dname)(struct dentry *, char *, int);
}; };
/* the dentry parameter passed to d_hash and d_compare is the parent /*
* Locking rules for dentry_operations callbacks are to be found in
* Documentation/filesystems/Locking. Keep it updated!
*
* the dentry parameter passed to d_hash and d_compare is the parent
* directory of the entries to be compared. It is used in case these * directory of the entries to be compared. It is used in case these
* functions need any directory specific information for determining * functions need any directory specific information for determining
* equivalency classes. Using the dentry itself might not work, as it * equivalency classes. Using the dentry itself might not work, as it
* might be a negative dentry which has no information associated with * might be a negative dentry which has no information associated with
* it */ * it.
/*
locking rules:
big lock dcache_lock d_lock may block
d_revalidate: no no no yes
d_hash no no no yes
d_compare: no yes yes no
d_delete: no yes no no
d_release: no no no yes
d_iput: no no no yes
*/ */
/* d_flags entries */ /* d_flags entries */