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fs: change d_delete semantics

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Change d_delete from a dentry deletion notification to a dentry caching
advise, more like ->drop_inode. Require it to be constant and idempotent,
and not take d_lock. This is how all existing filesystems use the callback
anyway.

This makes fine grained dentry locking of dput and dentry lru scanning
much simpler.

Signed-off-by: Nick Piggin <[email protected]>
This commit is contained in:
Nick Piggin 2011-01-07 17:49:23 +11:00
commit fe15ce446b
22 changed files with 47 additions and 42 deletions
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2
fs/sysfs/dir.c
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@ -231,7 +231,7 @@ void release_sysfs_dirent(struct sysfs_dirent * sd)
goto repeat;
}
static int sysfs_dentry_delete(struct dentry *dentry)
static int sysfs_dentry_delete(const struct dentry *dentry)
{
struct sysfs_dirent *sd = dentry->d_fsdata;
return !!(sd->s_flags & SYSFS_FLAG_REMOVED);