fs/dcache: Re-use value stored to dentry->d_flags instead of re-reading
Currently, the __d_clear_type_and_inode() writes the value flags to dentry->d_flags, then immediately re-reads it in order to use it in a if statement. This re-read is useless because no other update to dentry->d_flags can occur at this point. This commit therefore re-use flags in the if statement instead of re-reading dentry->d_flags. Signed-off-by: linke li <lilinke99@qq.com> Link: https://lore.kernel.org/r/tencent_5E187BD0A61BA28605E85405F15228254D0A@qq.com Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org>
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@ -355,7 +355,7 @@ static inline void __d_clear_type_and_inode(struct dentry *dentry)
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flags &= ~DCACHE_ENTRY_TYPE;
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WRITE_ONCE(dentry->d_flags, flags);
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dentry->d_inode = NULL;
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if (dentry->d_flags & DCACHE_LRU_LIST)
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if (flags & DCACHE_LRU_LIST)
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this_cpu_inc(nr_dentry_negative);
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}
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