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| author | linke li <lilinke99@qq.com> | 2024-04-03 10:10:08 +0800 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-04-09 12:29:03 +0200 |
| commit | 8bfb40be31ddea0cb4664b352e1797cfe6c91976 (patch) | |
| tree | d111fa3580671ccb8b267740bc4dedfa9341d60f | |
| parent | 886b94d25a8eba4c42634dddc3cbfd6391a24d25 (diff) | |
| download | linux-8bfb40be31ddea0cb4664b352e1797cfe6c91976.tar.gz linux-8bfb40be31ddea0cb4664b352e1797cfe6c91976.tar.bz2 linux-8bfb40be31ddea0cb4664b352e1797cfe6c91976.zip | |
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>
| -rw-r--r-- | fs/dcache.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index 71a8e943a0fa..407095188f83 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -355,7 +355,7 @@ static inline void __d_clear_type_and_inode(struct dentry *dentry) flags &= ~DCACHE_ENTRY_TYPE; WRITE_ONCE(dentry->d_flags, flags); dentry->d_inode = NULL; - if (dentry->d_flags & DCACHE_LRU_LIST) + if (flags & DCACHE_LRU_LIST) this_cpu_inc(nr_dentry_negative); } |