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OpenCloudOS-Kernel
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mbcache: remove unnecessary module_get/module_put 

When mbcache is built as a module, any modules that use it (ext2 and/or
ext4) will depend on its symbols directly, incrementing its reference
count.  Therefore, there is no need to do module_get/module_put.

Also note that since the module_get/module_put were in the mbcache
module itself, executing those lines of code was already dependent on
another reference to the mbcache module being held.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Eric Biggers 2016-12-03 15:38:29 -05:00 committed by Theodore Ts'o
parent 21d0f4fa8e
commit 97c7b18a5d
1 changed files with 0 additions and 5 deletions
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5
fs/mbcache.c
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@ -344,9 +344,6 @@ struct mb_cache *mb_cache_create(int bucket_bits)
int bucket_count = 1 << bucket_bits; int bucket_count = 1 << bucket_bits;
int i; int i;
if (!try_module_get(THIS_MODULE))
return NULL;
cache = kzalloc(sizeof(struct mb_cache), GFP_KERNEL); cache = kzalloc(sizeof(struct mb_cache), GFP_KERNEL);
if (!cache) if (!cache)
goto err_out; goto err_out;
@ -377,7 +374,6 @@ struct mb_cache *mb_cache_create(int bucket_bits)
return cache; return cache;
err_out: err_out:
module_put(THIS_MODULE);
return NULL; return NULL;
} }
EXPORT_SYMBOL(mb_cache_create); EXPORT_SYMBOL(mb_cache_create);
@ -411,7 +407,6 @@ void mb_cache_destroy(struct mb_cache *cache)
} }
kfree(cache->c_hash); kfree(cache->c_hash);
kfree(cache); kfree(cache);
module_put(THIS_MODULE);
} }
EXPORT_SYMBOL(mb_cache_destroy); EXPORT_SYMBOL(mb_cache_destroy);