On Mon, Dec 04, 2017 at 10:21:56PM +0300, Aliaksei Karaliou wrote:
> Lustre code lacks checking the result of register_shrinker()
> in several places. register_shrinker() was tagged __must_check
> recently so that sparse has started reporting it.
>
> Signed-off-by: Aliaksei Karaliou <akaraliou....@gmail.com>
> ---
> drivers/staging/lustre/lustre/ldlm/ldlm_pool.c | 12 +++++++++---
> drivers/staging/lustre/lustre/obdclass/lu_object.c | 5 +++--
> drivers/staging/lustre/lustre/osc/osc_request.c | 4 +++-
> drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c | 8 +++++++-
> 4 files changed, 22 insertions(+), 7 deletions(-)
>
> v2: Style fixes, as suggested by Cheers, Andreas and Dan Carpenter.
> Added one more patch to address resource cleanup, suggested by Dan
> Carpenter.
>
> diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
> b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
> index da65d00a7811..9fef2d52d6c2 100644
> --- a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
> +++ b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
> @@ -1086,10 +1086,16 @@ int ldlm_pools_init(void)
> int rc;
>
> rc = ldlm_pools_thread_start();
> - if (rc == 0)
> - register_shrinker(&ldlm_pools_cli_shrinker);
> + if (rc)
> + return rc;
>
> - return rc;
> + rc = register_shrinker(&ldlm_pools_cli_shrinker);
> + if (rc) {
> + ldlm_pools_thread_stop();
> + return rc;
> + }
> +
> + return 0;
> }
>
> void ldlm_pools_fini(void)
> diff --git a/drivers/staging/lustre/lustre/obdclass/lu_object.c
> b/drivers/staging/lustre/lustre/obdclass/lu_object.c
> index b938a3f9d50a..9e0256ca2079 100644
> --- a/drivers/staging/lustre/lustre/obdclass/lu_object.c
> +++ b/drivers/staging/lustre/lustre/obdclass/lu_object.c
> @@ -1951,7 +1951,7 @@ int lu_global_init(void)
> * inode, one for ea. Unfortunately setting this high value results in
> * lu_object/inode cache consuming all the memory.
> */
> - register_shrinker(&lu_site_shrinker);
> + result = register_shrinker(&lu_site_shrinker);
>
> return result;
return register_shrinker()?
> - register_shrinker(&pools_shrinker);
> + rc = register_shrinker(&pools_shrinker);
> + if (rc) {
> + enc_pools_free();
> + return rc;
Drop the return rc, and then just do:
> + }
>
> return 0;
return rc;
there. Makes the patch smaller.
thanks,
greg k-h
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