From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Gao Xiang <gaoxiang25@huawei.com>
Cc: devel@driverdev.osuosl.org, linux-erofs@lists.ozlabs.org,
Chao Yu <yuchao0@huawei.com>, LKML <linux-kernel@vger.kernel.org>,
weidu.du@huawei.com, Miao Xie <miaoxie@huawei.com>
Subject: Re: [PATCH 05/10] staging: erofs: add a full barrier in erofs_workgroup_unfreeze
Date: Thu, 22 Nov 2018 11:22:31 +0100 [thread overview]
Message-ID: <20181122102230.GF3189@kroah.com> (raw)
In-Reply-To: <20181120143425.43637-6-gaoxiang25@huawei.com>
On Tue, Nov 20, 2018 at 10:34:20PM +0800, Gao Xiang wrote:
> Just like other generic locks, insert a full barrier
> in case of memory reorder.
>
> Reviewed-by: Chao Yu <yuchao0@huawei.com>
> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
> ---
> drivers/staging/erofs/internal.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/staging/erofs/internal.h b/drivers/staging/erofs/internal.h
> index 2e0ef92c138b..f77653d33633 100644
> --- a/drivers/staging/erofs/internal.h
> +++ b/drivers/staging/erofs/internal.h
> @@ -209,6 +209,7 @@ static inline bool erofs_workgroup_try_to_freeze(struct erofs_workgroup *grp,
> static inline void erofs_workgroup_unfreeze(struct erofs_workgroup *grp,
> int orig_val)
> {
> + smp_mb();
Please document this memory barrier. It does not make much sense to
me...
thanks,
greg k-h
next prev parent reply other threads:[~2018-11-22 10:22 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-20 14:34 [PATCH 00/10] staging: erofs: decompression stability enhancement Gao Xiang
2018-11-20 14:34 ` [PATCH 01/10] staging: erofs: fix `trace_erofs_readpage' position Gao Xiang
2018-11-22 10:19 ` Greg Kroah-Hartman
2018-11-22 10:49 ` Gao Xiang
2018-11-22 11:00 ` Greg Kroah-Hartman
2018-11-20 14:34 ` [PATCH 02/10] staging: erofs: fix race when the managed cache is enabled Gao Xiang
2018-11-22 10:17 ` Greg Kroah-Hartman
2018-11-22 10:42 ` Gao Xiang
2018-11-22 11:06 ` Greg Kroah-Hartman
2018-11-22 11:43 ` Gao Xiang
2018-11-22 12:26 ` Greg Kroah-Hartman
2018-11-22 12:41 ` Gao Xiang
2018-11-22 13:20 ` Greg Kroah-Hartman
2018-11-22 10:19 ` Greg Kroah-Hartman
2018-11-20 14:34 ` [PATCH 03/10] staging: erofs: atomic_cond_read_relaxed on ref-locked workgroup Gao Xiang
2018-11-22 10:20 ` Greg Kroah-Hartman
2018-11-20 14:34 ` [PATCH 04/10] staging: erofs: fix `erofs_workgroup_{try_to_freeze, unfreeze}' Gao Xiang
2018-11-22 10:21 ` Greg Kroah-Hartman
2018-11-22 10:29 ` Gao Xiang
2018-11-22 11:03 ` Greg Kroah-Hartman
2018-11-22 11:05 ` Greg Kroah-Hartman
2018-11-22 11:22 ` Gao Xiang
2018-11-20 14:34 ` [PATCH 05/10] staging: erofs: add a full barrier in erofs_workgroup_unfreeze Gao Xiang
2018-11-22 10:22 ` Greg Kroah-Hartman [this message]
2018-11-22 10:56 ` Gao Xiang
2018-11-22 18:50 ` Andrea Parri
2018-11-23 2:51 ` Gao Xiang
2018-11-23 9:51 ` Andrea Parri
2018-11-23 10:00 ` Gao Xiang
2018-11-20 14:34 ` [PATCH 06/10] staging: erofs: fix the definition of DBG_BUGON Gao Xiang
2018-11-20 14:34 ` [PATCH 07/10] staging: erofs: separate into init_once / always Gao Xiang
2018-11-22 10:23 ` Greg Kroah-Hartman
2018-11-22 10:34 ` Gao Xiang
2018-11-22 11:05 ` Greg Kroah-Hartman
2018-11-22 11:11 ` Gao Xiang
2018-11-22 11:26 ` Greg Kroah-Hartman
2018-11-22 11:37 ` Gao Xiang
2018-11-22 12:00 ` Gao Xiang
2018-11-22 13:01 ` Gao Xiang
2018-11-22 13:23 ` Greg Kroah-Hartman
2018-11-22 13:59 ` Gao Xiang
2018-11-20 14:34 ` [PATCH 08/10] staging: erofs: locked before registering for all new workgroups Gao Xiang
2018-11-22 10:24 ` Greg Kroah-Hartman
2018-11-22 10:35 ` Gao Xiang
2018-11-20 14:34 ` [PATCH 09/10] staging: erofs: decompress asynchronously if PG_readahead page at first Gao Xiang
2018-11-20 14:34 ` [PATCH 10/10] staging: erofs: rename strange variable names in z_erofs_vle_frontend Gao Xiang
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