From: Huaisheng Ye <yehs2007@zoho.com>
To: linux-nvdimm@lists.01.org, dan.j.williams@intel.com
Cc: axboe@kernel.dk, linux-s390@vger.kernel.org, chengnt@lenovo.com,
linux-fsdevel@vger.kernel.org, heiko.carstens@de.ibm.com,
linux-kernel@vger.kernel.org, willy@infradead.org,
bart.vanassche@wdc.com, viro@zeniv.linux.org.uk,
gregkh@linuxfoundation.org, schwidefsky@de.ibm.com, jack@suse.cz
Subject: [PATCH 0/5] Do not request a pointer kaddr when not required
Date: Tue, 24 Jul 2018 16:45:05 +0800 [thread overview]
Message-ID: <20180724084510.6104-1-yehs2007@zoho.com> (raw)
From: Huaisheng Ye <yehs1@lenovo.com>
Some functions within fs/dax and dax/super don't need to get kaddr from
direct_access. Assigning NULL to kaddr to ->direct_access() is more
straightforward and simple than offering a useless local pointer.
So all direct_access() need to check the validity of second rank pointer
kaddr for NULL assignment. If kaddr equals to NULL, it doesn't need to
calculate its value.
* This series are supplement to [PATCH v2 00/14]mm: Asynchronous +
multithreaded memmap init for ZONE_DEVICE. [1]
[1]: https://lkml.org/lkml/2018/7/16/828
Huaisheng Ye (5):
libnvdimm, pmem: Allow a NULL-kaddr to ->direct_access()
tools/testing/nvdimm: Allow a NULL-kaddr to ->direct_access()
s390, dcssblk: Allow a NULL-kaddr to ->direct_access()
filesystem-dax: Do not request a pointer kaddr when not required
dax/super: Do not request a pointer kaddr when not required
drivers/dax/super.c | 3 +--
drivers/nvdimm/pmem.c | 4 +++-
drivers/s390/block/dcssblk.c | 3 ++-
fs/dax.c | 3 +--
tools/testing/nvdimm/pmem-dax.c | 6 ++++--
5 files changed, 11 insertions(+), 8 deletions(-)
--
1.8.3.1
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next reply other threads:[~2018-07-24 8:45 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-24 8:45 Huaisheng Ye [this message]
2018-07-24 8:45 ` [PATCH 1/5] libnvdimm, pmem: Allow a NULL-kaddr to ->direct_access() Huaisheng Ye
2018-07-24 8:45 ` [PATCH 2/5] tools/testing/nvdimm: " Huaisheng Ye
2018-07-24 8:45 ` [PATCH 3/5] s390, dcssblk: " Huaisheng Ye
2018-07-24 8:53 ` Christian Borntraeger
2018-07-24 9:46 ` [External] " Huaisheng HS1 Ye
2018-07-24 11:16 ` Christian Borntraeger
2018-07-24 14:28 ` Huaisheng HS1 Ye
2018-07-24 8:45 ` [PATCH 4/5] filesystem-dax: Do not request a pointer kaddr when not required Huaisheng Ye
2018-07-24 8:45 ` [PATCH 5/5] dax/super: " Huaisheng Ye
2018-07-24 14:50 ` [PATCH 0/5] " Ross Zwisler
2018-07-24 15:41 ` [External] " Huaisheng HS1 Ye
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